The molar mass of the gas sample is closest to the molar mass of option (e) SO2, which is 64.07 g/mol. Therefore, the gas sample is likely SO2.
To determine the identity of the gas sample, you can use the ideal gas law, which relates the pressure, volume, temperature, and number of moles of a gas. The ideal gas law can be expressed as:
PV = nRT
where P is the pressure of the gas in units of atm, V is the volume of the gas in liters, n is the number of moles of gas, R is the gas constant (8.31 J/mol*K), and T is the temperature of the gas in Kelvin.
To use this equation, you need to convert the temperature to Kelvin by adding 273.15 to the temperature in Celsius. You also need to convert the pressure from torr to atm by dividing the pressure in torr by 760 (since 1 atm = 760 torr).
Using these conversions, you can plug in the values given in the problem to solve for the number of moles of gas:
P = 790 torr / 760 = 1.03 atm
V = 1.365 L
T = 95 °C + 273.15 = 368.15 K
R = 8.31 J/mol*K
Plugging these values into the ideal gas law equation gives:
1.03 atm * 1.365 L = n * 8.31 J/mol*K * 368.15 K
Solving for n gives:
n = 0.0428 mol
Now that you know the number of moles of gas, you can use the molar mass of each of the gases listed in the options to determine which gas has a molar mass closest to the mass of the sample. The mass of the sample is 3.33 g, so you can calculate the molar mass of the gas by dividing the mass of the sample by the number of moles:
3.33 g / 0.0428 mol = 77.9 g/mol
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which statement is true regarding the conversion of arginine to ornithine in the urea cycle? a. the enzyme catalyzing this reaction is a hydrolase. b. this enzyme-catalyzed reaction occurs in the matrix. c. one of the products of this reaction is fumarate. d. the enzyme catalyzing this reaction is a ligase. e. the enzyme catalyzing this reaction is a hydrolase, and the reaction occurs in a matrix.
This reaction is catalyzed by an enzyme called a hydrolase, and it takes place in a matrix.
What enzyme does arginine's transformation into urea and ornithine?By converting l-arginine to l-ornithine and urea, the ureohydrolase arginase, an enzyme that contains manganese, catalyzes the last stage in the urea cycle to get rid of harmful ammonia.
Why is arginine necessary for the urea cycle?It is changed by the enzyme arginase into L-ornithine, a building block for polyamines and urea, both of which are necessary for the urea cycle. Arg is a precursor of creatine, which is responsible for Arg catabolism, the production of agmatine, and the synthesis of proteins. Creatine is crucial for the energy metabolism of muscle, neuron, and testicles.
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If the bond angle between two adjacent hybrid orbitals is 120°, which is the hybridization?
a. sp3d2
b. sp
c. sp3
d. sp2
Hybridization would be sp2 if the bond angle between the two adjacent angle is 120 degrees.
What is hybridization ?
The idea of combining two atomic orbitals to create a new class of hybridised orbitals is known as hybridization in chemistry. This mixing typically produces hybrid orbitals with completely distinct energies, geometries, etc.
An atom's s and two p orbitals from the same shell combine to generate three equivalent orbitals when sp2 hybridization occurs. The newly created orbitals are known as sp2 hybrid orbitals.
Angles in the trigonal symmetry are found to be at 120 degrees and they show sp2 hybridization.
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12.7 l of argon at 33°c and 735 torr are dissolved in enough water to give a final volume of 0.750 l. what is the molarity of the resulting solution?
The final solution has a molarity of 0.652 M. This is derived using the ideal gas equation expression and molarity relation.
Molarity-Molarity (M) is the amount of a substance in a given volume of solution. Molarity is defined as the number of moles of a solute per liter of solution. The molar concentration of a solution is also known as its molarity.
M=n/v
n=moles of solute
v=litres of water
At 33°C and 735 Torr, 12.7 l of argon is dissolved in enough water to yield a final volume of 0.750l.
P = 735.0 torr
= (735.0/760) atm.
= 0.9671 atm.
V = 12.7 L
T = 33.0 o C
= (33.0+273) K
= 306 k
using ideal gas equation
P * V = n*R*T
0.9671 atm. * 12.7 L = n * 0.08206 atm. L/mole . K * 306 K
n = 0.4891 mole
using molarity formula,
Molarity = number of mole / final volume
= 0.4891 mole / 0.750 L
= 0.652 M (resulting solution)
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A sample of xe takes 75 seconds to effuse out of a container. An unknown gas takes 83 seconds to effuse out of the identical container under identical conditions.
Nicotine has molar mass nearly equal to 160.90 g/ mol
The two gas required different times to be diffused from the same container. Thus, the rate of diffusion has been proportional to the molar mass of the substance.
Thus, the ratio of the rate of two samples can be given by:
[tex]\frac{Rate ofA}{Rate of B}[/tex] = [tex]\frac{Molar mass of A}{Molar mass of B}[/tex]
Rate can be defined as the amount diffuses per unit time. The equation in terms of time can be given as:
[tex]\frac{Time of B}{Time of A}[/tex] =[tex]\sqrt \frac{molar mass of B}{Molar mass of A}[/tex]
Let gas B be Xenon, having diffusion time 75 sec, and molar mass 131.3 g/mol
[tex]\frac{75}{83}[/tex] =[tex]\sqrt\frac{131.3}{molar mass of A} }[/tex]
molar mass of A = 160.90g / mol
Nicotine has molar mass nearly equal to 160.90 g/ mol
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What are 6 required elements of a supplier label?
The 6 required elements of a supplier label are product identifier, supplier identifier , the signal word, the hazard statement, pictograms and the precautionary statement.
The supplier label must requires the 6 elements that is product identifier that is the name of the product and the ingredients of the product., supplier identifier that the information about the supplier such as supplier name and company , the signal word, the hazard statement this helps to use the chemical or while transferring the chemical, pictograms and the precautionary statement.
Thus, product identifier, supplier identifier , the signal word, the hazard statement, pictograms and the precautionary statement required for the supplier label.
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What information is not required on a workplace label?
The information is not required on a workplace label is the particular language border.
The workplace label not need to required the particular border of the language but the do need the following things that is the data of the product identification for the secure product handling. the workplace label is useful for the identification of the hazardous chemical that has been transferred the one of the container to the other container. the name of the chemical should be written as same as on the SDS.
Thus, the particular language border is the information is not require in the workplace label.
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How many grams of KCl can be dissolved in 100g of water at 20 C?
The solution to the problem gives you the potassium chloride, KCl, solubility in water at 20°C, which is stated to be 34 g/100 g H2O. This indicates that at 20 °C.
34 g of dissolved salt will be present in a saturated potassium chloride solution for every 100 g of water. One or more solutes combined uniformly in a solvent form a solution. One typical example of a solution is adding sugar cubes to a cup of tea or coffee. Solubility is a characteristic that makes sugar molecules more soluble. Consequently, the word "solubility" can be used to describe a quality of a substance (solute). The metal halide salt potassium chloride (KCl, often known as potassium salt) is made up of both potassium and chlorine.
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A student adds 14.0 mL of water to 12.0 mL of alcohol. Which of the following is possible for the volume of the resulting solution?
A: 28.0 mL
B: 25.0 mL
C: 27.0 mL
D: 26.0 mL
The possible volume of the resulting solution if a student adds 14.0 mL of water to 12.0 mL of alcohol is 26.0mL (option D).
What is volume?Volume is a measure of the amount of space that matter occupies. Matter is defined as a physical substance that occupies space and has a mass.
In physical sciences like chemistry, the standard unit of volume is cubic metres (m³). From this, other units are derived including litre (L) and millilitre (mL).
According to this question, a student adds 14.0 mL of water to 12.0 mL of alcohol. These substances are both liquid meaning that the volume of the resulting solution will increase as follows:
12 + 14 = 26.0mL
Hence, option D is the correct answer.
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The js joint has an 18% market share of the fast-food market in india. The market is worth $12 million per year. Calculate the annual sales of js joint.
The js joint has an 18% market share of the fast-food market in India. The market is worth $12 million per year, so the annual sales of js joint will be (c) 2.16 million per year.
Market share is the percentage of a market's or industry's total sales that a specific company generates over a specific period of time. By dividing a company's entire sales revenue by the total industry sales throughout a fiscal year, one can determine its market share. The market share of fast food in India is 18%. Each year, the trade is valued $12 million.
The corporation calculates its annual sales as follows:-
The annual sale is equal to the market value multiplied by the percentage of the market share.
Annual sale = $12,000,000 x 18%
Annual sale = $2,16,000,000 annually
Annual sale = $2.16 Million / year
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if the solvent-solute interactions are stronger than the average of the solvent-solvent and solute-solute interactions, then heat is evolved and the overall mixing process is said to be
The overall reaction of this process is called endothermic process.
What is endothermic process?
Chemical reactions classified as endothermic occur when the reactants absorb heat energy from their surroundings to produce products. By lowering the temperature of the area around them, these processes generate a cooling effect.
What is reaction ?
In a chemical reaction, one or more substances, also referred to as reactants, are transformed into one or more unique compounds, usually referred to as products. Substances are made up of chemical compounds or chemical components.
Therefore, the overall reaction of this process is called endothermic process.
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What is the formula for calculating gas?
The equations describing these laws are special cases of the ideal gas law, PV = nRT, where P is the pressure of the gas, V is its volume, n is the number of moles of the gas, T is its kelvin temperature, and R is the ideal (universal) gas constant.
By rearranging the ideal gas law, P=n(RTV)=nconst, it can be demonstrated that the pressure of a sample of gas is directly proportional to the number of moles of gas present when volume and temperature are maintained constant. The common measurement of pressure is the pascal (Pa). The kilopascal is the most practical measure for measuring commonplace gas pressures since a pascal is a relatively tiny unit of pressure (kPa). There are 1000 pascals in a kilopascal. The atmosphere is yet another widely used pressure measurement unit (atm).
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What is the amount of NaOH needed for preparation of 200 mL of 0.25 N solution?
2g is the amount of NaOH needed for preparation of 200 mL of 0.25 N solution
Given that;
Concentration of Solution = 0.25 N
Volume of solution = 200 ml = 0.2 L
To find the mass of NaOH we will use following equation ;
Normality(N) = [tex]\frac{Mass of NaOH(m)}{Molar mass of NaOH(M)}[/tex] ×[tex]\frac{1000}{Volume(in ml)}[/tex]
Molar mass of NaOH = 22 + 16 + 2 = 40g/mol
Thus,0.25 = [tex]\frac{Mass of NaOH(m)}{40}[/tex] × [tex]\frac{1000}{200}[/tex]
Mass of NaOH = 0.25 × 40 × 0.2
Mass of NaOH = 2 g
So, 2g of NaOH is Used to prepare 200ml of 0.25N solution
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calculate the volume of carbon (iv) oxide measured at S.T.P that is evolved when 1 mole of copper (ii) carbonate is heated to consant mass?
The volume of carbon (iv) oxide measured at S.T.P. that is evolved when one mole of copper (ii) carbonate is heated to constant mass is 22.4 L.
What is the volume of carbon dioxide produced?The volume of carbon dioxide produced when one mole of copper (ii) carbonate is heated to constant mass is given by the equation of the reaction given below;
CuCO₃ (s) ----> CuO (s) + CO₂ (g)
The mole ratio of the reaction shown above is 1 : 1 for copper carbonate and carbon dioxide.
From the equation of the reaction, one mole of copper carbonate when heated to a constant mass produces one mole of carbon dioxide.
The volume of one mole of carbon dioxide is equal to the volume of one mole of a gas.
The volume of one mole of a gas at STP is 22.4 L
Hence the volume of carbon dioxide evolved is 22.4 L
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What will be the product when a sulfuric acid reacted with a sodium hydroxide?
The reaction between sodium hydroxide and sulphuric acid, with the chemical formula NaOH + H2SO4, produces sodium sulfate and water (NaSO4 + H2O).
This acid-base reaction results in the production of salt and water. here in this particular reaction sodium sulfate is salt (product of the neutralisation reaction).
• Caustic soda is an inorganic strong base also referred to as sodium hydroxide, with chemical formula NaOH.
• Sulfuric acid, which is a more potent acid, with the chemical formula H2SO4 as opposed to sodium hydroxide's NaOH.
The interaction of H2SO4 and NaOH results in an acid-base reaction. Sulfuric acid and sodium hydroxide, both acid and base mix to form sodium sulphate; NaSO4, a salt, as well as water as byproducts. This reaction serves as an example of neutralisation reaction.
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24.00 ml of a 0.25 m naoh solution is titrated with 0.10m hcl. what is the ph of the solution after 24.00 ml of the hcl has been added? 13.40 13.17 11.56 12.88 7.00
The ph of the solution after 24.00 ml of the hcl has been added is 2.59.
Concentration is the abundance of a constituent divided by way of the overall volume of an aggregate. several sorts of mathematical descriptions may be outstanding: mass concentration, molar concentration, variety concentration, and extent awareness.
Calculation:-
C₁ = 0.25 M naoh
V₁ = 24 ml = 0.024 L
C₂ = 0.10 M
V₂ = 24.00 ml
concentration of acid concentration of base
concentration = N₁V₁ N₂V₂
= 0.024 L × 0.25 M = 0.10 × 0.024 L
= 6 × 10⁻³ N = 2.4 × 10⁻³ N
Net concentration = 6 × 10⁻³ - 2.4 × 10⁻³
= 2.6 10⁻³
pH = - log [ 2.6 10⁻³ ]
= 3 - log2.6
= 3 - 0.41
= 2.59
The concentration of a substance is the quantity of solute found in a given amount of solution. Concentrations are normally expressed in terms of molarity, defined because of the variety of moles of solute in 1 L of answer.
The Concentration of an answer is a measure of the quantity of solute that has been dissolved in a given amount of solvent or answer. A concentrated answer is one that has a rather huge quantity of dissolved solute.
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when 0.58 g of an unknown non-electrolyte is dissolved in 50.0 g of benzene, the freezing point decreased to 5.14 degrees c from 5.5 degrees c. if the kfp of the solvent is 5.12 k/m, calculate the molar mass of the unknown solute.
The molar mass of an unknown non-electrolyte is 165g/mol.
What is molar mass?
The molar mass of a chemical compound is defined in chemistry as the mass of a sample of that compound divided by the amount of substance, which is the number of moles in that sample, measured in moles. The molar mass of a substance is a bulk, rather than a molecular, characteristic.
∆T = imK
∆T= 5.5 - 5.14 = 0.36 degrees
Van't Hoff factor for a non-electrolyte is 1; molality is moles of unknown per kilogram of solvent; and constant is 5.12
When we solve for 'm', we have...
m = ∆T/(i)(K) = 0.36/5.12 m = 0.0703 moles unknown/kg solvent
Since the solvent has a mass of 50 g that is = 0.050kg
0.0703 mol/kg x 0.050 kg = 0.00351moles
molar mass = 0.58g/0.00351 mol = 165 g/mol
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Soduim Floride NaF has a melting point of 993 degrees celsius and Magnesium Oxide MgO has a melting point of 2852. If r (sum of the ionic radii) is approximately the same for these two, as Fe (electrostatic force) increases, would we expect the melting point to go up or down?
As the electrostatic force, Fe, of the ionic compounds increases, the melting point of the ionic compounds will go up.
What is the melting point of a solid?The melting point of a solid is the temperature at which the solid begins to melt.
The melting point of a pure solid occurs at a definite temperature. During the process of melting, the temperature of the solid remains constant as all the heat supplied to the substance is used to break up the energy of the intermolecular forces between the particles of the substance.
Hence, the stronger the intermolecular forces between the particles of a substance, the higher will be the melting point.
For ionic compounds, the stronger the electrostatic forces of attraction between the ions, the higher the melting point of the ionic compound will be.
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Write the electron configuration for a neutral atom of selenium!
The electronic configuration of neutral atom of selenium is
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p4.
Chemical element selenium has the symbol Se and its atomic number is 34. It comes in the category of non-metals. Selenium consists of 34 electrons distribution in its 4 orbits. Valence electrons are the electrons which are located in the outermost shell of the atom or molecule. Selenium has 6 electrons in its outermost shell
So electronic configuration of selenium define as:
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p4.
The neutral atom in selenium is Ar. so, The electronic configuration of Argon is represented as ,
1s2 2s2 2p6 3s2 3p6
The number of valence electrons is defined as the number of electrons present in the outermost shell of the atom. So, in the case of selenium, there are 6 valence electrons. so, like this we can write the electronic configuration of selenium.
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What are the chemical symbols for the elements: gold, silver, and tin respectively?.
1h, 2h, and 3h are examples of because they have different numbers of . a. isotopes; protons d. allotropes; neutrons b. isotopes; neutrons e. allotropes; protons c. isotopes; electrons
₁H, ₂H and ₃H are examples of are isotopes.
Isotopes are or more styles of atoms that have the same atomic range and role in the periodic desk, and that vary in nucleon numbers due to special numbers of neutrons of their nuclei.
An isotope is certainly one of two or more varieties of the identical chemical detail. Specific isotopes of an element have the equal range of protons in the nucleus, giving them the identical atomic variety, however a specific quantity of neutrons giving every elemental isotope a exceptional atomic weight.
Like the whole lot we see within the world, isotopes are a type of atom, the smallest unit of depend that keeps all the chemical properties of an element. Isotopes are sorts of a chemical detail with precise residences.
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The solubility of _____________ is most affected by temperature. (name of substance)
Polar solute dissolve in polar solvent and non polar solute dissolve in non polar solvent. Therefore, the solubility of sugar and salt is most affected by temperature.
What is solubility?Solubility shows the extent of solubility of a solute in solvent to make a solution. Solute is substances that is present in small amount. solvent is a substance that is present in large amount. Its SI unit is gram per liter or g/L.
Bond strength affect the solubility of a solute in solvent. weaker the bond strength is, more the solubility is. The weaker bond can be easily broken by water molecule. The solubility of sugar and salt is most affected by temperature. On increasing the temperature, the solubility of sugar increases in a solution.
Therefore, the solubility of sugar and salt is most affected by temperature.
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the isoparaffins have the same hydrogen to carbon ratios as the normal paraffins. so, why is hydrogen added to isom plant feeds?
The iso paraffins have the same hydrogen to carbon ratios as the normal paraffins because to prevent cooking.
What is paraffin?
A complex mixture of hydrocarbons that is derived specifically from the distillates of wood, coal, petroleum, or shale oil and utilized mostly in coating and sealing, candles, rubber compounding, pharmaceuticals, and cosmetics. It is a waxy, crystalline, combustible substance.
What is hydrogen?
The most fundamental member of the chemical element family is hydrogen (H), a colorless, odorless, tasteless, combustible gaseous material.
Therefore, the iso paraffins have the same hydrogen to carbon ratios as the normal paraffins because to prevent cooking.
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a student conducted the gas law reaction between mg metal and hcl as demonstrated for class, but he forgot to record the starting mass of magnesium he used. his instructor told him to use the theoretical ideal gas constant to work backwards to figure out this mass. the atmospheric pressure at the time of the experiment was 767.11 mm hg. the student noticed that he obtained 42.54 ml of h2 gas at 22.06oc. he calculated the pressure caused by the liquid level difference to be 13.27 mm hg.
Gas rule in combination: P1V1/T1 = P2V2/T2. Calculate pressure, volume, and temperature using the gas laws.
The following equation describes how magnesium reacts with hydrochloric acid: Mg(s) + 2 HCl(aq) --> MgCl 2(aq) + H 2 (g) This experiment can be used to demonstrate the production a single replacement reaction, the normal metal-acid reaction, or the reaction of hydrogen gas.
Calculation:P1 = 767.11 mm of Hg
V1 = 42.54 ml
T1 = T2 = constant
P2 = 13.27 mm hg
V2 = ?
P1V1T1 = P2V2T2
767.11 × 42.54 = V2 ×13.27
V2 = 767.11 × 42.54 / 13.27
V2 = 2454.75 ml
The liquid level difference to be 111.27
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2 na (s) 2 h2o (l) -------> 2 naoh (aq) h2(g) the hydrogen gas is collected over water at 25oc. the volume of gas is 246 ml measured at 1 atm. calculate the number of grams of na used in the reaction. (vapor pressure of water
The number of grams of Na used in the reaction is 0.414 g.
What is vapour pressure?
The tendency of a substance to transform into a gaseous or vapour state is measured by vapour pressure, which increases with temperature.
Given data:
Volume of gas, V = 246 mL = 0.246 L
Temperature, T = 25 degree C =298 K
Total pressure, PT = 1.0 atm
Pressure of water = 0.0313 atm
The vapor pressure of gas, P = PT- vapor pressure of water
=1.0 atm - 0.0313 atm
= 0.9687 atm
∴ Number of moles of gas,
n = PV / RT
= (0.9687 atm) (0.246 L) / (0.082 Latm/mol.K) (298K)
=0.238/
= 0.009 mol
According to the stoichiometric equation twomoles of Na(s) are required to produce one mole of hydrogengas
∴ Number of moles of Na(s) is required
= moles of gas * 2
= 0.009 mol *2
= 0.018 mol
Mass of Na(s) required
= moles * atomic mass ofNa
= 0.018 mol *23 g/mol
= 0.414 g
Therefore, the number of grams of Na used in the reaction is 0.414 g.
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what is the mass percent of a solution prepared by dissolving 18.9 grams of solid into 39,5 grams of water?
The mass percent of a solution prepared by dissolving 18.9 grams of solid into 39.5 grams of water is 32.4%
Mass of the solute = 18.9 gggg
Mass of the solvent = 39.5 g
Mass of the solution = Mass of the solute + Mass of the solvent = 58.4 g
The mass percent of the solute in the solution:
Mass of solute×100/mass of solution = 32.4%
What is mass?
Mass is an intrinsic belongings of a frame. It changed into historically believed to be related to the quantity of remember in a physical frame, till the discovery of the atom and particle physics. It become discovered that one-of-a-kind atoms and exclusive simple debris, theoretically with the same amount of rely, have although specific loads. Mass in cutting-edge physics has more than one definitions which might be conceptually wonderful, but physically equal. Mass may be experimentally described as a degree of the body's inertia, meaning the resistance to acceleration (change of pace) when a net force is applied.To know more about mass, click the link given below:
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The molar mass of an unknown gas was measured by an effusion experiment. It was found that the unknown gas effused at a rate of 2.5 × 10−6 mol/hr, whereas nitrogen gas effused at a rate of 3.3 × 10−6 mol/hr. The molar mass of the gas is
A) 32 g/mol.
B) 37 g/mol.
C) 24 g/mol.
D) 16 g/mol.
E) 48 g/mol.
Ideal gas law is valid only for ideal gas not for vanderwaal gas. To solve such, we need to know the relation between rate of effusion and molar mass of gases. Therefore, the molar mass of unknown gas is 48 g/mol. The correct option is option E.
What is ideal gas equation?Ideal gas equation is the mathematical expression that relates pressure volume and temperature.
Mathematically the relation between rate of effusion of gases and their molar masses can be given as:
rate of effusion of unknown gas/rate of effusion of nitrogen gas=√molar mass of nitrogen /molar mass of particular gas
Substituting all the given values we get
2.5 × 10⁻⁶÷ 3.3 × 10⁻⁶=√28÷ molar mass of unknown gas
0.56=28g÷ molar mass of unknown gas
molar mass of unknown gas =48 g/mol
Therefore, the molar mass of unknown gas is 48 g/mol. The correct option is option E.
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the meter was defined in 1963 as the length equal to 1650763.73 wavelengths of the orange red radiation emitted by the kryton-86 atom(the methr has since been redefined).what is the wavelenght of this tranision
The meter was defined in 1963 as the length equal to 1650763.73 wavelengths of the orange red radiation emitted by the kryton-86 atom. 606 nm is the wavelength.
Radiation is the name for energy that comes from a source and travels through space at the speed of light. In addition to being accompanied by an electric field and a magnetic field, this energy possesses wave-like characteristics. The term "radiation" can also refer to electromagnetic waves. Electromagnetic wave spectrum electromagnetic spectrum presented in its whole. Different types of electromagnetic radiation can be found in the natural world. Among them is visible light. Gamma rays, X-rays, and ultraviolet light are the three radiation types with the most energy. X-rays and gamma rays have a lot of energy. When they interact with atoms, they have the capacity to rob electrons from them, ionizing the atom. Protons and neutrons are mixed in unstable ways in radioactive atoms. An unstable atom will release energy on its own to move into a more stable state, which is radioactivity. The energy that is released by a radioactive atom is known as ionizing radiation. The term "radioactive isotope" refers to radioactive atoms of the same element with varying neutron counts.
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Which one of these sentences is appropriate for a formal lab report in CHM113 lab? O Three more trials were conducted and the data was recorded. O First, record the seven concentrations of the red dye which...... O The corvet was whipped with a soft tissue and then........ The error occurred because Tim spilled the solution. o We got a good yield.
O Three more trials were conducted and the data was recorded.
In chemistry, attention is the abundance of a constituent divided by the entire extent of a combination. several kinds of mathematical descriptions can be outstanding: mass awareness, molar awareness, range attention, and volume concentration.
The awareness of the solution tells you the way much solute has been dissolved within the solvent. as an example, in case you upload one teaspoon to 2 cups of water, the attention may be mentioned as 1 t salt per 2 c water. The vinegar label will file that the solution is 5% via weight acetic acid.
The concentration of a Solute. There are basic ways of reporting the concentration of a solute in a solvent, via reporting the mass of the solute in a given volume, or the variety of moles of solute in a given quantity.
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a compound is found to have an empirical formula of ch2o. what is the molecular formula when the molecular weight is 180.0 grams?
Answer:
[tex]C_{6}[/tex][tex]H_{12} O_{6}[/tex]
Explanation:
the molecular weight of the empirical formula:
12+2+16=30
to find ratio of molecular:
180/20=6
multiply the number of atoms of each element by 6 to get [tex]C_{6}[/tex][tex]H_{12} O_{6}[/tex]
ingestion of 1.0 mg of 210po could prove fatal. what is the total energy released by this quantity of 210po, assuming every atom decays? (enter your answer in scientific notation).
The total energy released by this quantity of ²¹⁰Po assuming every atom decays is 2.935×10⁶J.
What triggers atomic decay?When there is a lower-energy nuclear configuration to which an atom can transition, the atom radioactively decays. An atom's actual decay event takes place at random and is not brought on by aging or other changes over time.
²¹⁰Po releases energy by ∝-decay.
²¹⁰₈₄Po → ⁴₂He + ²⁰⁶₈₂Pb
Molar amass:
⁴₂He = 4.00151 g/mol
²⁰⁶₈₂Pb= 205.9745 g/mol.
²¹⁰₈₄Po = 209.98286 g/mol
Change of mass
Δm = 1 mol x {(4.00151g/mol + 205.9745 g/mol) - ( 209.98286 g/mol)}
Δm = -0.00685g
Δm = -0.00685g × 1kg/10³g
Δm = -6.85 X10⁻⁶ Kg
Change in energy for 1mol ²¹⁰₈₄Po
E = Δmc²
E = -6.85 X10⁻⁶ Kg × 3.00 × 10⁸m/s²
E = -6.165×10¹¹J (- ve sign indicates release of energy)
Now, number of mol of ²¹⁰₈₄Po in mg
number of mol of ²¹⁰₈₄Po in mg = 1mg×1g/10³mg×1mol/209.98286g
number of mol of ²¹⁰₈₄Po in mg = 4.76×10⁻⁶mol
Energy released by 1mg ²¹⁰Po is = 6.165×10¹¹J× 4.76×10⁻⁶mol
Energy released by 1mg ²¹⁰Po is = 2.935×10⁶J.
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