The pH of this solution is 0.207
Hello
To solve this question, we need to use the formula of solving pH of a solution from hydrogen or hydronium ion.
[tex]\begin{gathered} pH=-\text{log\lbrack{}H}_3O^+\rbrack \\ \end{gathered}[/tex]Now, we would proceed to substitute the given value and solve for it.
[tex]\begin{gathered} pH=-\log \lbrack0.62\rbrack \\ pH=0.207 \end{gathered}[/tex]NB: we did not use the value of temperature because it is not needed in this solution.
From the calculation above, the pH of this solution is 0.207
the following unbalanced equation is performed in a laboratory:Mg + HCl --> MgClz + H2If you begin with 10.0 grams of each reactant, how many grams of hydrogen gas should you expect to measure in your experiment?
Answer: 0.276g of H2 could be obtained from the reaction, considering the mass of reactants given
Explanation:
The question requires us to determine the amount of hydrogen gas (H2) that would be obtained when 10.0g of metallic magnesium (Mg) and 10.0g of chloridric acid (HCl) are reacted.
The following unbalanced chemical equation was provided:
[tex]Mg+HCl\rightarrow MgCl_2+H_2[/tex]To solve this problem, we'll need:
1) obtain the balanced chemical equation;
2) determine the limiting reactant considering the amount of reactants used and the stoichiometry of the reaction;
3) calculate the mass of hydrogen gas produced, considering the limiting reactant
1) Balancing the chemical equation
From the unbalaced chemical equation, we can see that there is the same amount of Mg on both sides of the equation, but we need to adjust the amount of H and Cl atoms.
There are 2 Cl atoms and 2 H atoms on the right side, and 1 Cl and 1 H atom on the left side, thus we can adjust the coefficient of HCl from 1 to 2 to adjust these elements. The balanced chemical equation can be written as:
[tex]Mg+2HCl\rightarrow MgCl_2+H_2[/tex]2) Determining the limiting reactant
Now that we know the balanced chemical equation, we can say that 2 moles of HCl are necessary to react with 1 mol of Mg. Thus, we can write:
1 mol Mg ----------------------- 2 mol HCl
From this stoichiometric relation, we can calculate the amount of HCl that would be necessary to react with 10.0 g of Mg.
First, let's determine the amount of moles of Mg contained in 10.0g of this metal and the number of moles of HCl in 10.0g of this acid:
[tex]\begin{gathered} number\text{ of moles = }\frac{mass\text{ of sample \lparen g\rparen}}{molar\text{ mass \lparen g/mol\rparen}} \\ \\ number\text{ of moles of Mg = }\frac{10.0g}{24.31g/mol}=0.411mol\text{ of Mg} \\ \\ number\text{ of moles of HCl = }\frac{10.0g}{36.46g/mol}=0.274mol\text{ of HCl} \end{gathered}[/tex](the atomic mass of Mg is 24.31 amu, which is numerically identical to its molar mass, 24.31 g/mol, and the molar mass of HCl is 36.4g g/mol)
Therefore, 0.411 moles of Mg and 0.274 moles of HCl were used in the reaction.
Next, we can determine how many moles of HCl would be necessary to react with 0.411 moles of Mg:
1 mol Mg ----------------------- 2 mol HCl
0.411 mol Mg ----------------- x
Solving for x, we have that 0.822 moles of HCl would be necessary to react with the given amount of Mg. Since the amount actually used of HCl (0.274 mol) is smaller than the necessary amount, we can say that HCl is the limiting reactant.
3) Calculating the mass of H2 obtained
Using the limiting reactant and the stoichiometry of the reaction, we can determine the amount of H2 that could be produced.
From the balanced chemical equation, we know that 2 moles of HCl are necessary to produce 1 mol of H2. Thus, we can write:
2 mol HCl ------------------- 1 mol H2
0.274 mol HCl ------------ y
Solving for y, we have that 0.137 moles of H2 would be obtained.
We can convert the number of moles of H2 to its correspondent mass as it follows (the molar mass of H2 is 2.016 g/mol):
[tex]\begin{gathered} number\text{ of moles = }\frac{mass\text{ of sample \lparen g\rparen}}{molar\text{ mass \lparen g/mol\rparen}}\rightarrow mass\text{ of sample = number of moles}\times molar\text{ mass} \\ \\ mass\text{ of H}_2=0.137mol\times2.016g/mol=0.276g \end{gathered}[/tex]Therefore, 0.276g of H2 could be obtained from the reaction, considering the mass of reactants given.
how to the chemical properties of sodium oxide allow them to be used
Answer:
Explanation:
Sodium oxide is an inorganic compound that has sodium and oxygen as its constituent
Majorly, its applications include in the ceramic industry and also aerounautical applications (for making light weight parts of air crafts)
So what exact properties of this oxide conform these properties?
The property here is that it is insoluble in water and other aqueous solutions
Furthermore, due to its ionic conductivity property, it finds use in applications like in the making of fuel cells.
part A: A very flexible helium-filled balloon is released from the ground into the air at 20. ∘C . The initial volume of the balloon is 5.00 L , and the pressure is 760. mmHg . The balloon ascends to an altitude of 20 km , where the pressure is 76.0 mmHg and the temperature is − 50. ∘C . What is the new volume, V2 , of the balloon in liters, assuming it doesn't break or leak?part B: Consider 4.60 L of a gas at 365 mmHg and 20. ∘C . If the container is compressed to 3.00 L and the temperature is increased to 33 ∘C , what is the new pressure, P2 , inside the container? Assume no change in the amount of gas inside the cylinder.
ANSWER
The volume of the gas is V2 is 38.1 liters
EXPLANATION
Given that;
[tex]\begin{gathered} \text{ The initial temperature of the balloon is 20}\degree C \\ \text{ The initial volume of the balloon is 5.0L} \\ \text{ The initial pressure of the balloon is 760 mmHg} \\ \text{ The final temperature of the balloon is - 50}\degree C \\ \text{ The final pressure of the balloon is 76 mmHg} \end{gathered}[/tex]To find the final volume of the balloon, follow the steps below
Step 1; Write the general gas law equation
[tex]\text{ }\frac{P1\text{ }\times\text{ V1}}{T1}\text{ }=\text{ }\frac{\text{ P2}\times\text{ V2}}{T2}[/tex]Step 2; Convert the temperature to kelvin
[tex]\begin{gathered} \text{ t1 }=\text{ 20}\degree C \\ \text{ T }=\text{ t }+\text{ 273.15} \\ \text{ T }=\text{ 20 + 273.15} \\ \text{ T = 293.15K} \\ \\ t2\text{ }=\text{ -50}\degree C \\ \text{ T = -50 + 273.15} \\ \text{ T}=\text{ 223.15K} \end{gathered}[/tex]Step 3; Substitute the given that into the formula given
[tex]\begin{gathered} \text{ }\frac{760\times5}{293.15}\text{ }=\text{ }\frac{76\text{ }\times\text{ V2}}{223.15} \\ \text{ cross multiply} \\ \text{ 760 }\times\text{ 5}\times\text{ 223.15 }=\text{ 76 }\times\text{ v2}\times\text{ 293.15} \\ \text{ 847970 }=\text{ 22, 279.4 }\times\text{ v2} \\ \text{ divide both sides by 22294} \\ \text{ }\frac{8479890}{222794}=\text{ }\frac{22294\text{ V2}}{22294} \\ \text{ v2 }=\text{ 38.1 Liters} \end{gathered}[/tex]Hence, the volume of the gas is V2 is 38.1 liters
How many moles are there for silver that are produced
0.96moles
Explanations:Given the reaction between Magnessium and silver nitrate expressed as:
[tex]Mg(s)+2AgNO_3(aq)\rightarrow Mg(NO_3)_2(aq)+2Ag(s)[/tex]Given the following parameter
Moles of Magnessium at the start = 0.480moles
According to stoichiometry, 1mole of magnessium produce 2 moles of silver. Hence the moles of silver that is produced if 0.48moles of Mg reacted is given as:
[tex]\begin{gathered} mole\text{ of Ag = 2}\times0.48moles \\ mole\text{ of Ag =}0.96moles \end{gathered}[/tex]Hence the moles of silver that will produced is 0.96moles
Perform the following operationand express the answer inscientific notation.7.00x105 – 5.00x104-[ ? ]x10[?]Coefficient (green)Exponent (yellow)Enter
The answer is 6.5x10^5
Coefficient = 6.5
Exponent = 5
How would this need to be answered? I don’t know how to do any of this.
Step 1
It is known that the rate law can be written as follows:
Given the reaction: X + Y => Products (completed and balanced), the rate of the reaction would be:
[tex]rate\text{ = k }\lbrack X\rbrack^a\lbrack Y\rbrack^b[/tex]k = rate constant
[X] = concentration of reactant X
[Y] = concentration of reactant Y
a, b = are the order of the reaction with respect to X and Y (they are not necessarily the coefficients of the reaction)
---------
Step 2
Information provided:
k
First order in A
Zero order in B
Second order in C
Therefore, the rate law:
Answer:
[tex]\begin{gathered} rate\text{ =k x }\lbrack A\rbrack^1x\text{ }\lbrack B\rbrack^0x\text{ }\lbrack C\rbrack^2 \\ rate\text{ = k x }\lbrack A\rbrack\text{ x }\lbrack C\rbrack^2 \end{gathered}[/tex]In the reaction 2 HgO --> 2 Hg + O2, how many moles of O2 are produced when 3.4 moles of HgO are decomposed?
In order to find the number of moles of O2 in this reaction we need to set up the properly balanced equation, which the question already gave us:
2 HgO -> 2 Hg + O2
From this equation we see that the molar ratio between HgO and O2 is 2:1, which means that for every 2 moles of HgO reacting we will end up having 1 mol of O2 as product, now what if we have 3.4 moles of HgO:
2 HgO = 1 O2
3.4 HgO = x O2
x = 1.7 moles of O2
No clue on how to do these or how to show all my work and unit cancellations.
Question 16:
We are given the following balanced equation: (Remember to always balance the equation)
[tex]2HNO_3+Mg(OH)_2\rightarrow Mg(NO_3)_2+2H_2O[/tex]We are also told that Mg(OH)2 is in excess, meaning HNO3 is the limiting reactant, we will use its moles to find the number of moles of Mg(NO3)2, then we can convert that to mass.
The ratio between HNO3 and Mg(NO3)2 is 2:1
Therefore the number of moles of Mg(NO3)2 = 8.00 mol x (1/2) = 4.00 mol
Now we can convert the number of moles of Mg(NO3)2 to mass: molar mass of Mg(NO3)2 = 148,3 g/mol
[tex]\frac{8.00\text{ mol x 1}}{2}\text{ x }\frac{148.3\text{ g}}{1\text{ mol}}\text{ = 592 g}[/tex]So the mol will cancel the mol, then you will be left with g.
A balloon originally has 0.100 moles of helium and has a volume of 0.500 L. If 0.530 grams of He are added to the balloon, what will the new volume be, in L?
The new volume of the balloon if 0.530 grams of He are added to the balloon is 1.16 L
What is the number of moles of helium added?The number of moles of helium added is determined as follows:
The final volume of the balloon if 0.20 moles of gas are added will be 1.62 L.
Moles = mass / molar mas
molar mass of helium = 4 g/mol
Moles fo helium added = 0.530 / 4
moles of helium added = 0.1325 moles
The final volume is determined using the ideal gas equation as follows:
PV = nRT
Where;
P is pressureV is volumen is the number of moles of gasR is molar gas constant = 0.082 atm.L/K.molInitial volume, V₁ = 0.50 L
Initial mole of gas, n₁ = 2.50 mol
With pressure and temperature held constant:
Final moles of gas, n₂ = 0.100 + 0.1325
n₂ = 0.2325 mols
Final volume, V₂ = n₂ * V₁ / n₁
V₂ = 0.2325 * 0.5 / 0.1
V₂ = 1.16 L
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How many moles are in 28.87 grams of Ec3H305?Ec has a molar mass of 31.79 grams/molè.(Hint: You need to determine the molar mass of Ec3H305 to solve this problem).
We have the compound Ec3H3O5. I assume that the compound Ec is an unknown compound, but we are given the molar mass of the compound Ec.
The molar mass of the molecule will be equal to the sum of the masses of each element multiplied by the number of times that it is repeated in the molecule, to make it clearer we can make the following table:
The molar mass of the molecule will be equal to 146.39g/mol, therefore the moles in 28.87 grams will be:
[tex]\begin{gathered} \text{Mol }_{}Ec_3H_3O_5=GivengEc_3H_3O_5\times\frac{1molEc_3H_3O_5}{MolarMass,gEc_3H_3O_5} \\ \text{Mol}Ec_3H_3O_5=28.87gEc_3H_3O_5\times\frac{1molEc_3H_3O_5}{146.39gEc_3H_3O_5}=0.20molEc_3H_3O_5 \end{gathered}[/tex]In 28.87g of Ec3H3O5 there are 0.20molEc3H3O5
The minimum amount of energy needed for a reaction to take place is called the _____________.A. primer energyB. induction thresholdC. reaction thresholdD. activation energy
In a chemical reaction, there is a lot of energy involved, both being added for the reaction to occur and also being released, but for a reaction to take place, we need the so-called Activation Energy, which is the minimum amount of energy required for the compounds to react. Letter D is correct
PLEASE HELP - 100 PTS AND BRAINLIEST
Provide an example of each of the following mixtures and state whether it is a homogeneous or heterogeneous mixture. Support your answers.
a) A mixture of a solid and a liquid.
b) A mixture of two gases.
c) A mixture of two liquids.
d) A mixture of two solids.
Answer (cuz i found it xD)
a) Dirt and water [mud] (Heterogenous - mud can settle down at the bottom and leaving the mixture with much less mud at the top of the container than at the bottom)
b) Smoke and fog [smog] (Heterogenous - Smog often carries around a lot of different particles other than just smoke and fog. These are not the same particles as another smog cloud a few miles over)
c) Milk and chocolate syrup [chocolate milk] (Heterogenous - The chocolate syrup can settle at the bottom leaving different amounts on both top and bottom of the mixture.)
d) Copper and Zinc [brass] (Homogenous - Brass is always copper + zinc, though the ratios can vary greatly. If it were heterogenous we would see variety in things such as color, which we don't)
Example of each of the following mixtures and state whether it is a homogeneous or heterogeneous mixture
A mixture of a solid and a liquid - Dirt and water [mud] (Heterogenous - mud can settle down at the bottom and leaving the mixture with much less mud at the top of the container than at the bottom)
A mixture of two gases - Smoke and fog [smog] (Heterogenous - Smog often carries around a lot of different particles other than just smoke and fog. These are not the same particles as another smog cloud a few miles over)
A mixture of two liquids - Milk and chocolate syrup [chocolate milk] (Heterogenous - The chocolate syrup can settle at the bottom leaving different amounts on both top and bottom of the mixture.)
A mixture of two solids - Copper and Zinc [brass] (Homogenous - Brass is always copper + zinc, though the ratios can vary greatly. If it were heterogenous we would see variety in things such as color, which we don't)
Mixture is the compound made up of two or more chemical component which are not chemically linked called as mixture
Here mixture of solid and liquid is dirt and water means water is the liquid whereas dirt is the solid and mixture of two gases are smoke and fog this two are gases that's why it is called mixture of gases and mixture of two liquid are milk and chocolate syrup because they are syrup that's why they are mixture of two liquid and mixture of two solid are copper and zinc copper is also the solid and zinc is also the solid that's why it is the mixture of two solid
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5. You have 2 Liters of a 5 M Solution of H3PO4. How many grams are present?
Answer
979.94 grams
Explanation
Given:
Volume of solution = 2 L
Molarity = 5 M
What to find:
The mass in grams of H3PO4 present in the solution.
Step-by-step solution:
The first step is to calculate the moles of H3PO4 present using the molarity formula below:
[tex]\begin{gathered} Molarity=\frac{Moles}{Volume\text{ }in\text{ }L} \\ \\ \Rightarrow Moles=Molarity\times Volume\text{ }in\text{ }L \end{gathered}[/tex]Put the values of the given parameters into the formula to get the moles:
[tex]Moles=5M\times2L=10\text{ }mol[/tex]The moles of H3PO4 present in the solution = 10 mol.
Therefore, the mass present can be determined using the mole formula:
[tex]\begin{gathered} Moles=\frac{Mass\text{ }in\text{ }grams}{Molar\text{ }mass} \\ \\ \Rightarrow Mass\text{ }in\text{ }grams=Moles\times Molar\text{ }mass \end{gathered}[/tex]From the periodic table, the molar mass of H3PO4 can be known as 97.994 g/mol.
So putting moles = 10 mol and molar mass = 97.994 g/mol, then the mass is:
[tex]Mass=10\text{ }mol\times97.994\text{ }g\text{/}mol=979.94\text{ }grams[/tex]Therefore, the mass in grams of H3PO4 present in the solution = 979.94 grams.
Study the phase diagram of a saltwater solution compared to pure water.
Answer
The solute is more volatile when compared to the solvent.
Explanation
From the diagram, the solute is more volatile when compared to the solvent. This is because a volatile solute (i.e., a solute that has a vapor pressure of its own) will contribute to the vapor pressure above a solution in which it is dissolved.
Hence, the correct option is: The solute is more volatile when compared to the solvent.
Which factors affect electronegativity?
A. Atomic radius and number of unshielded protons
B. Number of electrons and atomic radius
C. Number of unshielded electrons and density of the element
D. Density of the element and atomic radius
The factors that affect electronegativity is Number of electrons and atomic radius. Option A
What is electronegativity?The term electronegativity has to do with the the bonding situation between two atoms. In this situation, the electrons of the bond would be closer to one of the atoms than the other. In that case, there would be an unequal sharing of the electrons.
There are several facts that affect the electronegativity of an atom and these are the things that determine how electronegative that any particular atom would be.
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mno2+4hcl=cl2+mncl2+2h2o if you were given 145 g of HCl how many grams of MnCl2 Could you Theoretically produce if you reacted with the excess MnO2
The first step is to use the molecular weight of HCl to convert 145g to moles of HCl (mw=36.458g/mol):
[tex]145g\cdot\frac{mol}{36.458g}=3.97mol[/tex]Now, use the ratio of the coefficients of MnCl2 to HCl, to find how many moles of MnCl2 are produced with this amount of HCl:
[tex]3.97molHCl\cdot\frac{1molMnCl_2}{4molHCl}=0.9925molMnCl_2[/tex]Use the molecular weight of MnCl2 to convert the amount of moles produced to grams:
[tex]0.9925molMnCl_2\cdot\frac{125.844g}{molMnCl_2}=124.9g[/tex]124.9g of MnCl2 are produced.
Hey I miss my dad but I’m watching it and
Firstly what you need to know is that metallic bonds form in metallic substances. The elements that form these bonds are found on the left of the periodic table. So the metallic bonds form when the charge when the charge is spread over a wide distance when comparing to the size of the atom. These bonds occur between metals like zinc, and since they are in a form of solids, their atoms are tightly packed together.
The formation of metallic bonds occur because the metals exchange electrons, this electron exchange occur in different spatial directions.
The atomic mass of copper (Cu) is 63 546 amu, the atomic mass of sulfur (S) is 32.065, and the atomic mass of oxygen (O) is 15.999 amu. Which molar mass is correct for copper sulfate (CuSO4)? (1 point) O 446.440 g/mol O 225.802 g/mol O 159.607 g/mol O 111.610 g/mol
The molar mass for copper sulfate (CuSO₄), given that the atomic mass of sulfur (S) is 32.065, and the atomic mass of oxygen (O) is 15.999 amu, is 159.607 g/mol
How do I determine the molar mass of CuSO₄?The molar mass of a compound is the sum of the individual atomic masses of the various elements that makes up the compound.
With the above information, we can obtain the molar mass for copper sulfate (CuSO₄) as follow:
Atomic mass of Copper (Cu) = 63.546 amuAtomic mass of sulfur (S) = 32.065 amuAtomic mass of oxygen (O) = 15.999 amuMolar mass of copper sulfate (CuSO₄) =?Molar mass of CuSO₄ = 63.546 + 32.065 + (4 × 15.999)
Molar mass of CuSO₄ = 63.546 + 32.065 + 63.996
Molar mass of CuSO₄ = 159.607 g/mol
Thus, we can conclude that the molar mass for copper sulfate (CuSO₄) is 159.607 g/mol
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Answer: 159.607 g/mol
Explanation:
Which statement is true concerning the structure and its functional group?Group of answer choicesCH3CH2OH is a caboxylic acidCH3CH2NH2 is an amineCH3CH2COOH is an esterCH3CH2SH is an ethernone of the above
Amine:
Amines are molecules that contain carbon-nitrogen bonds. The nitrogen atom in an amine has a lone pair of electrons and three bonds to other atoms, either carbon or hydrogen.
Functional group: NH2-R primary amine; NH-R secondary amine; N-R tertiary amine.
CH3CH2NH2 is the only one true. This is ethylamine
CH3CH2OH: OH- alcohol group
CH3CH2COOH: -COOH the functional group is a carboxyl group from a carboxylic acid.
CH3CH2SH: SH- this functional group is referred to as either a thiol group or a sulfhydryl group.
Answer: CH3CH2NH2 is an amine
7 While grocery shopping on a Sunday afternoon, Jonas sees a pot roast that has been marked down. The pot roast has an expiration date set for Tuesday, but Jonas wants to host dinner for friends on Friday night. Which would be the BEST way for Jonas to make sure the pot roast is safely prepared? A. Cook the pot roast on Sunday and refrigerate it until Friday night. B. Buy the pot roast and keep it in the refrigerator until Friday night. C. Freeze the pot roast until he is ready to prepare it Friday night. D. Keep the pot roast in the refrigerator but cook it on Tuesday.
The best way for Jonas to make sure the pot roast is safely prepared is Freeze the pot roast until he is ready to prepare it Friday night
Pot roast is the browned meat cooked with the vegetable in a covered pot
So according to the given data while grocery shopping on a Sunday afternoon, jonas sees a pot roast that has been marked down the pot roast has an expiration date set for Tuesday, but Jonas wants to host dinner for friends on Friday night then the best way for Jonas to make sure the pot roast is safely prepared is Freeze the pot roast until he is ready to prepare it Friday night because he wants to host dinner for friends on Friday night then he bought earlier then it would be spoiled because is is a meat that's why the correct option is C bought the pot roast and freeze it until Friday night and when he want then make it
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19.When a compound is added to water only a few of its molecules dissociate to produce hydrogen ions. It is a...Select one:a. strong acid.b. weak acid.c. strong base.d. weak base.
ANSWER
Weak acid ------ option B
EXPLANATION
Acid is divided in strong and weak acid
Generally, acid can be defined as a substance that will produce hydrogen ions as the only positive ions when dissolved in water.
Strong acid will dissolved completely in water to give hydrogen ions. Example of a strong acid is Hydrogen
Weak acid will dissolved partially in water to give hydrogen ions
Hence, a compound that will give only few of its molecules to produce hydrogen ions when dissolved in water is called a weak acid
Therefore, the correct answer is weak acid
Convert 91 mL to µL and write the answer in scientific notation.
ANSWER
[tex]\text{ 91000}\mu L[/tex]EXPLANATION
Given that;
The volume is 91mL
Let x represent the volume in microliter
Recall, that 1mL is equivalent to 1000 microliters
[tex]\begin{gathered} \text{ 1mL }\rightarrow\text{ 1000}\mu L \\ \text{ 91mL }\rightarrow\text{ x}\mu L \\ \text{ cross multiply} \\ \text{ 1mL }\times\text{ x}\mu L\text{ = 1000}\mu L\text{ }\times\text{ 91mL} \\ \text{ isolate x} \\ \text{ x}\mu L\text{ = }\frac{1000\mu L\times91\cancel{mL}}{1\cancel{mL}} \\ \\ \text{ x }\mu L\text{ = }1000\text{ }\times\text{ 91} \\ \text{ x = 91000}\mu L \end{gathered}[/tex]Hence, the answer is 91000 microliters
Convert -4 degrees F to K.[?] KTin KelvinEnterQopyright © 2003-2022 dcelins Corporation. All Riss Reserved
From the question given, we are to convert -4⁰F to K
The standard value of ⁰F to K is
1⁰F = 255.93K
-4⁰F = x
Let's solve for -4⁰F
[tex]-4+255.93K=253.15K[/tex]From the calculations above, -4⁰F is equal to 253.15K
A 2.5 M solution has an initial volume of 150.0 mL. The solution is diluted to a final volume of 300.0 mL. What is the new concentration?
The final or new concentration of a solution that was diluted to 300mL is 1.25M.
How to calculate concentration?The final concentration or molarity of a solution can be calculated using the following formula;
CaVa = CbVb
Where;
Ca = initial concentrationCb = final concentrationVa = initial volumeVb = final volumeAccording to this question, 2.5 M solution has an initial volume of 150.0 mL. The solution is diluted to a final volume of 300.0 mL. The final concentration can be calculated as follows:
2.5 × 150 = Cb × 300
375 = 300Cb
Cb = 1.25M
Therefore, the 1.25M is the new concentration of the solution.
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What technique can be applied in the study of the
universe and the composition of space?
A. analytical
B. mathematical
C. astrological
D. spectrophotometer
For each of the following solutions, calculate the specified value.Calculate the number of grams of 3.9 % (m/m) NaCl solution that contains 7.20 g of NaCl .Express your answer to two significant figures and include the appropriate units.
Step 1
It is known that a value of "x" % (m/m) means:
"x" grams in 100 grams of solution
-------------
Step 2
Information provided:
3.9 % (m/m) of NaCl solution
-------------
Step 3
Procedure:
According to step 1, it is known that:
3.9 % (m/m) => 3.9 g NaCl in 100 g
--
Now,
3.9 g NaCl ------------ 100 g of solution
7.20 NaCl ------------- X
X = 7.20 NaCl x 100 g of solution/3.9 g NaCl
X = 184.61 g = 180 g approx.
Answer: 180 g of solution
A homogeneous mixture consist ofGroup of answer choicesa solutea solventneitherboth
Explanation:
Mixtures can be homogeneous or heterogeneous.
Homogeneous mixtures have a distinct phase. Heterogeneous mixtures have two or more distinct phases.
A solution is a homogeneous mixture between two or more substances. The process used to obtain this mixture is called dissolution.
A solution is always formed by the solute and the solvent.
Answer: both
Read this excerpt from "The World on Turtle's Back."
In the Sky-World was a man who aimed to please his pregnant wife. His wife told him that she wanted some bark from the roots of the Great Tree. Though the husband knew it was wrong, he dug up the roots of the tree for his wife. In doing so, he broke a hole in the floor of the Sky-World, and was shocked to find empty space underneath. He was terrified and told his wife what he did.
Which words in this excerpt support the idea that the husband was very devoted to his wife?
a man who aimed to please his pregnant wife
the husband knew it was wrong
he broke a hole in the floor of the Sky-World
He . . . told his wife what he did
The words in this excerpt which support the idea that the husband was very devoted to his wife is "the husband knew it was wrong".
What is an excerpt?
An excerpt is described as a short extract from a film, broadcast, or piece of music or writing.
From the excerpt above, we can conclude that the husband was devoted to his wife by digging up the roots of the tree for his wife even when he knew it was wrong to do do and so he broke a hole in the floor of the Sky-World, and was shocked to find empty space underneath.
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Thoroughly compare the way energy is produced in a fission nuclear power plant versus how energy is produced by fusion in stars (such as our sun). Make sure to include similarities and differences between fission and fusion.
Answer
Nuclear fusion and nuclear fission are different types of reactions that release energy due to the presence of high-powered atomic bonds between particles found within a nucleus.
In fission, an atom is split into two or more smaller, lighter atoms. Fusion, in contrast, occurs when two or more smaller atoms fuse together, creating a larger, heavier atom.
Fission reaction does not normally occur in nature.But fusion occurs in stars, such as the sun.
Fission produces many highly radioactive particles.Few radioactive particles are produced by the fusion reaction, but if a fission "trigger" is used, radioactive particles will result from that.
A critical mass of the substance and high-speed neutrons are required in fission. In contrast, a high density, high-temperature environment is required in a fusion reaction.
In a fission reaction, it takes little energy to split two atoms. Extremely high energy is required to bring two or more protons close enough that nuclear forces overcome their electrostatic repulsion in a fusion reaction.
In terms of released energy, the energy released by fission is a million times greater than that released in chemical reactions; but lower than the energy released by nuclear fusion. On the other hand, the energy released by fusion is three to four times greater than the energy released by fission.
One class of nuclear weapons is a fission bomb, also known as an atomic bomb or atom bomb. One class of nuclear weapons is the hydrogen bomb, which uses a fission reaction to "trigger" a fusion reaction.
In terms of energy production, fission is used in nuclear power plants.While fusion is an experimental technology for producing power.
Finally, Uranium is the primary fuel used in nuclear power plants.Hydrogen isotopes (Deuterium and Tritium) are the primary fuel used in experimental fusion power plants.
In a compound that contains monatomic ions, which of the following gets named first?the nonmetalthe metalthe anionthe roman numeral of the valence number
If we given a compound such as K₂SO₄, this compound would be named as such that the metal comes first, followed by the anion or non-metal and lastly roman numeral of the valence number.
So in naming this compound, we would go as
Potassium tetraoxosulphate (VI)
Where potassium is the metal, tetraoxosulphate is the anion and lastly the roman number of the valence electron.
Another example would would be MgCl₂
The name of this compound is magnesium chloride.
In this compound, the metal is named first as well, followed by the non-metal. The roman numeral of the valence electron is not written here because the value is 1 and we don't need to write it.
Another example of the above is CaBr
This compound is calcium bromide
The metal is named first and then the non-metal. The roman numeral of the valence number is not written becaue it is also 1.
Lastly example would be NaNO₃
This compound is named as sodium trioxonitrite(v)
The metal is also named first, followed by the anion and lastly the roman numeral of the valence number.
From the explanation above, the answer to this question is The Metal