Common transparent materials used to make cuvettes include optical glass, quartz, and transparent plastic. All of these materials seem to be completely transparent and appropriate for all types of absorbance tests at first glance.
What position do cuvettes take in a spectrophotometer?
Each cuvette has markings to allow for appropriate placement in the sample holder. When taking measurements, the mark, which is at the top of the cuvette, must face the spectrophotometer's front.
What does the UV/VIS spectrophotometer utilize a cuvette for?
Test tubes in the shape of a cuvette. They serve the same purpose as regular test tubes: to hold aqueous solutions. Chemical reactions can be aided by regular test tubes. Cuvettes, on the other hand, are employed in UV-Vis spectrophotometers or fluorometers to measure the transmittance or absorption of light at a specific wavelength.
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Experimental data for the reaction
2NO2(g)+F2(g)→2NO2F(g)2NO2(g)+F2(g)→2NO2F(g)
are given in the table below.
[NO2](M)[NO2](M) [F2](M)[F2](M) Initial rate (M/s)(M/s)
0.100 0.100 0.026
0.200 0.100 0.051
0.200 0.200 0.103
0.400 0.400 0.411
a) Enter an expression for the reaction rate law.
Express your answers in terms of kk, [NO2][NO2], and [F2][F2].
The reaction is: 2NO2(g) + F2 (g) =2NO2F (g)
Let us consider the order of the reaction i.e., a and b with respect to NO2 and F2.
So, the rate Law is: Rate = K [NO2] a [F2] b ------- (i)
Where, K is the rate law constant
Now, for experiment no. 1
Rate = 0.026 = K (0.100) a (0.100) b ----------(ii)
for experiment no. 2
Rate = 0.051 = K (0.200) a (0.100) b ----------(iii)
for experiment no. 3
Rate = 0.103 = K (0.200) a (0.200) b ----------(iv)
for experiment no. 4
Rate = 0.411 = K (0.400) a (0.400) b ----------(v)
Now, dividing equation no. – (ii) by (i), we get
0.026/0.051 = {K (0.100) a (0.100)b} / K (0.200) a (0.100) b
1/2 = (1/2) a
a = 1
Now, dividing equation no. – (iii) by (ii), we get
0.051/0.103 = {K (0.200) a (0.100) b} / K (0.200) a (0.200) b
1/2 = (1/2) b
b = 1
Hence, the rate law expression is –
Rate = K [NO2]1 [F2]1
Rate = K [NO2] [F2]
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what volume of I2 gas forms when 21 L Cl2 reacts at STP
At STP, the volume of one mole of any gas is 22.4 L. As per the given reaction, one mole or 22.4 L of Cl₂ gas gives one mole or 22.4 L of I₂ gas. Thus, 21 L of Cl₂ gives 21 L of I₂ gas.
What is molar volume?The volume occupied by one mole of a substance is called its molar volume. At standard temperature and pressure condition (STP), one mole of every substance contains 22.4 L .
One mole of Cl₂ gas at STP contains 22.4 L similarly one mole of I₂ contains 22.4 L. As per the reaction, one mole of Cl₂ give one mole of l₂. Thus, both are having equal volumes in this reaction.
Therefore, 21 L Cl₂ reacts to give 21 L l₂ at STP .
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Answer: 21 L i2 at STP
Explanation:
One mole of Cl₂ gas at STP contains 22.4 L similarly one mole of I₂ contains 22.4 L. As per the reaction, one mole of Cl₂ give one mole of l₂. Thus, both are having equal volumes in this reaction.
Therefore, 21 L Cl₂ reacts to give 21 L l₂ at STP .
assign the protons in the nmr spectrum below. for each peak, list the peak location in ppm, and the protons responsible for it (labeled a-e in the structure). isoamyl acettate
List the peak location in ppm, and the protons responsible for it labeled a-e in the structure is banana oil.
What is ppm ?
Reduction, which involves the exchange of electrons between species, is the process of gaining electrons or reducing an element's oxidation state in a chemical reaction. When the chemical reaction known as reduction occurs, the number of electrons that are bound to a single atom or a group of related atoms rises.
What is protons ?
Positively charged subatomic particles called protons fall into this category. The strong nuclear force is responsible for the protons' interconnection in an atom's nucleus. Subatomic particles without charge include neutrons (they are neutral).
Therefore, list the peak location in ppm, and the protons responsible for it labeled a-e in the structure is banana oil.
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which of the following allows for atp to be produced with the electron transport chain? answer acetyl-coa oh- concentration gradient h concentration gradient nad i don't know yet
The Krebs cycle produces molecules necessary for function of the electron transport chain.
What is electron transport chain ?
The oxidative phosphorylation process, also known as oxidative phosphorylation, is a comprehensive system that produces ATP by coupling redox processes through a sequence of four protein complexes known as the electron transport chain. Cellular respiration and photosynthesis both involve it in mitochondria.
What is Krebs cycle?
The Krebs cycle, also known as the TCA cycle or the citric acid cycle, is a sequence of enzyme-catalyzed processes taking place in the mitochondrial matrix where acetyl-CoA is oxidized to produce carbon dioxide and coenzymes are reduced to produce ATP in the electron transport chain.
Therefore, the Krebs cycle produces molecules necessary for function of the electron transport chain.
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What is the formula mass of iron(II) chloride? 101.55
126.75
O 147.17
165.10
175.70
Answer:
The formula mass of iron(II) chloride is 162.21 g/mol.
a sealed container holds 0.0135 mol CO2 gas what mass of Na2CO3 is needed to generate the CO2
The mass of Na₂CO₃ needed to generate 0.0135 mole of CO₂ is 1.431 grams
How do I determine the mass of Na₂CO₃ needed?We'll begin by obtaining the mole of Na₂CO₃ that reacted to produce 0.0135 mole of CO₂
Na₂CO₃ + 2HCl -> 2NaCl + H₂O + CO₂
From the balanced equation above,
1 mole of CO₂ was obtained from 1 mole of Na₂CO₃
Therefore,
0.0135 mole of CO₂ will also be obtained from 0.0135 mole of Na₂CO₃
Now, we shall determine the mass of Na₂CO₃ needed for the reation. Details below:
Mole of Na₂CO₃ = 0.0135 moleMolar mass of Na₂CO₃ = 106 g/molMass of Na₂CO₃ = ?Mole = mass / molar mass
0.0135 = Mass of Na₂CO₃ / 106
Cross multiply
Mass of Na₂CO₃ = 0.0135 × 106
Mass of Na₂CO₃ = 1.431 grams
Therefore, the mass of Na₂CO₃ needed is 1.431 grams
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the atomic masses of nitrogen-14, titanium-48, and xenon-129 are 13.999234 amuamu , 47.935878 amuamu , and 128.904779 amuamu , respectively. part a calculate the nuclear masses of all three isotopes.
a). the nuclear masses of nitrogen-14 is 14.11154 amu
b). the nuclear masses of titanium-48 is 48.38523 amu
c). the nuclear masses of xenon-129 is 130.042455 amu
Define nuclear mass.
The formula for calculating nuclear mass is M=ZM (p)+(A-Z)M (n), where M (p) and M (n) refer to the mass of protons and neutrons, respectively. Nuclear mass is the total mass of all the nucleons represented inside the nucleus.
a). Given, atomic mass of 7N14= 13.999234 amu
We, know
Mass of proton= 1.00727 amu
Mass of neutron= 1.008665 amu
A nucleus contains only neutron and proton. N14 nucleus contains 7 protons and 7 neutrons that is 14 nucleons.
Therefore, the total mass of protons and neutrons= nuclear mass
= (7*1.00727 amu) + (7*1.008665 amu)= 14.11154 amu
b). Given, atomic mass of 22Ti48= 47.935878 amu
We, know
Mass of proton= 1.00727 amu
Mass of neutron= 1.008665 amu
A nucleus contains only neutron and proton. N48 nucleus contains 22 protons and (48-22) =26 neutrons that is 48 nucleons.
Therefore, the total mass of protons and neutrons= nuclear mass
= (22*1.00727 amu) + (26*1.008665 amu)= 48.38523 amu
c). Given, atomic mass of 54Xe129= 128.904779 amu
We, know
Mass of proton= 1.00727 amu
Mass of neutron= 1.008665 amu
A nucleus contains only neutron and proton. N48 nucleus contains 54 protons and (129-54) =75 neutrons that is 129 nucleons.
Therefore, the total mass of protons and neutrons= nuclear mass
= (54*1.00727 amu) + (75*1.008665 amu)= 130.042455 amu
Therefore, a). the nuclear masses of nitrogen-14 is 14.11154 amu
b). the nuclear masses of titanium-48 is 48.38523 amu
c). the nuclear masses of xenon-129 is 130.042455 amu.
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a chemical equation is a notation in which chemical formulas express the identities and their coefficients express the quantities of substances involved in a chemical reaction.
Chemical equation is a representation of a reaction that brings in chemical changeschanges. It is represented in word form and in symbols.
What is a chemical equation?
Chemical equations use symbols to represent factors such as the direction of a reaction and the physical states of the reacting entities. Chemical equations were first formulated by the French chemist Jean Beguin in 1615.Chemical reactions can be represented on paper using chemical equations, an example of which is shown below (for the reaction between hydrogen gas and oxygen gas to form water).In the above example, it can be observed that the reacting entities are written on the left-hand side, while the products that form from chemical reactions are written on the right-hand side of the chemical equation.To know more about chemical equations, click the link given below:
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Question 6
How many moles is equal to 58.24 grams of fluorine gas (F₂)?
Answer: 3.0655207907157433
Explanation:
Please explain using Newton’s Laws of Motion (All of them) what happens when a car hits an SUV on the street, given that the first vehicle (car) is moving, while the second vehicle (SUV) is standing still. You may decide which way the SUV moved and how it hits the car, but you have to explain this in this assignment.
According to Newton's second law, force equals mass multiplied by acceleration. As a result, in a car accident, the force exerted by the vehicle and its occupants decreases as the time required for the vehicle to stop increases.
What is Newton's second law?We clearly observed in the Exploration that when two cars collide, each feels a force from the other.
According to Newton's third law, when one object exerts a force on another, the second object feels an equal and opposite force exerted by the first object. This is very clear in the two-object collision.
The force with which your body is struck in a collision is referred to as crash force. Crash force is equal to your body weight multiplied by the vehicle's speed.
Newton's second law states that force equals mass multiplied by acceleration. As a result, the force exerted by the vehicle and its occupants in a car accident decreases as the time required for the vehicle to stop increases.
Thus, this way it hits the car.
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Ni+2Cl2=NiCl4
Then, write balanced half-reactions describing the oxidation and reduction that happen in this reaction.
The oxidation reaction: Ni → Ni⁴⁺ + 4e.
The reduction reaction: 2Cl₂ + 4e → 4Cl⁻.
What is Redox Reaction?
Redox or Oxidation-Reduction processes usually involve simultaneous oxidation and reduction reactions. In a chemical reaction, the material that is being reduced is referred to as the reducing agent, while the substance that is being oxidised is the oxidising agent.
The mentioned reaction: Ni + 2Cl₂ → NiCl₄.
It is an oxidation-reduction reaction comes from two half reactions.
The oxidation reaction: in it Ni losses 4 electrons and is oxidized to Ni⁴⁺ according to the reaction:
Ni → Ni⁴⁺ + 4e.
The reduction reaction: every molecule of Cl₂ will gain 2 electrons and is reduced to 2Cl⁻ according to the reaction:
2Cl₂ + 4e → 4Cl⁻.
The summation of the two-half reactions will give the reaction:
Ni + 2Cl₂ → NiCl₄.
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A 14.01 g sample of N2 reacts with 5.02 g of H2 to form ammonia (NH3). If ammonia is the only product, what mass of ammonia is formed?
The mass of ammonia formed if it were to be the only product would be 17 grams.
Stoichiometric problemNitrogen gas reacts with hydrogen gas to form ammonia gas according to the following balanced equation:
[tex]N_2 + 3H_2 --- > 2NH_3[/tex]
From the balanced equation of the reaction, the mole ratio of nitrogen to hydrogen gas is 1:3.
Recall that, mole = mass/molar mass
Thus, 14.01 g of nitrogen gas would be:
14.01/28.02 = 0.5 mol
5.02 g of hydrogen gas would be:
5.02/1.01 = 5.0 mol
Since the mole ratio from the balanced equation is 1:3, 0.5 mol nitrogen should require 1.5 mol hydrogen. In other words, 5.0 mol hydrogen is excess while 0.5 mol nitrogen is the limiting reactant.
The mole ratio of nitrogen to the ammonia produced is 1:2. Thus, the equivalent mol of ammonia gas produced would be:
0.5 x 2 = 1 mol
Mass of 1 mol ammonia = 1 x 17
= 17 grams
Thus, the mass of ammonia gas that will be formed from 14.01 g sample of nitrogen gas and 5.02 sample of hydrogen gas would be 17 grams.
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A 25-gram block of Aluminum has an initial temperature of 35 degrees Celcius. What will be the final temperature of the aluminum block with the addition of 503.38 Joules of heat?
The final temperature of aluminum is 57.37°C
Q=mcΔT
This means that the amount of energy produced is equal to the mass of the system multiplied by its change of temperature and multiplied by its specific heat
ΔT=(x−27.5) °C
503.38 = 25 × 0.9 × (x - 35)
(x - 35) = 503.3 / 25 × 0.9
x = 57.37°C
What is specific heat constant?
The specific heat capacity c [J/(kg K)] of tissue describes how much energy is required to change the temperature of 1 kg of tissue by 1 K (=1°C). For example, the lower specific heat capacity of fat compared to other soft tissue indicates, that fat requires less energy to obtain a certain temperature increase. If we multiply specific heat capacity by mass density (ρ·c [J/(m3 K)]), we obtain the energy required to raise the temperature of 1 m3 of tissue by 1 K (=1°C)—that is, a quantity equivalent to a volume-specific heat capacity
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Suppose you discovered a mutant yeast whose glycolytic pathway was shorter because of the presence of a new enzyme catalyzing the reaction: NAD NADH + H" Glyceraldehyde 3-phosphate + Hz 3-phosphoglycerate Would shortening glycolysis in this way be beneficial to the cell? Why or why not?
A mutant yeast whose glycolytic pathway was shorter because of the presence of a new enzyme catalyzing the reaction: Glyceraldehyde 3-phosphate + H₂O + NAD⁺→ NADH + H⁺ + 3-phosphoglycerate will shortening glycolysis and wouldn't benefit the cells (anaerobic cells) because ATP isn't being produced and energy gain will be equal to 0.
What are glycolysis and cellular respiration?Using oxygen and the chemical energy from food, a cell can manufacture energy in the form of ATP through a sequence of chemical reactions known as cellular respiration.
The initial stage in the process of cellular respiration is glycolysis, which is also the only step in anaerobic respiration.
Additionally, the anaerobic processes that generate ATP from glyceraldehyde 3-phosphate (G3P) depend on the enzymes phosphoglycerate kinase and pyruvate kinase.
Anaerobic cells won't benefit from these enzyme mutations because they will impair ATP generation.
In conclusion, because ATP isn't being created and energy gain will be equal to zero, reducing the glycolytic pathway won't help the cells (anaerobic cells).
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which of the following substances, if produced from the catabolism of an amino acid, would be glucogenic (in mammals)?
The substances Pyruvate and Oxaloacetat, would be glycogenic in mammals, if produced from the catabolism of an amino acid. Correct answer: numbers 2 and 4.
Pyruvate and oxaloacetate are the end products of the breakdown of certain amino acids (glucogenic amino acids) in the liver. These products can be converted into glucose, through a process known as gluconeogenesis. This process allows the body to maintain blood glucose levels even when dietary sources of glucose are not available.
What is the catabolism of an amino acid?Catabolism of an amino acid refers to the process of breaking down amino acid molecules into simpler molecules, such as:
AmmoniaCarbon dioxideWaterThis process releases energy that the body can use for other metabolic functions.
Which of the following substances, if produced from the catabolism of an amino acid, would be glucogenic (in mammals)?
1. Acetoacetate
2. Pyruvate
3. Acetyl-CoA
4. Oxaloacetate
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What kind of laws with respect to how criminals may or may not vote are on the books in Maine and Vermont?
A. Offenders lose their right to vote permanently.
Parolees can vote but those on probation cannot.
Convicted felons can vote after meeting special requirements.
Convicts can vote while they are still incarcerated
B.
C.
D.
Reset
Next
Step 1:H2(g)+ICl(g)→HI(g)+HCl(g)(slow)Step 2:HI(g)+ICl(g)→HCl(g)+I2(g)(fast)The reaction is carried out at constant temperature inside a rigid container. Based on this mechanism, which of the following is the most likely reason for the different rates of step 1 and step 2 ?
H2(g)+2ICl(g) → 2HCl(g)+I2(g)H2(g)+2ICl(g)→2HCl(g)+I2(g)
rate=k[HI][ICl]
What is Rate of Reaction?
The pace at which the products are created from the reactants in a chemical reaction is referred to as the rate of reaction. It provides some understanding of how quickly a response might occur. For instance, the combustion of cellulose in fire has a very rapid response rate and is finished in a fraction of a second.
The pace at which reactants change into products is known as the rate of reaction or reaction rate. It goes without saying that the pace at which chemical reactions take place varies greatly. While certain chemical reactions occur almost instantly, others often take time to achieve their ultimate equilibrium.
Rate of reaction=Amount of reactant used/Time taken for the consumption of the reactant
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Which of the following substances is formed from the remains of plants and animals?
A. Natural gas B. Petroleum C. Coal D. Water gas E. all except
Answer:
E. all except
Explanation:
All except Water gas
The substances are formed from the remains of plants and animals are fossil fuels. Therefore, option E is correct.
What are fossil fuel ?An extracted and burned fossil fuel is a hydrocarbon-containing substance that naturally originated in the Earth's crust from the remains of extinct plants and animals. Coal, oil, and natural gas are the three primary fossil fuels.
Animal and plant remains are used to create fossil fuels. Coal, petroleum (oil), and natural gas are some of them. They are energy sources made of accumulated fossils of living things that were buried millions of years ago.
Microbes that break down the corpses of plants and animals, such as bacteria and fungi, are referred to as saprotrophs or decomposers. Saprotrophs separate these residues into organic and inorganic substances as they decompose them.
Thus, option E is correct.
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Which does not explain the frontier ethic?
A.
harmony with nature
B.
human control of nature
C.
unlimited resources
D.
no natural laws
Frontier ethics explains that nature has an unlimited supply of resources. So, humans can use natural materials limitlessly. These ethics are sometimes considered as human interference in the matter of natural resources and the environment. Harmony with nature is not possible if human will follow frontier ethics.
Human manages and controls the natural environment. Human consumption of resources in unlimited ways was also discussed in frontier ethics. Natural laws are not followed in frontier ethics. According to frontier ethics, human development and economic growth are the most important issues.
In short, human attitudes and behavior toward nature are not so good. Here, humans are not much concerned about environmental problems. They only value their needs and desires.
Therefore, the correct answer is (A).
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relationship between electron geometry, molecular geometry, orbital hybridization and molecular polarity
The relationship between electron geometry, molecular geometry, orbital hybridization, and molecular polarity is:
Hybridization affects molecular geometry because a molecule's geometry depends on the number of s and p orbitals of a molecule. The orbital hybridization also affects the positions of electron groups and the lone pairs, which affects the electron geometry and the molecular polarity as well.How do electron geometry, molecular geometry, orbital hybridization, and molecular polarity correlate?These 4 aspects have a significant role in the characteristic of a molecule:
Electron geometry, which is the arrangement of electron pairs around the central atom.Molecular geometry, which is the structure that represents the arrangement of atoms in a molecule.Orbital hybridization, which is the redistribution of energy of an atom into the orbitals.Molecular polarity, which is the distribution of the electron clouds across the atoms within a molecule.Orbital hybridization is the key to the other aspects. By determining an atom's s and p hybridization, we can analyze the molecular geometry. For example, an sp³ atom has tetrahedral geometry. Molecular geometry depends on the electron arrangement in atoms and molecules. The electron arrangement defines the electron clouds and affects the molecular polarity as well.
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Question 3:(answer in place of item 15)
The battery below is allowed to operate for 8 hours. At the end of this time the zinc strip is
visibly corroded and much smaller while the copper strip is shiny and thicker. Which way
(left-right or right-left) are electrons flowing.
Is the zinc being reduced or oxidized? How do you know?
In the given Galvanic cell, the electrons are flowing from left to right. The Zinc is oxidized into Zn²⁺ ions.
What is a Galvanic cell?A galvanic cell can be described as an electrochemical cell in which electricity is produced from spontaneous Oxidation-Reduction reactions. Galvanic cells exhibit spontaneous redox reactions but the energy generated from the said reaction.
A common apparatus of the galvanic cell consists of two different metals or electrodes such as Zinc and copper electrodes, each immersed in different beakers containing their respective ion solution. Therefore, the Zinc electrode is placed in ZnSO₄ solution and the copper electrode is placed in CuSO₄ solution.
On the left end, the zinc metal is oxidized into Zn²⁺ ions, and the electrons from the Zinc electrode travel to the copper electrode (right end). The cooper Cu²⁺ ions from the CuSO₄ solution accepts those electrons and deposit as copper metal on the copper electrode.
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As volume increases pressure decreases?
Answer: true
Explanation:
Boyle's Law states both that as volume increases pressure decreases and that as pressure increases volume decreases. Explanation: Boyle's Law states that pressure and volume are inversely proportional, but also assumes that the material is a confined gas (so no amount of gas increases or decreases) and the temperature remains steady.
100 POINTS HELP WILL MARK BRAINLIEST
im not too sure but it should probably be B or D. if not sorry.
100 POINTS HELP WILL GIVE BRAINLIEST
b. testing the hypothesis
All alkali metals react with water to produce hydrogen gas and the corresponding alkali metal hydroxide. A typical reaction is that between lithium and water: 2Li(s) + 2H2O(1) 2LiOH(aq) + H2(g) How many grams of Li are needed to produce 9.89 g of H₂ ?
Answer:
69.23g
Explanation:
Find out how many moles is in 9.89g of H2.
number of moles = mass(g) / molar mass
1 is the molar mass of hydrogen (to the nearest whole)
relative molecular mass of H2: 2*1 = 2
number of moles of H2 = 9.89/2 = 4.945
1 mol of H2 is produced from 2 mol of Li
so
4.945 mol of H2 produces 9.89 mol of Li
mass(g) = number of moles * molar mass
7 is the molar mass of Lithium (to the nearest whole)
mass = 9.89 * 7 = 69.23
69.23 grams of Li are needed to produce 9.89 of H2
the empirical formula and molar mass of several compounds are listed. find the molecular formula of each compound. a. c6h7n, 186.24 g>mol
The molecular formula of C₆H₇N is C₁₂H₁₄N₂; C₂HCl is C₆H₃Cl₃; C₅H₁₀NS₂ is C₁₀H₂₀N₂S₄
The molecular formula can be calculated from the empirical formula and molar mass as follows:
C₆H₇Nfirst we know that the number of moles = subscript
So,
C has 6 moles
H has 7 moles
N has 1 mole
then we can Multiply moles by atomic mass to find molecular weight
therefore,
C = 6 × 12 =72
H =7 × 1 = 7
N = 1 × 14 = 14
to get the empirical weight we calculate by adding molecular weight
C+H+N = 72+7+14= 93
we know that molecular formula is (empirical formula )n
so we should find n by Divide molar mass by the empirical weight
186.24 ÷ 93 = 2
so molecular formula of C₆H₇N is (C₆H₇N)2 = C₁₂H₁₄N₂
C₂HClfirst we know that the number of moles = subscript
So,
C has 2 moles
H has 1 moles
Cl has 1 mole
then we can Multiply moles by molar mass to find molecular weight
therefore,
C = 2 × 12 = 24
H = 1 × 1 = 1
Cl = 1 × 35.5 = 35.5
to get the empirical weight we calculate by adding molecular weight
C+H+Cl = 24+1+35.5 = 60.5
we know that molecular formula is (empirical formula )n
so we should find n by Divide molar mass by the empirical weight
181.44 ÷ 60.5 = 3
so molecular formula of C₂HCl is (C₂HCl)3 = C₆H₃Cl₃
C₅H₁₀NS₂first we know that the number of moles = subscript
So,
C has 5 moles
H has 10 moles
N has 1 mole
S has 2 moles
then we can Multiply moles by atomic mass to find molecular weight
therefore,
C = 5 × 12 = 60
H = 10 × 1 = 10
N = 1 × 14 = 14
S = 2 × 32 =64
to get the empirical weight we calculate by adding molecular weight
C+H+N +S = 60+10+14 +64 = 148
we know that molecular formula is (empirical formula )n
so we should find n by Divide molar mass by the empirical weight
296.54 ÷ 148 = 2
so molecular formula of C₅H₁₀NS₂ is (C₅H₁₀NS₂)2 = C₁₀H₂₀N₂S₄
Your question is incomplete but most probably your full question was
From the given empirical formula and molar mass, find the molecular formula of each compound. C₆H₇N, 186.24 g/mol C₂HCl, 181.44 g/mol C₅H₁₀NS₂,296.54 g/mol
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PLEASE HELP FAST Question- Since metals prefer to give away electrons during chemical bonding, the most active metals are closest to francium, which is a large atom with low ionization energy and electronegativity. Nonmetals prefer to pull in electrons, so the most active nonmetals are closest to fluorine, which has a high ionization energy and electronegativity. The noble gasses (Group 18) are considered inactive since they already have a stable octet of electrons in their outer shell.
Referring to a periodic table, highlight the member of each pair of elements which is most chemically active.
Metal atoms have low ionization energy, and nonmetal atoms have high electronegativity.
According to the periodic table the elements which are most active are Li and Na.
What is Ionic bonding?Ionic bonding occurs when valence electrons transfer completely between atoms. The metal atoms having low ionization energy, loses electrons and becomes positively charged.
The noble gasses (Group 18) are considered inactive since they already have a stable octet of electrons in their outer shell.
An ionic bond is produced between metallic and non-metallic atoms, where electrons are completely transferred from one atom to another. During this process, one atom loses electrons and another one gains them, forming ions.
Therefore, Metal atoms have low ionization energy, and nonmetal atoms have high electronegativity.
According to the periodic table the elements which are most active are Li and Na.
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1. Describe an example of a physical change
or chemical change that is endothermic
and a physical or chemical change that is
exothermic.
GIVING BRAINLIEST
Answer:
Endothermic - Ice cubes absorbing the heat around them to melt into water.
Exothermic - Candle burning giving off heat into the atmosphere.
How many moles of hydrogen atoms are in 7.10 moles of water?
Answer:
3 atoms
Explanation:
there are 2 atoms of hydrogen and 1 atom of oxygen
when looking at the carbon isotopes present in the atmosphere, scientists determined that 13c and 14c levels have decreased over time.
The use of fossil fuels is responsible for increased atmospheric CO2.
What is fossil fuel?
A fossil fuel is a hydrocarbon-containing material that forms naturally in the earth's crust from the remains of dead plants and animals, which is extracted and burned as fuel.The main fossil fuels are coal, oil and natural gas.Fossil fuels can be burned to provide heat for direct use (such as cooking or heating), to power engines (such as internal combustion engines in motor vehicles), or to generate electricity.Some fossil fuels are refined into derivatives such as kerosene, gasoline, and propane before being burned.The origin of fossil fuels is the anaerobic decomposition of buried dead organisms containing organic molecules produced by photosynthesis.Conversion from these materials to high-carbon fossil fuels typically requires a geological process lasting millions of years.To know more about fossil fuel, click the link given below:
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