Answer:
Explanation:
Find the answer below
The decomposition of carbon disulfide to carbon monosulfide and sulfur is first order with k=2.8 ×10^-7 at 1000°C .What is the half-life of this reaction at 1000°C?
Answer:
2.5×10⁶ s
Explanation:
From the question given above, the following data were obtained:
Rate constant (K) = 2.8×10¯⁷ s¯¹
Half-life (t½) =?
The half-life of a first order reaction is given by:
Half-life (t½) = 0.693 / Rate constant (K)
t½ = 0.693 / K
With the above formula, we can obtain the half-life of the reaction as follow:
Rate constant (K) = 2.8×10¯⁷ s¯¹
Half-life (t½) =?
t½ = 0.693 / K
t½ = 0.693 / 2.8×10¯⁷
t½ = 2.5×10⁶ s
Therefore, the half-life of the reaction is 2.5×10⁶ s
Which statement best describes why industry uses heterogeneous catalysts?
They tend to be more stable.
They are all gases at room temperature.
They form strong bonds with reactant molecules.
They cause stronger bonds to form between molecules.
Answer:
They tend to be more stable
Explanation:
A heterogeneous catalyst is a type of catalyst that exist in a phase which is different from the phases of the reacting mixture or specie or the products and the reactants are absorbed into sites on the catalyst for binding
The heterogeneous catalyst is used in industry because of its main advantage, which is its ease and simplicity of separation from the mixture of the reaction using a straightforward process such as filtration to recover and reuse a costly (heterogeneous) catalyst
Therefore, industry uses the heterogeneous catalyst because the catalyst tend to be more stable and can be easily recovered and reused in its original form
Answer:
A. They tend to be more stable.
Explanation:
Got a 100 on E2020.
Need help asap - There is an error in the rate-determining step of the following proposed mechanism.
Slow step: CH3(g) + Cl2(g) → CH3(g) + HCl(g) and the rate rule is k1 = [CH4][Cl2]
Fast step: CH3(g) + Cl2(g) → CH3Cl(g) + Cl–(g) and the rate rule is k2 = [CH4][Cl2]
Overall : CH4(g) + 2Cl2(g) → CH3Cl(g) + HCl(g) + Cl–(g)
Which shows the correct rate-determining step for the mechanism?
CH4(g) + 2Cl(g) → CH3Cl(g) + HCl(g) + Cl–(g)
CH4(g) + Cl2(g) → CH3(g) + HCl(g) and the rate rule is k1 = [CH4][Cl2]
CH4(g) + Cl2(g) → CH3Cl(g) + Cl–(g) and the rate rule is k2 = [CH4][Cl2]
CH3(g) + 2Cl2(g) → CH3Cl(g) + Cl–(g) and the rate rule is k2 = [CH4][Cl2]
Answer:
CH4(g) + Cl2(g) → CH3(g) + HCl(g) and the rate rule is k1 = [CH4][Cl2]
Explanation:
Firstly, we must remember that the substitution reaction between halogens and alkanes to yield halogenoalkanes does not proceed by ionic mechanism rather it proceeds by free radical mechanism.
Now, if we look at the rate determining step as shown in the question, the elementary reaction equation of that step is not balanced.
Hence, the correct elementary reaction equation for the rate determining step and the rate law is; CH4(g) + Cl2(g) → CH3(g) + HCl(g) and the rate rule is k1 = [CH4][Cl2]
Which of the following would be expected to have the highest viscosity? CH3CH2OH, HOCH2OH, CH3CH2CH3
О НОСН2ОН
O They are all the same.
О СН3СН2ОН
O CH3CH2CH3
Answer: Out of the given options [tex]HOCH_{2}OH[/tex] is expected to have the highest viscosity.
Explanation:
The resistance occurred in the flow of a liquid substance is called viscosity.
More stronger is the intermolecular forces present in a substance more will be its resistance in its flow. Hence, more will be its viscosity.
For example, [tex]HOCH_{2}OH[/tex] has strong intermolecular hydrogen bonding than the one's present in [tex]CH_{3}CH_{2}OH[/tex] and [tex]CH_{3}CH_{2}CH_{3}[/tex]. This is because two-OH groups are present over here.
Thus, we can conclude that out of the given options [tex]HOCH_{2}OH[/tex] is expected to have the highest viscosity.
Monodisperse polyacrylonitrile contains molecules with the general formula -(CH2CHCN)n-, where n is typically greater than 10,000. Given that a sample of monodisperse polyacrilonitrile weighs 676.8 g and contains molecules of -(CH2CHCN)n-, calculate n.
Answer:
7.68 × 10²⁴
Explanation:
Step 1: Calculate the mass of 1 molecule of the monomer CH₂CHCN
We will get the mass of the monomer by adding the masses of the elements.
mCH₂CHCN = 3 × mC + 3 × mH + 1 × mN
mCH₂CHCN = 3 × 12.01 amu + 3 × 1.01 amu + 1 × 14.01 amu = 53.07 amu
Step 2: Convert the mass of the monomer to grams
We will use the conversion factor 1 amu = 1.66 × 10⁻²⁴ g
53.07 amu × 1.66 × 10⁻²⁴ g/1 amu = 8.81 × 10⁻²³ g
Step 3: Calculate "n"
We will divide the mass of the polymer by the mass of the monomer.
n = 676.8 g / 8.81 × 10⁻²³ g = 7.68 × 10²⁴
Write the net ionic equation for this precipitation reaction. Include physical states. 2LiCl(aq)+Pb(CH3COO)2(aq)⟶PbCl2(s)+2LiCH3COO(aq)
Answer:
[tex]{ \bf{ 2 Cl{}^{ - } _{(aq)} + Pb {}^{2 + } _{(aq)} \: ⟶ \: PbCl _{2(s)}}}[/tex]
A solution of the ionic salt CaSO3 would have blank pH
Answer: basic
Explanation:
I just answered it on acellus it's correct ;)
A solution of the ionic salt CaSO₃ would have basic pH as on reaction with base it gives an acid.
What is an acid?
Acids are defined as substances which on dissociation yield H+ ions , and these substances are sour in taste. Compounds HCl, H₂SO₄ and HNO₃ are acids as they yield H+ ions on dissociation.
According to the number of H+ ions which are generated on dissociation acids are classified as mono-protic , di-protic ,tri-protic and polyprotic acids depending on the number of protons which are liberated on dissociation.
Acids are widely used in industries for production of fertilizers, detergents batteries and dyes.They are used in chemical industries for production of chemical compounds like salts which are produced by neutralization reactions.
Learn more about acids,here:
https://brainly.com/question/29796621
#SPJ3
Some foods undergo sterilization in order to kill bacteria living in and on the
food. What type of radiation is used in sterilization to kill bacteria?
A. Gamma
B. Alpha
C. Beta
D. Fission
Answer:
A: Gamma
Gamma rays have enough energy to kill bacteria
What point A on the phase diagram called?
liquid
(374°C/218 atm)
A
solid
pressure (atm)
gas
temperature (°C)
OA.
the melting point
OB.
the boiling point
Ос.
the freezing point
OD
the critical point
OE.
the triple point
Answer:
D) the critical point
Explanation:
Point A is the critical point in phase diagram. This is the highest temperature and pressure at which a pure material can exist in vapor/liquid equilibrium. Pretty cool!
Match each word to its correct meaning. 1. carbon sequestration carbon dioxide, water vapor, methane, nitrogen oxides, and some CFCs that absorb heat and keep it in the earth's atmosphere 2. greenhouse effect technology used to capture the carbon released from smokestacks and store it in some part of the environment to keep it out of the atmosphere 3. greenhouse gas a term used to describe the role that greenhouse gases play in keeping the earth warm
Answer:
1. Greenhouse gas.
2. Carbon sequestration.
3. Greenhouse effect.
Explanation:
Greenhouse gases can be defined as gases that trap heat within the Earth's atmosphere. Thus, an increase in global temperature is largely caused due to an increase in the amount of greenhouse gases in Earth's atmosphere.
Some examples of greenhouse gases present in the atmosphere are methane, water vapor, carbon dioxide etc.
Matching the descriptions with their term respectively, we have;
1. Greenhouse gas: carbon dioxide, water vapor, methane, nitrogen oxides, and some CFCs that absorb heat and keep it in the earth's atmosphere
2. Carbon sequestration: it's a technology used to capture the carbon released from smokestacks and store it in some part of the environment to keep it out of the atmosphere. Thus, it's a process that is typically used for capturing and the long-term storage of atmospheric carbon dioxide in soil, ocean, plants and geologic formation, so as to reduce global warming or climate change.
3. Greenhouse effect: it's a term used to describe the negative role that greenhouse gases such as methane, water vapor, carbon dioxide etc., play in keeping the earth warm.
URGENT HELP
26. A solution of hydrogen peroxide is 23.3% H2O2 by mass and has a density of 1.11
g/cm”. The molarity of the solution is:
a) 7.14 M
b) 0.259 M
c) 7.60 M
d) 7.93 M
e) none of these
Differentiate between nuclear fusion and fission .
Answer:
Explanation:
the difference is below:
Sometimes we can see pollutants in water – such as floating trash. What pollutants might you not “see” in water but are dangerous to living things? *
short answer please
Answer:
chemical waste, or dangerous chemicals (liquids) in general, unless they are oily
balance equation P2O5 + H20 - - - - > H3PO4
Help me.....
Answer:
Search by reactants (P 2O 5, H 2O) and by products (H 3PO 4)
H2O + P2O5 → H3PO4
H2O + HNO3 + P2O5 → H3PO4 + N2O5
The results of this lab experiment
the hypothesis.are answers correct
Anwer
D) clearly supported
Explanation:
Answer:
d
Explanation:
ionic bonds show which characteristics that arent seen in covalent bonds
4. How much heat required to convert (heat up) 16 gm of ice to 125°C of steam
Cice = 2.03 J/gm.°C,
L = 2.264 J/gm
Cwater = 4.184 J/gm.°C
4 = 0.334 J/gm
Csteam = 1.996 J/gm.°C
Answer: it requires the amount of heat that it takes to make it steam
Explanation:
The process of changing a gas to a liquid is known as _____.
sublimation
precipitation
evaporation
condensation
Answer:
Condensation is the process.
Which describes the molecule below?
O
A. A lipid with three unsaturated fatty acids
O
B. A lipid with three saturated fatty acids
O C. A lipid with two unsaturated fatty acids and one saturated fatty
acid
O D. A lipid with two saturated fatty acids and one unsaturated fatty
acid
The molecule is described as the, A. lipid with three unsaturated fatty acids.
A collection of two or more atoms bonded together by attractive forces known as chemical bonds is referred to as a molecule. In the given question, the molecule shown in diagram is a lipid, or triglyceride, with three fatty acids and a glycerol backbone. Unsaturated fatty acids are those with double or triple bonds in their molecular makeup.
Depending on how many double or triple bonds are typically there in its structure, a fatty acid can either be polysaturated or monounsaturated. Generally, there are three unsaturated fatty acids in this lipid, all of which contain one double bond in their structures.
Read more about molecule on:
https://brainly.com/question/30337264
#SPJ1
What is the volume of the fluid in the graduated cylinder measured to the correct degree of precision?
Use this media to help you complete the question.
43.4 mL
44.0 mL
43.42 mL
44.10 mL
Answer:
44.10
Explanation:
got it right on odessyware
Give reason for the following:
(a) Silver nitrate solution is kept in coloured bottles.
(b) Molybdenum is used in the manufacture of ammonia.
(c) Blue solution of copper sulphate changes to green when a piece of iron is added to this solution.
Answer:
a) In the presence of light silver nitrate decompose to form silver. hence to prevent the decomposition it is kept in dark coloured bottles.
b) Molybdenum is used in the manufacture of ammonium because molybdenum acts as a promoter which increases the efficiency of the catalyst Iron, resulting in better yield of ammonia.
c) When an iron nail immersed in the solution of copper sulphate than iron displaces copper from the solution of copper sulphate because iron is more reactive than copper. Therefore copper sulphate solution colour changes from blue to pale green.
What kind of bonds are hydrogen bonds???
A. An intramolecular covalent bond in the H2 molecule
B. Polar covalent bonds that form between hydrogen and another atom
C. Any bond between hydrogen and a highly electronegative atom
D. Strong polar attractions between molecules involving H,F,O, and N
Hydrogen bonding is a special type of dipole-dipole attraction between molecules, not a covalent bond to a hydrogen atom. It results from the attractive force between a hydrogen atom covalently bonded to a very electronegative atom such as a N, O, or F atom and another very electronegative atom.
A student is performing an experiment that requires measuring the boiling point of water. The accepted
value for the boiling point of pure water is 100.0°C. In the experiment, the student measured the boiling
point to be 99.2°C. What is the percent error in the student's experiment?
Answer:
.8°c my fingers jfjfjkfkrhrb
Terry usually rides his bike 15mph. If his riding speed is reduced by 3mph how far can he ride in 1.7 hours
Answer:
20.4 Miles
Explanation:
If Terry's riding speed is reduced by 3mph, he would be riding at 12mph.
12*1.7 = 20.4 miles
(miles per hour literally means how many miles you can travel in an hour at your current speed)
A gardener decides to use only part of their garden in the spring. What will most likely happen first in the unused part of the garden?
Answer:
Growth of weeds and grasses
Explanation:
The part of the garden, probably left to rest by the Gardner, would start experiencing a legion of invasive plants. Giant weeds and grasses could be seen, and brambles and tree seedlings could also sneak in.
Some Gardeners would recommend the use of herbicides to restore order to an abandoned garden even though certain scientists are of the opinion that chemicals may not offer a sound solution to the problem.
How is alkyne converted to acetone?
Answer:
Propyne can be converted to the acetone when it is made to undergo the reaction with mercuric sulphate followed by hydrolysis and thus, resultant product, thus formed is acetone.
Explanation:
Joelle is a manager at a construction company, and she is interested in the chemistry behind the materials they use. She has begun studying the materials used to fill walls. She knows that to keep the temperature inside a room steady the material must be a thermal insulator, and she predicts that materials should not be acidic or else they would dissolve too easily in water. Which of these is a molecular ingredient that could be used in a wall-filling material ?
Answer: C6H6
Explanation:
The molecular formula C₆H₆ represents Benzene. Benzene is colorless, flammable, and has a sweet and gasoline-like odor. It's a toxic chemical, and can cause cancer.
Benzene is a hydrocarbon and used for the manufacturing of products such as plastic, detergents, glues, dyes, and rubber. It can also be used in making wall-filling material.
Answer: C6H6
Explanation:
The molecular formula C₆H₆ represents Benzene. Benzene is colorless, flammable, and has a sweet and gasoline-like odor. It's a toxic chemical, and can cause cancer.
Benzene is a hydrocarbon and used for the manufacturing of products such as plastic, detergents, glues, dyes, and rubber. It can also be used in making wall-filling material.
a glucose molocule is the
Answer: Glucose (C6H12O6) is a hexose -- a monosaccharide containing six carbon atoms. Glucose is an aldehyde (contains a -CHO group). Five of the carbons plus an oxygen atom form a loop called a "pyranose ring", the most stable form for six-carbon aldoses.
Explanation:.
Temperature depends on the average kinetic energy of the particles in a sample. How does this help explain why a plasma-based light does not have a high temperature?
Answer:
Temperature depends on the average kinetic energy of the particles in a sample. ... The fastest particles have the greatest mass. Most particles in the plasma are heavy and slow. The fastest particles transfer most of their energy through collisions
Answer:
C. Most particles in the plasma are heavy, slow, and very low density.
Explanation:
Correct on Edge 2022!!!
Good luck everyone, you got this! Have a great day!
Which statements are true of the reaction below? 2Na(s) + Cl2(g) ---> 2NaCl(s)

A.
Na(s) is a reactant.

B.
NaCl is a product.

C.
NaCl is a liquid.

D.
Cl2 is a solid.
Answer:
A and B are both true
Explanation:
Na is REACTING with Cl2 to PRODUCE NaCl