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3 years ago

Which catalyzed reaction breaks up ozone?

Chemistry

1 answer:

bekas [8.4K]3 years ago

4 0

This is a good example of homogeneous catalysis where everything is present as a gas.

Ozone, O3, is constantly being formed and broken up again in the high atmosphere by the action of ultraviolet light. Ordinary oxygen molecules absorb ultraviolet light and break into individual oxygen atoms. These have unpaired electrons, and are known as free radicals. They are very reactive.

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Adding heat to water results in a relatively small temperature change because

V125BC [204]

Answer: Because water has a high specific heat capacity due to the hydrogen bonding within the H₂O molecules ; so it takes a great deal of energy, or heat, to break these bonds— or to form them.
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7 0

3 years ago

An artifact contains one-fourth as much carbon-14 as the atmosphere. how old is the artifact

Nikolay [14]

<h3>Answer;</h3>

= 11,460 years

<h3>Explanation;</h3>

The half life of Carbon-14 is 5,730 years . Half life is the time taken by a radioactive material to decay by half of its original mass. Therefore, it would take a time of 5730 years for a sample of 100 g of carbon-14 to decay to 50 grams

The initial amount of carbon-14 in this case was 1 whole; thus; 

1 → 1/2 →1/4

To contain 1/4 of the value, 2 half-lives have passed. 

But, 1 half life = 5,730 years

Therefore; The artifact is is therefore: 2 x 5,730 

 = 11,460 years 

4 0

2 years ago

Read 2 more answers

What must be true of the net charge for any sample of sodium chloride

Ede4ka [16]

Answer:

Zero (0)

Explanation:

Since Na^+ has a charge of +1 and Cl^- has a charge of —1 in NaCl

Then the net = +1 —1 = 0

4 0

3 years ago

Read 2 more answers

Bond length is the distance between the centers of two bonded atoms. On the potential energy curve, the bond length is the inter

mariarad [96]

Answer:

152 pm

Explanation:

According to the question, we can estimate the bond length from the given values of the atomic radii. This now is the upper limit of the bond length for the molecule.

Since we have that;

Atomic radius of H= 37.0 pm

Atomic radius of Br = 115.0 pm

Bond length = Atomic radius of H + Atomic radius of Br

Bond length = 37.0 pm + 115.0 pm

Bond length = 152 pm

5 0

2 years ago

121) The sugar sucrose has 12 carbon atoms, 22 hydrogen atoms and 11 oxygen

mart [117]

Answer:

Explanation:

121) The sugar sucrose has 12 carbon atoms, 22 hydrogen atoms and 11 oxygen

atoms. How would this be written?

A) Co12H22O1 [Co is cobalt]

B) CI2H22011 [Yes]

C) C6H1206 [6 C atoms]

D) CacH1206 [Ca is calcium]

122) How are the elements organized on the periodic table?

A) Atomic Mass [Yes, from lightest to heaviest]

B) Element Name

C) Symbol

D) No Set Organization

123) Which of the following elements would be considered a compound?

A) CH [Yes, two or more elements combined]

B) Si [No]

C)F [No]

D) O6 [No, multiple atoms, but same element]

124) The formula for water is H2O meaning there are 2 Hydrogen atoms and 1

Oxygen. What is the atomic mass of one molecule to the nearest hundredth?

A) 15.99

B) 16.99

C) 17.99 [Yes, 16 + 2*1 = 18]

D) 18.99

4 0

1 year ago