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mixas84 [53]
3 years ago
10

Calculate the speed of a marble that rolls 9 cm in 4 seconds

Chemistry
1 answer:
cupoosta [38]3 years ago
6 0

Answer:

2.25

Explanation:

9/4

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What is the difference between the product and the reactant
timama [110]

Answer:

Explanation:

A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products . A product is a substance that is present at the end of a chemical reaction.

h2 + 02 = h2o

<h2 />
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3 years ago
Which of the reactions below are catalyzed? Check all that apply.
Verdich [7]

Answer:

B. Salt, NaCl, is produced by the process of evaporation of seawater or brine. If the surface area of the water is increased, the same volume of water evaporates faster.

C. The Haber process combines hydrogen and nitrogen to make ammonia. The two gases are passed through a reactor under pressure and at high temperatures. If iron is added to the reactor, the yield of ammonia increases.

Explanation:

Evaporation of water is responsible for the production of sodium chloride also known as table salt. Sodium and chlorine are present in water. When more evaporation of water occurs, sodium and chlorine come close together forming sodium chloride. Haber process is responsible for the production of ammonia which is used as fertilizer. For speed up the process, catalyst is used such as iron in order to complete the reaction in less time. Iron binds hydrogen and nitrogen with each other.

7 0
3 years ago
Read 2 more answers
What is percent composition of carbon in c2h6o3
zubka84 [21]

the percentage composition of carbon is 30.77%

5 0
3 years ago
SO2________________.
Mashcka [7]

Answer:

a. Dipole-dipole bonding

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SO2 has dipole-dipole bonding. This is because of the difference in the electronegativities  of Sulphur and oxygen. Moreover, the lone pair of electrons on S gives it bent shape with a net dipole  unlike CO2 which has a linear shape.( This why CO2 does not have any dipole moment).

So, the correct answer is a.

6 0
3 years ago
A chemical change occurs when select one:
Ne4ueva [31]
I think it is d. Because the process is not reversible and it a chemical process
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