3 years ago

Which of the following represents a chemical change?

Chemistry

1 answer:

Snezhnost [94]3 years ago

3 0

The answer is B.) Freezing of water

You might be interested in

The temperature in a town started out at 55 degrees. By the end of the day the temperature dropped to -6 degrees.

garik1379 [7]

Answer:

The choice of the answer is fourth option that is -61 degrees.

Therefore the temperature drop is -61°Centigrade.

Explanation:

Given:

The temperature in a town started out at 55 degrees

Start temperature = 55°Centigrade. (Initial temperature)

End of the Day = -6°Centigrade. (Final temperature)

To Find:

How far did the temperature drop?

Solution:

We will have,

$\textrm{Temperature drop}=\textrm{Final temperature}-\textrm{Initial temperature}$

Substituting the above values in it we get

$\textrm{Temperature drop}=-6-55\\\\\therefore \textrm{Temperature drop}=-61\° centigrade$

Therefore the temperature drop is -61°Centigrade.

4 0

3 years ago

How many square km is 2.5 x 107 m2 (don't write your answer in scientific notation)

jek_recluse [69]

Answer:

0.0002675 square km that's all (if you want it in feet just comment below this)

Explanation:

3 0

3 years ago

Which of the two substances would have the higher boiling point ch4 or c?

kifflom [539]

Carbon has a higher boiling point.

6 0

3 years ago

Which statement is correct with respect to gross primary productivity

bezimeni [28]

Gross primary production and net primary production. Gross primary production is the amount of chemical energy as biomass that primary producers create in a given length of time.

8 0

3 years ago

What is the percent composition of calcium fluoride

vladimir1956 [14]

Answer:

78.07

Explanation:

them seperatly is

Calcium Ca 51.333%

Fluorine F 48.667%

8 0

2 years ago