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3 years ago

Why does temperature increase between changes of physical state?

1 answer:

7 0

As temperatures increase, additional heat energy is applied to the constituent parts of a solid, which causes additional molecular motion. Molecules begin to push against one another and overall volume of a substance increases. When thermal energy is added to a substance, it’s temperature increases.

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What is H2 + F2 = HF

Mashutka [201]

Answer:H2 + F2 → 2HF

Hydrogen react with fluorine to produce hydrogen fluoride.

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4 years ago

Read 2 more answers

Which of these periods contain elements with electrons in s, p, d, and f orbitals?

zmey [24]

I think the answer is D. Periods 6-7, Because t<span>he periods that would contain elements with electrons in s, p, d, and f orbitals are periods 6-7.

(I hope this helps you a lot! :) Have a nice day!)</span>

7 0

3 years ago

HELP ASAP!! 15 PTS!! Match each of the unknown ions to its appropriate description.

jok3333 [9.3K]

Answer:

1 and a

2 and b

3 and c

4 and d

Explanation:

+ = gained

- = lost

when there is a two it has two electrons

I also had a high school friend check my accuracy

HOPE THIS HELPS!!!! :)

<3333333333

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4 years ago

What happens if you put sugar in someone's gas tank?

julsineya [31]

The sugar reacts with the gas, turning it to a semi-solid and sticky substance; clogging the gas lines along with many other things.

4 0

3 years ago

Azurite, 2 CuCO3 * Cu(OH)2 is blue and malachite, CuCO3 * Cu(OH)2 is green. Which contains the higher percentage of copper? Each

blagie [28]

Answer:

Malachite green has highest percentage of copper.

Explanation:

Azurite: $2CuCO_3.Cu(OH)_2$

Molar mass of Azurite = M = 344.67 g/mol

Atomic mass of copper = 63.55 g/mol

Percentage of copper in Azurite :

$Cu\%=\frac{3\times 63.55 g/mol}{344.67 g/mol}\times 100=55.31\%$

The percentage of copper in an azurite is 55.31%.

Malachite: $CuCO_3.Cu(OH)_2$

Molar mass of Malachite = M = 221.12 g/mol

Atomic mass of copper = 63.55 g/mol

Percentage of copper in Malachite:

$Cu\%=\frac{2\times 63.55 g/mol}{221.12 g/mol}\times 100=57.48\%$

The percentage of copper in an malachite is 57.48%.

4 0

3 years ago