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Sauron [17]
3 years ago
10

What phase change occurs when a solid changes into a gas?

Chemistry
1 answer:
Sloan [31]3 years ago
7 0

Answer:

Sublimation

Explanation:

Sublimation is the term used to describe when a solid "skips" the liquid phase and turns directly into a gas from solid form. Dry ice demonstrates sublimation when exposed to room temperature air.

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What is the total pressure in atmosphere (atm) of a gas mixture containing argon gas at 0.28 atm, helium gas at 760 mm Hg, and n
siniylev [52]

Answer:

I dont know, sorry!

4 0
3 years ago
The valance number of M is 3 . what is the formula of its phosphorus​
lakkis [162]
The formula for phosphorus is P4
3 0
3 years ago
Hydrogen gas can be prepared by reaction of zinc metal with aqueous HCl:
kow [346]

Answer:

The volume of hydrogen gas generated by given reaction is 9.48 L

Explanation:

Firstly, we calculate the mole of Zinc added, n = 25.5 / 65 = 0.392 mol

With the same equivalent, the mole of generated hydrogen gas will be the same, at 0.392 mol.

Secondly, we get the equation

<em>P . V = n . R . T</em>

with P (pressure, atm), V (volume, litre), n (mole, mol), R (ideal gas constant, 0.082), T (temperature, Kelvin)

So we have to convert the given information to correct unit

P = 742 mmHg = 0.976 atm

T = 15 °C = 288 K

Hence we can calculate the generated volume by

V = n . R . T / P = 0.392 x 0.082 x 288 / 0.976 = 9.48 L

3 0
4 years ago
Balance : Fe2O3 + Zn = Fe+ZnO
zysi [14]

Answer:

Fe₂O₃ + 3Zn → 2Fe + 3ZnO

Explanation:

Step 1: RxN

Fe₂O₃ + Zn → Fe + ZnO

Step 2: Balance RxN

We need 2 Fe's on both sides.

We also need 3 O's on both sides.

  • If we multiply ZnO by 3, we will need 3 Zn's as well

Fe₂O₃ + 3Zn → 2Fe + 3ZnO

4 0
4 years ago
What is the balanced equation for the combustion of magnesium?
Lostsunrise [7]

Answer:

2Mg  +  O2 →  2MgO

Explanation:

In all conbustion you should know, that reactans are an specific compound and O2, so the products must be CO2 and H2O, or in this case, the corresponding oxide.

6 0
4 years ago
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