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Ne4ueva [31]
3 years ago
11

What is percentage composition?

Chemistry
1 answer:
blondinia [14]3 years ago
7 0

Answer:

The percent composition of a component in a compound is the percent of the total mass of the compound that is due to that component. To calculate the percent composition of a component in a compound: Find the molar mass of the compound by adding up the masses of each atom.

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Give an example of a homogeneous mixture and an example of a heterogeneous mixture.
natta225 [31]

Answer:

Homogeneous: 1 phase, heterogeneous 2 or + phases

Explanation:

Homogeneous mixture: water + vinegar

                                        water + ethyl alcohol

Heterogeneous mixture: water + oil.

6 0
4 years ago
Read 2 more answers
The solubility of nitrogen gas at 25°C and a nitrogen pressure of 522 mmHg is 4.7 × 10 –4 mol/L. What is the value of the Henry'
Anestetic [448]

Answer:

6.8 × 10⁻⁴ mol/L.atm

Explanation:

Step 1: Given data

Solubility of nitrogen gas at 25°C (S): 4.7 × 10⁻⁴ mol/L

Partial pressure of nitrogen gas (P): 522 mmHg

Step 2: Convert the partial pressure of nitrogen to atm

We will use the relationship 1 atm = 760 mmHg.

522mmHg \times \frac{1atm}{760mmHg} = 0.687atm

Step 3: Calculate the value of the Henry's Law constant (k)

We will use Henry's law.

S = k \times P\\k = \frac{S}{P} = \frac{4.7 \times 10^{-4}mol/L }{0.687atm} = 6.8 \times 10^{-4} mol/L.atm

3 0
4 years ago
What is the stable ion of cesium
Sauron [17]

Answer:

Cesium has one valence electron that can be removed from itself resulting to its stable monatomic ion of Cs+ .

Explanation:

5 0
3 years ago
The state of matter in which a material has definite shape and definite<br> volume is the
goldenfox [79]

Answer:

It's a solid.

Explanation:

Solids never change their shape as opposed to gases and liquids. This is because their molecules are tightly packed together. Since all solids have a definite shape, it's volume will also be definite.

7 0
3 years ago
Mixture with two or more substances that are evenly mixed
sertanlavr [38]
A homogeneous mixture, the substances are uniformly distributed throughout the mixture
8 0
3 years ago
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