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Luda [366]
3 years ago
11

Can someone please help me with these questions

Chemistry
1 answer:
skelet666 [1.2K]3 years ago
3 0

Answer:

1. 40 grams

2. 20 grams

Explanation:

every 10 years, divide by 2

year 0; 80

year 10; 40

year 0; 80

year 10; 40

year 20; 20

please give thanks by clicking heart button! :)

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In liquids, the attractive intermolecular forces are ________. In liquids, the attractive intermolecular forces are ________. st
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Answer:

strong enough to hold molecules relatively close together but not strong enough to keep molecules from moving past each other.

Explanation:

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2 years ago
What volume of a 2.25 M sodium chloride solution will contain 4.58 moles of sodium chloride
Rzqust [24]

Answer:

Option E. 2.04 L

Explanation:

Data obtained from the question include:

Molarity of NaCl = 2.25 M

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Volume =..?

Molarity is simply defined as the mole of solute per unit litre of the solution. It is represented mathematically as:

Molarity = mole /Volume

With the above formula, we can obtain the volume of the solution as follow:

Molarity = mole /Volume

2.25 = 4.58/volume

Cross multiply

2.25 x volume = 4.58

Divide both side by 2.25

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Therefore, the volume of the solution is 2.04 L

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What does the oxidation state of kr indicate
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An unknown gas diffuses 1.25 times faster than CO2 gas. What is the molar mass of the unknown gas?​
hodyreva [135]

Answer:

28.16 g/mol

Explanation:

From Graham's law;

Let the rate of diffusion of gas X be 1.25

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1.25/1=√44/M

(1.25/1)^2 = 44/M

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M= 44/1.5625

M= 28.16 g/mol

4 0
3 years ago
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