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frez [133]
3 years ago
14

Which mathematical relationship should you use to convert moles of a substance into grams?

Chemistry
1 answer:
pav-90 [236]3 years ago
5 0

Answer:

A

Explanation:

The equation for this conversion is Mass = \frac{Moles}{Mr}

Mr is molar mass.

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2 KClO_2 produces 2 KCl+ 3O_2 when heated. If this reaction produces 82.8 g of KCl how many grams of O2 were produced?
Ad libitum [116K]

Answer:

37.046 grams of oxygen gas were produced.

Explanation:

2KClO_2\rightarrow 2KCl+ 3O_2

Moles of potassium chlorite = \frac{82.2 g}{106.5 g/mol}=0.7718 mol

According to reaction 2 moles of potassium chlorite gives 3 moles of oxygen gas.

Then 0.7718 moles of potassium chlorite will give:

\frac{3}{2}\times 0.7718 mol=1.1577 mol of oxygen gas.

Mass of 1.1577 moles of oxygen gas:

1.1577 mol × 32 g/mol = 37.046 g

37.046 grams of oxygen gas were produced.

4 0
3 years ago
Air in a closed cylinder is heated from 25 degree to 36 degree. If the initial pressure is 3.80 atm what is the final pressure ?
aleksklad [387]
Aww man, I love these types of problems!!!
So, it's a simple formula:
P1*V1/T1=P2*V2/T2

In this case, we remove V(volume) as there is none listed, leaving this:
P1/T1=P2=T2

Think you got it from here? All you gotta do is plug in the numbers and solve
If you have any further problems, just let me know!!
3 0
3 years ago
Read 2 more answers
A liquid has a density of 1g/mL. If you have 50mL of the liquid, what would its mass be?
Svetlanka [38]

Answer:

<h2>The answer is 50 g</h2>

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

<h3>mass = Density × volume</h3>

From the question

volume of liquid = 50 mL

density = 1g/mL

The mass of the liquid is

mass = 50 × 1

We have the final answer as

50 g

Hope this helps you

8 0
3 years ago
What do u call a change in a state from a liquid to a gas
MrRissso [65]
To make liquid a gas u have to boil it and when u boil it it's call evaporation. so your answer is evaporation
5 0
3 years ago
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KOH +HBr KBr+ H2O<br><br> Which is the acid in this reaction?
Allisa [31]

Answer:

HBr Potassium bromide

5 0
3 years ago
Read 2 more answers
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