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3 years ago

How many moles of O2 will be formed from 1.65 moles of KCIO3? (2KClO3–>2KCl + 3O2)

Chemistry

1 answer:

Oduvanchick [21]3 years ago

7 0

Answer:

2.475 mol of O2 formed.

Explanation:

Given 1.65 moles of KClO3 as the target amount in the reactant, used the coefficient of the balanced chemical reaction involved to determine the number of moles of O2 molecules formed.

x mole of O2 = 1.65 mol KClO3 x [(3 mol O2)/ (2 mol KClO3)] = 2.475 mol of O2

x mole of O2 formed = 2.475 mol of O2

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A chemist is making 200 l of a solution that is 62% acid. he is mixing an 80% acid solution with a 30% acid solution. how much o

Savatey [412]

Answer: 72L of 30% and 128L of 80%

You can determine the weight of the acid by multiplying the concentration with the volume. Let say v1 is the volume of 30% solution needed and v2 is the volume of 80% solution.
The weight of acid from the used solution should be equal to the product. You can get this equation
final solution= solution1 + solution2
200l * 62%= v1 * 30% + v2*80%
124L= 0.3v1 + 0.8v2
124L- 0.3v1= 0.8v2
v2=155L- 0.375v1

The total volume of both should be 200l. If you use the previous equation, you can calculate:
v1+v2=200L
v1+ (155L- 0.375v1)= 200L
0.625v1= 200L - 155L
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v1+v2=200L
v2= 200L- 72L= 128L

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2 years ago

2500m into kilometer

Alex777 [14]

<h2>Answer</h2>

1 meter = 1000 km

2500 meter = 2500/1000 km

= 2.5 km

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3 years ago

The first step in the scientific method usually is:

Alja [10]

Answer:

ask a question

Explanation:

You have to ask a question or solve a problem before you can develop a prediction/hypothesis, conduct an experiment or even make a conclusion. The question comes first.

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2 years ago

A gas with a volume of 8 L at a temperature of 473K is switched to a new container with a temperature of 350K. If the pressure r

Digiron [165]

Answer:

The new volume is 5.92 L, which is approximately 6 L

Explanation:

As the gas temperature increases, the molecules move faster and take less time to reach the walls of the container. This means that the number of crashes per unit of time will be greater. That is, there will be an increase (for an instant) in the pressure inside the container and the volume will increase.

So Charles's Law is one of the gas laws that relates the volume and temperature of a certain amount of gas at constant pressure and says that:

If the temperature increases the volume increases

If the temperature decreases the volume decreases

Mathematically this is expressed by:

$\frac{V}{T}=k$

When you want to study two different states, an initial and a final one of a gas, this law is expressed by:

$\frac{V1}{T1} =\frac{V2}{T2}$

In this case:

V1: 8 L
T1: 473 K
V2: ?
T2: 350 K

Replacing:

$\frac{8 L}{473K} =\frac{V2}{350K}$

Solving:

$V2=350K*\frac{8L}{473K}$

V2=5.92 L

<u><em>The new volume is 5.92 L, which is approximately 6 L</em></u>

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3 years ago

Predict Will you find starch in a plant leaf grown in the light? Why?

zimovet [89]

Answer:

You would find starch in a plant leaf.

Explanation:

This is due to the fact that when there is excess energy, it will be stored in plant tissue as starch.

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2 years ago