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-Dominant- [34]
3 years ago
6

The mass of 1.63x10^21 silicon atoms is how many grams

Chemistry
1 answer:
gladu [14]3 years ago
6 0
<span>Lyle stirs 5.0 grams of salt into a beaker of water. He then adds 15.0 grams of pure iodine to the mixture. If the total mass of the new mixture is 225 grams, what is the mass of the water
</span>

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4. A 0.51 kg solution contains 87 mg of potassium iodide. Calculate the W/W concentration
anzhelika [568]

Taking into account the definition of percentage composition, the percent composition of potassium iodide in this sample is 0.017%.

<h3>Definition of percent composition </h3>

The Percentage Composition is a measure of the amount of mass that an element occupies in a compound and indicates the percentage by mass of each element that is part of a compound.

To calculate the percentage of composition, it is necessary to know the mass of the element in a known mass of the compound.

<h3>Percentage Composition in this case</h3>

In this case, you know that a 0.51 kg (or 510000 mg, being 1 kg= 1000000 mg) solution contains 87 mg of potassium iodide.

Dividing the mass amount of potassium iodide present in the compound by the mass of the sample and multiplying it by 100 to obtain a percentage value, the percentage composition of potassium iodide is obtained:

percentage composition of potassium iodide=\frac{87 mg}{510000 mg} x100

<u><em>percentage composition of potassium iodide= 0.017%</em></u>

Finally, the percent composition of potassium iodide in this sample is 0.017%.

Learn more about percent composition:

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#SPJ1

3 0
2 years ago
A device that transforms chemical energy to electrical energy, and provides electrical force in a current.
DerKrebs [107]

The answer is a battery

5 0
3 years ago
a solid substance is an excellent conductor of electricity. The chemical bonds in this substance are most likely...
Alex
The answer is "metallic" hope this helps

6 0
3 years ago
Read 2 more answers
How many grams of water (H2O) are there in 2.60 mol of the compound?
ad-work [718]

Answer:

46.839728  grams of water

Explanation:

1 mole is equal to 1 moles H2O, or 18.01528 grams

18.01528 times 2.6 = 46.839728

There are 46.839728  grams h20 in 2.60 mol of the compound

4 0
3 years ago
HURRY GIVING BRAINLIEST......
Dmitry [639]

Answer:

I think Water because it keeps you dehydrated. You will still survive with out any food or any place to live but it's not air i know that for a fact because we need oxygen to live.

Explanation:

hope that helps:) you might can add some more words to it or change it up if you want to.

4 0
3 years ago
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