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BlackZzzverrR [31]
3 years ago
13

How do you find the percent composition of CuBr2

Chemistry
1 answer:
Levart [38]3 years ago
7 0

Answer:

Explanation: the molar mass of the whole compound is 223.35u

now make ratios for each of the elements and multiply by 100%

copper= 63.55/223.35 x 100    % comp of copper is 28.45%

bromine= (79.9x2)/223.35 x 100   %comp of bromine is 71.54%

multiply bromines molar mass by 2 when calculating

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Because subatomic particles ARE what make up atoms.
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A sample of oxygen gas occupies a volume of 250 mL at .8 atm of pressure. What volume will it occupy at 1.2 atm of pressure?
musickatia [10]
167 mL

P1V1 = P2V2
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Magnesium reacts with carbon dioxide to form magnesium oxide and pure solid carbon.
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it’s quite simple.
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How to solve 5gNaCl= MolE NaCl
valentinak56 [21]

0.086mole

Explanation:

The problem is very simple. It involves conversion from mass to number of moles of NaCl

What is mole?

 A mole is a unit of measuring chemical substances. It is the amount that contains the avogadro's number of particles.

How is it related and can be converted from mass;

 

Number of moles of a substance = \frac{mass}{molar mass}

Since we know the mass, we can find the molar mass and put into this equation;

Molar mass of NaCl = 23 + 35.5 = 58.5g/mol

Number of moles of NaCl = \frac{5}{58.5}  = 0.086mole

learn more:

Number of moles brainly.com/question/1841136

#learnwithBrainly

4 0
3 years ago
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