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BlackZzzverrR [31]
2 years ago
13

How do you find the percent composition of CuBr2

Chemistry
1 answer:
Levart [38]2 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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10 moles of carbon dioxide has a mass of 440 g. What is the relative formula mass of carbon dioxide?
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Answer: 44g

Explanation: The formular for finding Moles is ;

Moles =  Mass / Molar Mass or Formular Mass.

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Making 'Formular Mass', subject of the formular; we thus have;

Formular mass = Mass / Moles = 440/ 10 = 44g

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