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Simora [160]
2 years ago
7

Which of these scientist is know for his work in understanding climate change a : edwin hubble b : christian doppler c : warren

washington d : charles kuen kao
Chemistry
1 answer:
Airida [17]2 years ago
8 0
I would say Edwin Hubble
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Answer:

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What is the total number of moles represented by 20 grams of CACO3
Nutka1998 [239]

Answer:

B. 0.2.

Explanation:

  • We can use the relation:

<em>n = mass/molar mass</em>

mass of CaCO₃ = 20 g, molar mass of CaCO₃ = 100.0869 g/mol.

<em>∴ n = mass/molar mass = </em>(20 g)/(100.0869 g/mol) <em>= 0.1998 ≅ 0.2 mol.</em>

<em></em>

<em>So, the right choice is: B. 0.2.</em>

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3 years ago
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