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S_A_V [24]
2 years ago
13

Mass=35g density=5 g/cm3 what is the volume?

Chemistry
2 answers:
krek1111 [17]2 years ago
6 0

\large \mathfrak{Solution : }

given values :

mass = 35 g

density = 5 g/cm³

we know that :

  • \boxed{density =  \dfrac{mass}{volume} }

  • 5 =  \dfrac{35}{vol}

  • vol =  \dfrac{35}{5}

  • volume = 7 \: cm {}^{3}  \: or \: 7 \: litres
sladkih [1.3K]2 years ago
3 0

Answer:

You would divide the mass by the density. The volume would be 7 cm^3.

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What is the empirical formula for a compound which contains 67.1 zinc and the rest is oxygen
wolverine [178]

Answer:

The empirical formula is ZnO2

Explanation:

What is the empirical formula for a compound which contains 67.1% zinc and the rest is oxygen?

Step 1: Data given

Suppose the compound has a mass of 100.0 grams

A compound contains:

67.1 % Zinc  = 67.1 grams

100 - 67.1 = 32.9 % oxygen  = 32.9 grams

Molar mass of Zinc = 65.38 g/mol

Molar mass of O = 16 g/mol

Step 2: Calculate moles of Zinc

Suppose the compound is 100 grams

Moles Zn = 67. 10 grams / 65.38 g/mol

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Step 3: Calculate moles of O

Moles O = 32.90 grams / 16.00 g/mol

Moles O = 2.056 moles

Step 4: Calculate mol ratio

We divide by the smallest amount of moles

Zn: 1.026/1.026 = 1

O: 2.056/1.026 = 2

The empirical formula is ZnO2

To control this we can calculate the % Zinc for 1 mol

65.38 / (65.38+2*16) = 0.67.1 = 67.2 %

7 0
2 years ago
Please help! Please try and give me a long answer. Thanks!
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I found this for your question

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3 years ago
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