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Aleksandr-060686 [28]
3 years ago
9

Which of the following is a quemical property ?

Chemistry
1 answer:
saveliy_v [14]3 years ago
8 0
One chemical property would be reactivity of a particular substance.
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What mass of Na2SO4 is needed to make 2.5L of 2.0M solution? (Na=23g; S=32g; O=16g)
zaharov [31]
The molar mass of Na₂SO₄ - 
2 x Na - 2 x23 = 46
1 x S - 1 x 32 = 32 
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total = 46 + 32 + 64 = 142 g/mol
the molarity of solution - 2.0 M 
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Therefore in 2.5 L - 2 mol/L x 2.5 L = 5 mol
then the mass of Na₂SO₄ required = 142 g/mol x 5 mol = 710 g
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Help me answer this chemistry question. thank you!
tatiyna

Answer:

78.85

Explanation:

To <u>calculate the average atomic mass of the isotopes </u>we use the <em>given masses and abundances</em>, as follows:

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In other words:

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So the answer is 78.85.

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Answer:

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Explanation:

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