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fgiga [73]
3 years ago
12

What is the mass in grams of 2.05 X 10^20 molecules of oxygen gas?

Chemistry
1 answer:
lakkis [162]3 years ago
3 0

Answer:

So you should go and try to divide or smth or multiply

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Give the number of significant figures in this number: 2.110
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There is 3 significant numbers in 2.110.
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Which one of these elements was suggested as transition element by Mendeleev?
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Calculate the mass of arsenic(III) chloride produced when 0.150 g of arsenic reacts with excess chlorine according to the equati
adell [148]

Answer:

0.363 g

Explanation:

2As + 3Cl₂      →   2AsCl₃

calculate the number of moles of arsenic

Number of moles = mass/ molar mass

Number of moles =  0.150 g/ 75 g/mol

Number of moles = 0.002 mol

compare the moles of arsenic with arsenic chloride.

                         As             :             AsCl₃

                          2              :                2

                        0.002        :              0.002

Mass of arsenic chloride produced:

Mass = number of  moles × molar mass

Mass = 0.002 × 181.28 g/mol

Mass = 0.363 g

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3 years ago
If a concentration had X number of compounds and its concentration was 7 mol/L, if
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So the high iron and magnesium would be darker than the low iron and magnesium.
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