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fomenos
3 years ago
8

How many C atoms are there in a sample of C,H, that contains 6.59 x 1026 H atoms?

Chemistry
1 answer:
Flauer [41]3 years ago
4 0

Answer:

bill gates

Explanation:

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A car is traveling 70km in 45 minutes. How many miles an hour is the car traveling?
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52

Explanation:

70x45÷60= 52

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Nicaragua experienced a drought in 1987 following warmer than average water temperatures in the eastern pacific. What likely cau
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3 years ago
Consider 2H2 + O2 → 2H2O. To produce 1.2 g water, how many grams of H2 are required? Report to the correct number of significant
Elden [556K]

Answer:

0.133 mol (corrected to 3 sig.fig)

Explanation:

Take the atomic mass of H=1.0, and O=16.0,

no. of moles = mass / molar mass

so no. of moles of H2O produced = 1.2 / (1.0x2+16.0)

= 0.0666666 mol

From the equation, the mole ratio of H2:H2O = 2:2 = 1:1,

meaning every 1 mole of H2 reacted gives out 1 mole of water.

So, the no, of moles of H2 required should equal to the no, of moles of H2O produced, which is also  0.0666666 moles.

mass = no. of moles x molar mass

hence,

mass of H2 required = 0.066666666 x (1.0x2)

= 0.133 mol (corrected to 3 sig.fig)

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How many oxygen molecules are produced when 3.2×1022 molecules of water decompose?
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