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Citrus2011 [14]
3 years ago
12

37.2 moles of hydrogen gas would have what mass? Your answer

Chemistry
1 answer:
raketka [301]3 years ago
5 0

Answer:

74.99g

Explanation:

Mass of a substance can be calculated by using the formula;

mole = mass ÷ molar mass

mass = molar mass × mole

According to this question, 37.2 moles of hydrogen gas is given.

Molar mass of hydrogen gas (H2) = 1.008(2) = 2.016g/mol

mass = 2.016 × 37.2

Mass of H2 = 74.995

Mass = 74.99g

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Explanation:

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Why is potassium permanganate, without any d electrons, bright purple in color?
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Explain what is in a buffer. Discuss the function of a buffer. How will pH change when small amounts of acids or bases are added
AnnyKZ [126]

Answer:

Is a substance that can maintain  certain range of pH

Explanation:

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3 years ago
(4.1357 x 10^-15) x (5.4 x 10^2) Answer must be in scientific notation
nadya68 [22]

Answer:

22×10⁻¹³

Explanation:

Scientific notation:

Scientific notation is the way to express the large value in short form.

The number in scientific notation have two parts.

The digits (decimal point will place after first digit)

× 10 ( the power which put the decimal point where it should be)

for example the number 6324.4 in scientific notation will be written as = 6.3244 × 10³

When we multiply or divide the values the number of significant figures must be equal to the less number of significant figures in given value.  Thus, in given value,

(4.1357× 10⁻¹⁵) × (5.4×10²)

22×10⁻¹³

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