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MissTica
3 years ago
9

What does the number tell us about an atom that never changes

Chemistry
1 answer:
Leokris [45]3 years ago
6 0
The number that never changes is the atomic mass (atomic number on the periodic table)
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Calculate the amount (in moles) of gas which occupies 250cm³ at STP
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Answer:

0.01

Explanation:

volume of 22.4 L (22,400 ml) at s.t.p. 250 ml out of 22,400 ml is 0.01 rounded, therefore I assume that is the answer. About 0.01 mole occupies 250 cm3 at s.t.p.

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Choose all the answers that apply. Sulfuric acid is found in acid rain. Its chemical formula is H2SO4. Which of the following is
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What is released during cellular respiration?
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4 years ago
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3 years ago
HELPPP!!! What is the volume of a 1.31 moles sample of gas if the pressure is 904 mmHg and the temperature is 37. degrees Celsiu
Tju [1.3M]

Answer:

27.99 dm³

Explanation:

Applying

PV = nRT................ Equation 1

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From the question, we were aksed to find V.

Therefore we make V the subject of the equation

V = nRT/P................ Equation 2

Given: n = 1.31 moles, T = 37°C = 310K, P = 904 mmHg = (904×0.001316) = 1.1897 atm

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Substitute these values into equation 2

V = (1.31×310×0.082)/(1.1897)

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4 0
3 years ago
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