3 years ago

Please help me immediately I will mark you as brainiest.

Chemistry

1 answer:

IrinaVladis [17]3 years ago

5 0

There's 18 atoms in ammonium phosphate

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What is the amount of heat absorbed when the temperature of 75 grams of water increases from 20 to 75

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55°C

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3 years ago

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What is the volume (in dm3 of 1 mole of oxygen at 5 MPa and 200 K?

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Answer: The volume of oxygen gas is $0.332dm^3$

Explanation:

To calculate the volume of the gas, we use the equation given by ideal gas equation:

$PV=nRT$

where,

P = pressure of the gas = 5 MPa = 5000 kPa (Conversion factor: 1 MPa = 1000 kPa)

V = Volume of gas = 3.34 L

n = number of moles of oxygen gas = 1 mole

R = Gas constant = $8.31dm^3\text{ kPa }mol^{-1}K^{-1}$

T = Temperature of the gas = 200 K

Putting values in above equation, we get:

$5000kPa\times V=1mol\times 8.31dm^3\text{ kPa }mol^{-1}K^{-1}\times 200K\\\\V=0.332dm^3$

Hence, the volume of oxygen gas is $0.332dm^3$

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A gas has a volume of 3.00 L at 65.0 C. The same gas has a volume of 11.4 L at 105 C and 1725 mmHg. What was the original pressu

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After three half-lives of an isotope, 1 billion (⅛) of the original isotope’s atoms still remain in a certain amount of this ele

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You would expect 500 million atoms to be present. When a source experiences a half-life, it is a point in which atoms have degraded to half what they used to be in mass. 1/2(1 billion) = 500 million

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