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3 years ago

Help me please !!!!!!8th grade science

Chemistry

1 answer:

Alexus [3.1K]3 years ago

6 0

The Correct option is E. Chemical energy to Mechanical energy.

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What are the products in a neutralization reaction A. Two elements B.an acid and a base C. An element and a compound D. A salt a

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Acid + Alkali -> Salt + water

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How do you convert moles of a compound to mass?

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Divide the mass of the compound in grams by the molar mass you just calculated. The answer is the number of moles of that mass of compound

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3 years ago

1.42 mol sample of neon gas at a temperature of 13.0 °C is found to occupy a volume of 25.5 liters. The pressure of this gas sam

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Answer: 996 mmHg

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at NTP, weighs equal to the molecular mass and contains avogadro's number $6.023\times 10^{23}$ of particles.

According to the ideal gas equation:

$PV=nRT$

P = Pressure of the gas = ?

V= Volume of the gas = 25.5 L

T= Temperature of the gas = 13°C = (273+13) K = 286K

R= Gas constant = 0.0821 atmL/K mol

n= moles of gas= 1.42

$P=\frac{nRT}{V}=\frac{1.42\times 0.0821\times 286}{25.5}=1.31atm=996mmHg$ (760mmHg=1atm)

Thus pressure of this gas sample is 996 mm Hg.

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3 years ago

Why does permeable rock weather more than less permeable rock

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<span>Permeable means that a material is full of tiny, connected airspaces that allows water to seep through it.</span>

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