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3 years ago

1. Write equations for the reaction of sodium with water and with dilute acids. (2 marks)

Chemistry

1 answer:

alexandr402 [8]3 years ago

3 0

Answer:

See below, please.

Explanation:

With water

2Na+2H2O=2NaOH+H2 (gas)

With dilute acids

for example, HCl

2Na+2HCl=2NaCl+H2 (gas)

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1.00 L of a gas at STP is compressed to 473mL. What is the new pressure of gas?

Ratling [72]

Hello!

1.00 L of a gas at STP is compressed to 473 mL. What is the new pressure of gas?

We have the following data:

Vo (initial volume) = 1.00 L

V (final volume) = 473 mL → 0.473 L

Po (initial pressure) = 1 atm (pressure exerted by the atmosphere - in STP)

P (final pressure) = ? (in atm)

We have an isothermal transformation, that is, its temperature remains constant, if the volume of the gas in the container decreases, so its pressure increases. Applying the data to the equation Boyle-Mariotte, we have:

$P_0*V_0 = P*V$

$1*1 = P*0.473$

$1 = 0.473\:P$

$0.473\:P = 1$

$P = \dfrac{1}{0.473}$

$\boxed{\boxed{P \approx 2.11\:atm}}\:\:\:\:\:\:\bf\green{\checkmark}$

Answer:

The new pressure of the gas is 2.11 atm

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) How many moles are there in 2.00 x 10^19 molecules of calcium phosphate?

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Answer:

$\huge 3.322 \times {10}^{ - 5} \: \: moles \\$

Explanation:

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Hope this helps you

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3 years ago

1. Write equations for the reaction of sodium with water and with dilute acids. (2 marks)​

1. Write equations for the reaction of sodium with water and with dilute acids. (2 marks)