3 years ago

A 22.4-L sample of which of the following substance, at STP, would contain 6.02 x 10^23 representative particles?

1 answer:

6 0

It would have to be carbon dioxide, the only gas listed. For gases, 1 mole of particles occupies 22.4 L of volume at STP.

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Adding vinegar to baking soda will cause a chemical reaction. Which of these will speed up the reaction?

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3 years ago

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saw5 [17]

Answer:

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Explanation:

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Strike441 [17]

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3 years ago

Cal is titrating 50.8 mL of 0.319 M HBr with 0.337 M Ba(OH)2. How many mL of Ba(OH)2 does Cal need to add to reach the equivalen

alexgriva [62]

Answer:

$V_{base}=24.04mL$

Explanation:

Hello!

In this case, according to the chemical reaction by which HBr reacts with Ba(OH)2:

$2HBr+Ba(OH)_2\rightarrow BaBr_2+2H_2O$

We can see there is a 2:1 mole ratio between the acid and the base; thus, at the equivalent point we can write:

$2M_{base}V_{base}=M_{acid}V_{acid}$

Therefore, for is to compute the volume of the used base, we proceed as shown below:

$V_{base}=\frac{M_{acid}V_{acid}}{2M_{base}}$

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$V_{base}=\frac{0.319M*50.8mL}{2*0.337M}\\\\V_{base}=24.04mL$

Best regards!

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3 years ago

A gas at 74°C is heated to 120°C so there is pressure reaches 1.79 ATM. What is its initial pressure?

Leona [35]

Explanation:

here's the answer to your question

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3 years ago