3 years ago

What energy is required for a reaction to occur?

Chemistry

1 answer:

kirza4 [7]3 years ago

5 0

Answer:

B. Activation Energy

Explanation: A P E X

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For the following reaction, 7.72 grams of nitrogen gas are allowed to react with 4.86 grams of oxygen gas . nitrogen(g) oxygen(g

inn [45]

There could be a big maximum amount or small, either works

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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:

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

And we plug in to obtain:

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

Best regards!

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3 years ago

What is the mass of a piece of iron if its density is 1.98 g/mL and its volume is 2.45 mL?

viktelen [127]

Answer:

4.858 g

Explanation:

Start with the formula

density = $\frac{mass}{volume}$

density = 1.98 g/mL

volume = 2.45 mL

mass = ??

rearrange the formula to solve for mass

(density) x (volume) = mass

Add in the substitutes and solve for mass

1.98 g/mL x 2.45 mL = 4.858 g

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3 years ago

A glass of water sitting in direct sunlight evaporates over time. Explain this phase change in terms of the types of heat transf

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This is a physical phase change it is still water it just separated and became less and less.it stays water though

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4 years ago

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DaniilM [7]

Answer:

the second one is it.

Explanation:

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4 years ago