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3 years ago

An atom has 32 protons, 40 neutrons, and 32 electrons. What is the charge of the atom’s nucleus?

1 answer:

8 0

The charge is neutral.

To find the charge, subtract the number of electrons from the number of protons. Because they are the same, there is no charge.

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For the balanced equation shown below, if the reaction of 0.112 grams of

Alekssandra [29.7K]

Answer:

The answer is 74.5%.

Explanation:

As we know that % yield= $\frac{actual yield}{theoretical yield}$ x 100%.

Therefore,

Step 1 Calculate Theoretical yield:

0.112 $H_{2}$ x $\frac{1 mol H_{2} }{2.016 g of H{2} }$ x $\frac{4 mol H_{2}O }{4 mol H_{2} }$ x $\frac{18.02 g H_{2}O }{1 mol H_{2}O}$ = 1.001 g $H_{2}O$

Now Step 2

% yield = $\frac{actual yield}{theoretical yield}$ x 100% = $\frac{0.745g}{1.001g}$ = 74.5%

8 0

4 years ago

I got the correct answer, but I don't know why. Could someone explain this to me?

MakcuM [25]

Answer:-

Option 2

Explanation:-

In a multi step reaction, the overall reaction is as fast as the slowest step only.

So the rate of a multistep reaction is the same as the rate of its slowest step.

The gas phase reaction was found to be second order wrt NO2.

So the slowest step must have 2 NO2 since the dependence is second order on NO2.

It was also found to be zero order wrt CO.

So the slowest step must not contain any CO since it’s presence has no effect on the reaction (zero order).

Among all options, only number 2 meets the two criterion

Thus the steps are

NO2 + NO2 – NO3 + NO (Slow)

NO3 + CO – NO2 + CO2 (Fast)

3 0

4 years ago

Acidic water can react with limestone to break the rock down and form caves in the Earth's surface. This is an example of ______

blagie [28]

Answer:

Filling in the blank, this is an example of <u>chemical weathering</u> which happens <u>to rocks</u> overtime.

Explanation:

Chemical weathering occurs when rocks are disintegrated by chemicals.

Rain water becomes acid rain when it reacts with carbon dioxide in the atmosphere (to form carbonic acid, HCO3).

When acidic rainwater falls and stays on rocks, chemical reactions take place with the minerals present in the rock, causing the rock to weather.

Areas with immense carbon dioxide and sulphur dioxide pollution increases rain water acidity, which in turn causes moisture in the atmosphere to dissolve these gases and produce acid rain.

7 0

4 years ago

Read 2 more answers

Please...................

Elena L [17]

I’m not sure but I hope someone tell you

I love you :( ❤️

8 0

3 years ago

How does oxygen obey the octet rule

Nitella [24]

Answer:

oxygen obey the octet rule when reacting to form compounds by adding 2 electrons.