4 years ago

20 points

Chemistry

1 answer:

poizon [28]4 years ago

5 0

Answer:

1, 4, 1,5

Explanation:

1 PCl5 + 4 H2O → 1 H3PO4 + 5 HCl

You might be interested in

Select the correct answer.

sergey [27]

I believe the correct answer is B

8 0

3 years ago

Which does not affect the rate of pulmonary and systemic gas exchange?

Readme [11.4K]

Answer:b

Explanation:

8 0

3 years ago

How many acetone molecules are in a bottle of acetone with a volume of 445 mL ? (density of acetone = 0.788 g/cm3).

Mkey [24]

<h2>Hello!</h2>

The answer is: $3.63x10^{24}particles$

First, we need to calculate the molecular weight of the acetone (CH3COCH3)

So,

$C=12.011g/mol\\O=15.99g/mol\\H=1.008g/mol$

Then,

$CH3COCH3=12.011+(1.008)*3+12.011+15.999+12.011+(1.008)*3=58.08g/mol$

Second, we need to calculate the mass of the acetone in the bottle

We need to remember that $1cm^{3}=1mL$

So,

$445cm^{3}*\frac{0.788g}{cm^{3}}=350.66g$

Third, we need to calculate the number of moles:

$350.66g*\frac{1mol}{58.08g}=6.03moles$

Fourth, we need to calculate the number of atoms:

Remember, $1 mol=6.022x10^{23}particles$

Therefore,

$6.03moles*\frac{6.022x10^{23}particles }{1mol}=3.63x10^{24}particles$

Have a nice day!

4 0

4 years ago

Read 2 more answers

Calculate the average mass of these three samples: 104.2g, 3.21g, 29.0g.

Nikitich [7]

When you add all of the numbers together, it equals 136.41. that divided by 3 = 45.47 which is the average

5 0

4 years ago

Read 2 more answers

After reading the list of physical properties above, you realize that they are describing a substance that is a

Alecsey [184]

The answer is B

Hope this helps!

5 0

3 years ago