3 years ago

Help

Chemistry

1 answer:

Archy [21]3 years ago

8 0

A, B & C would all be correct.

You might be interested in

What is the percent by mass of oxygen in al2o3 ?

Snezhnost [94]

mr oxygen= 16. 16 x 3= 48
mr Al2O3= 27 + 27 + 48= 102

(48/102) X 100%= 47.05% oxygen

4 0

4 years ago

How does a lightning rod protect a<br> building from lightning damage?

LiRa [457]

Answer:

The lightning rod attracts lightning and is not connected to any other pieces of metal that may harm any electrical circuits.

Explanation:

I hope this helps, I tried my best to explain it quickly for you.

7 0

3 years ago

Read 2 more answers

What is your dream job or ideal lifestyle?

blondinia [14]

My dream job is to create my own business and become my own boss

7 0

3 years ago

The density of water at 400C is 0.992 g/mL What is the volume of 27.0 g of water at this temperature?

pantera1 [17]

Answer:

Volume of water at this temperature is 27.2 mL

Explanation:

We know that $density=\frac{mass}{volume}$

Here density of water is 0.992 g/mL

Here mass of water is 27.0 g

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

= $\frac{27.0g}{0.992g/mL}$

= 27.2 mL

7 0

4 years ago

Select the correct answer. What is the percent composition of silicon in silicon carbide (SiC)? A. 28% B. 50% C. 70% D. 142%

Nadya [2.5K]

Answer:

C. 70%

Explanation:

Atomic Mass of the silicon = 28 g.

Atomic mass of the Carbon = 12 g.

Total mass of the Silicon Carbide = 28 + 12

= 40 g.

Now, Using the formula.

% Composition = Mass of the silicon/Total mass of the compound × 100 %

= 28/40 × 100 %

= 70 %

Hence, % composition of the silicon in SiC is 70%

7 0

3 years ago