All categories

3 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%

Chemistry

1 answer:

Nadya [2.5K]3 years ago

7 0

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%

You might be interested in

Which one of these is not an example of intercellular communication?

just olya [345]

Answer is a
bacteria doesn't have any cellular function in the cell.

7 0

3 years ago

The picture below shows a warm air mass caught between two cooler air masses. What is this type of front called? Plz, I really n

pentagon [3]

An occluded front forms when a warm air mass is caught between two cooler air masses.

6 0

3 years ago

What is the "reproductive system"

bija089 [108]

Answer: The reproductive system of an organism, also known as the genital system, is the biological system made up of all the anatomical organs involved in sexual reproduction

OMG LOL

6 0

3 years ago

Read 2 more answers

What is the limiting reactant for the following balanced equation when 9 moles of AlF3 are mixed with 12 miles of O2?

tamaranim1 [39]

<h2>Answer: $AlF_{3}$ </h2>

Explanation:

The chemical equation of the reaction that occurs when $AlF_{3}$ reacts with $O_{2}$ is

$4AlF_{3}+3O_{2}$ → $2Al_{2}O_{3}+6F_{2}$

$4$ moles of $AlF_{3}$ requires $3$ moles of $O_{2}$ .

$1$ mole of $AlF_{3}$ requires $\frac{3}{4}$ moles of $O_{2}$ .

Given that we have $9$ moles of $AlF_{3}$ .

$9$ moles of $AlF_{3}$ requires $\frac{3}{4}\times 9=6.75$ moles of $O_{2}$ .

But we have $12$ moles of $O_{2}$ .

So, $AlF_{3}$ will be consumed first.

So, $AlF_{3}$ is the limiting reagent.

3 0

3 years ago

A molecule of butane and a molecule of 2-butene both have the same total number of

pishuonlain [190]

1) same amount of carbon atoms.

That is why it is still called butane and butene.
but- always signifies 4 carbons

8 0

4 years ago

Read 2 more answers