How many moles are 3. 01 x 1022 atoms of magnesium?

Chemistry

1 answer:

hram777 [196]2 years ago

3 0

Answer:

0.05 moles

Explanation:

There are about 6.02 * 10^23 atoms in a mole, so in the given sample, there are (3.01*10^22)/(6.02*10^23)=(1/2)(1/10)=0.05 moles.

You might be interested in

Which of the following contains the most atoms?

liberstina [14]

Answer:

D) 21.62 B

Explanation:

I took a quiz and it says that D is correct. Sorry I couldn't be of more assistance.

6 0

3 years ago

Which part of the amino acid helps identify features that differentiate one amino acid from another

Natasha_Volkova [10]

The part of the amino acid which helps to identify features that differentiate one amino acid from another is the SIDE CHAIN OF EACH AMINO ACID.
Amino acids are made up of five basic parts, these are:
1. A central carbon atom
2. A hydrogen atom
3. An amino group
4. A carboxyl group and
5. A R group, also known as a side chain.
The side chain distinguishes one amino acid from the other; different amino acids have different side chains.

6 0

3 years ago

Answer with explanation and you’ll get brain list

Gwar [14]

Answer:

Option D.

Explanation:

6H₂ + P₄ → 4PH₃

First we convert the given reactant masses into moles, using their respective molar masses:

4.00 g H₂ ÷ 2 g/mol = 2 mol H₂

6.20 g P₄ ÷ 124 g/mol = 0.05 mol P₄

0.05 moles of P₄ would react completely with (6*0.05) 0.3 moles of H₂. There are more H₂ moles than required, meaning H₂ is in excess and P₄ is the limiting reactant.

Now we calculate how many PH₃ moles could be formed, using the number of moles of the limiting reactant: