Answer:
<h2>Density = 2700 g/L</h2>
Explanation:
Density of a substance can be found by using the formula

From the question
volume = 0.015 L
mass = 40.5 g
Substitute the values into the above formula and solve for the Density
That's

We have the final answer as
Density = 2700 g/L
Hope this helps you
Answer : The correct option is, 
Explanation :
Amino acid : The acid that contains two functional groups that are carboxylic group,
and ammine group,
.
When the two or more that two amino acids join together with the help of peptide bond, they produces polypeptide chain or protein.
The bond present between the two amino acid is called a peptide bond.
The peptide bond is a chemical bond that is formed between the two molecules when the nitrogen of one amino acid react with the carbon of another amino acid by releasing a water molecule. This is a dehydration synthesis or condensation reaction.
From this we conclude that, only two functional groups carboxylic group,
and ammine group,
are present in all amino acids.
Hence, the correct option is, 
Decomposition is the example of a reaction in which hydrogen and oxygen are produced by running an electric current through water.
Decomposition of water through electrolysis of water into oxygen and hydrogen gas due an electric current passed through water. when an electric current is passed through water, oxygen gas is being produced at the anode and hydrogen gas is produced at the cathode.
Answer:
if you add a neutron to lithium-7 it becomes a compound nucleus of lithium-8