Answer:
In a chemical reaction, only the atoms present in the reactants can end up in the products. No new atoms are created, and no atoms are destroyed. In a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.
Answer:
I know that Aerogel is the lightest metal in existence, but I don't think it would help much with your answer. I mean you can give it a try?
Answer:
They are directly related.
Temp decrease then volume decrease
Temp increase then volume increase
Answer : +4
Explanation : Carbon's valency is +4.
Valency is defined as the combining or giving away power for required electrons of any element, especially it is measured by the number of hydrogen atoms which can be displaced or combined with.
In carbon which has 6 electrons in its atom. In first shell has 2 electrons and in the second shell 4 electrons are accommodated. It can either donate or accept 4 electrons in its valence shell. Most commonly the valency is +4.
A catalyst is something that is used to lower the activation energy of a reaction, that is later regenerated by the reaction (but the equilibrium isn't altered). In this case, an enzyme is an organic (protein) catalyst, so that's your answer.
