The answer is 1. chemical change.
That is when one substance changes into one or more new substances, it has exhibited a chemical change.
A Chemical change is a change that takes places when a substance changes its composition by forming one or more new substances. As here also, one substance is changing into one or more new substance, thus it exhibits a chemical change.
Answer:
6.273×10²³
Explanation:
hope this is useful friend
Answer:
Thermal decomposition or cracking
Explanation:
Petroleum is a mixture of hydrocarbons which are usually formed naturally. Petroleum undergo a host of chemical reactions. One of such is thermal decomposition or cracking.
Cracking is used in the petroleum industry to covert heavy fractions to more useful lighter ones.
When petroleum is subjected to high temperature and pressure, and in the presence of catalyst, the long chain type of petroleum will decompose into more useful smaller and lighter molecules.
Example is given below:
C₁₅H₃₂ → C₈H₁₈ + C₃H₆ + 2C₂H₄
Answer:
The anser is C
Explanation:
This is because the fungi and bacteria are the decomposer, and their job is to decompose dead organism.
Answer:
74.10g/mol
Explanation:
The mass of one mole of Ca(OH)₂ is the molar mass of the compound.
To solve this problem, we add the atomic masses of the species in the compound;
Atomic mass of Ca = 40.078g/mol
O = 15.9994g/mol
H = 1.0079g/mol
So;
Molar mass = 40.078 + 2(15.9994 +1.0079 ) = 74.10g/mol
