Chemical equations are equations that show that the chemical formulas of a substance that has been reacted and/or produced.
Answer:
the oil spreads to cover the water
The composition of a compound does not vary because it is made up of fix ratio by mass.
<h3>What is compound?</h3>
A compound is a chemical substance that is composed of more than one element that held together by chemical bonds and produces fix ratio by mass so we can conclude that the composition of a compound does not vary because it is made up of fix ratio by mass.
Learn more about compound here: brainly.com/question/634206
Ionic bonds generally have higher melting points due to stronger electrostatic interactions.
In chemistry for an chemical equation to be complete it has to be balanced using appropriate coefficients and state symbols such similar atoms are equal in both sides of the equation. The reaction between hydrogen sulphide and oxygen gas yields sulphur iv oxide and water as indicated by equation.
2H2S (g) + 3O2 (g) = 2SO2(g)+ 2H2O(l).
therefore the correct answer is 2,3,2,2
