Question 4 The box below shows a list of chemical formulas.

I. C6H1206

II. AI(CO2)3

III. Si(HCO3)4

IV. Al(C2H302)3

V. K2SO4

Which of these formulas contain equal numbers of oxygen atoms?

Answer

F Formulas I and III

G Formulas I and IV

H

Formulas I, II, and III

J Formulas I, II, and IV

a:

by the combination of an unlimited number of elements

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.

here is table 2-2:

country

percent of eligible voters that voted

rank

united states

44.9%

138

canada

60.1%

107

costa rica

84.6%

14

hungary

66.9%

82

japan

57.0%

118

egypt

27.7%

159

south africa

85.5%

10

ans is no, the data set cannot be plotted as a single circle graph