Chemistry Past Questions and Answers

The volume occupied by 17g of H₂S at s.t.p. is [H = 1.00, S = 32.0, Molar volume = 22.4 dm³]

A 11.2dm ³
B 17.0 dm³
C 34.0dm ³
D 44.8dm ³

Question 1087:

Consider the reaction represented by the following equation: xKMnO _4(aq) + ySO_2(g) + zH₂O_(I) â†’ K ₂SO_4(AQ) + 2MnSO_4(aq) + 2H₂SO x,y and z are respectively

A 2,5 and 2
B 2,2 and 5
C 5, 1 and 2
D 1, 5 and 2

Question 1088:

What is the amount of magnesium that would contain 1.20 x 10²⁴ particles? [Mg = 24, Avogadro's constant = 6.02 x 10²³]

A 0.5 moles
B 2.0 moles
C 12.0 moles
D 24.0 moles

Question 1089:

The number of atoms in one mole of a substance is equal to the

A Mass number
B Oxidation number
C Atomic number
D Avogadro number

Question 1090:

Which of the following statements about a molar solution is correct? it

A Is a supersaturated solution
B Cannot dissolve more of the solute at that temperature
C Contains any amount of solute in a given volume of solution
D Contains one mole of the solute in 1 dm³ of solution