SMART Mania 6 Chemistry

Question 1

Which of the following describes the shape of an ammonia molecule?

Accepted Answer

Trigonalpyramidal

Question 2

Water molecules have lone pairs of electrons that repel bonding electrons.

Accepted Answer

True

Question 3

Evaporation and condensation rates in a closed container are the same.

Accepted Answer

A state in which the liquid/gas phases are in equilibrium

Question 4

Carbon tetrachloride (CCl4) is insoluble in water

Accepted Answer

True

Question 5

Which element is the most electronegative of all the elements?

Accepted Answer

F, fluorine

Question 6

The spaces between gas particles in air increase as the temperature of the air increases.

Accepted Answer

Relationship between volume and temp at constant pressure

Question 7

The molar mass of H2SO4 is more than twice the molar mass of NaOH

Accepted Answer

True

Question 8

Which species is classified as an insoluble salt?

Accepted Answer

AgI(s)

Question 9

When this equation is balanced with (lowest whole numbers) the coefficient for O2

Accepted Answer

9

Question 10

Particles vibrate faster and faster until some break from their fixed positions and move freely

Accepted Answer

Solid phase changing to the liquid phase

Question 11

Water molecules are distributed more randomly in the gaseous state than in the liquid state

Accepted Answer

True

Question 12

Which aspect of the graph provides the best evidence that the reaction is exothermic

Accepted Answer

The energy difference between points 1 and 3

Question 13

Sodium and chlorine have different properties

Accepted Answer

True

Question 14

When magnesium (Mg) reacts with chlorine (Cl) the atoms combine in a 1 to 2 ratio to form MgCl2

Accepted Answer

True

Question 15

Which element often forms compounds in which it has four covalent bonds?

Accepted Answer

C, carbon

Question 16

Water molecules contain polar bonds and have an asymmetric shape.

Accepted Answer

True

Question 17

Evaporation of water results in an increase in entropy

Accepted Answer

True

Question 18

Which one of these properties decreases when moving left to right across a period (of the PT)

Accepted Answer

Atomic radius

Question 19

Water molecules have a bent shape.

Accepted Answer

True

Question 20

Which species is acting as a reducing agent?

Accepted Answer

Zn(s)

Questions 20