Chemistry: Water and Life Chapter 3 Quiz

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What is the molecular formula of water?

H3O

O2H

H2O (correct)

HO2

Which model represents the structure of water with higher electronegativity of the oxygen atom?

Bohr model

Space-filling model (correct)

Ball-and-stick model

Calotte model

How many hydrogen bonds are around each oxygen atom in water?

Three

One

Two (correct)

Four

What property of water contributes to Earth's suitability for life?

Ability to support hydrogen bonds Signup and view all the answers

What is the measure of how hard it is to break the surface of a liquid?

Surface tension Signup and view all the answers

What is the specific heat of water?

1 cal/g/ºC Signup and view all the answers

What process causes the cooling effect when a liquid evaporates?

Evaporative cooling Signup and view all the answers

Why does ice float in liquid water?

Hydrogen bonds in ice are more ordered Signup and view all the answers

What makes water a versatile solvent?

Its polarity and ability to form hydrogen bonds easily Signup and view all the answers

What is the measure of the total amount of kinetic energy due to molecular motion?

Temperature Signup and view all the answers

What is the attraction between water and other substances called?

Adhesion Signup and view all the answers

What is a liquid that is a homogeneous mixture of substances called?

Aqueous solution Signup and view all the answers

What is the heat a liquid must absorb for 1 g to be converted to gas called?

'Heat of vaporization' Signup and view all the answers

What helps transport water against gravity in plants?

'Cohesion' Signup and view all the answers

'Insulation of Bodies of Water by Floating Ice' is an example of:

'Floating of Ice on liquid water' Signup and view all the answers

What is the measure of the amount of heat that must be absorbed or lost for 1 g of a substance to change its temperature by 1ºC?

Specific heat Signup and view all the answers

What property of water allows it to resist changing its temperature?

Moderation of temperature Signup and view all the answers

What effect does warmer temperatures in the Arctic have on sea ice?

It causes the sea ice to melt more in the summer Signup and view all the answers

What is the main reason for ice floating in liquid water?

More ordered hydrogen bonds in ice Signup and view all the answers

Which of the following contributes to the versatility of water as a solvent?

Polarity allowing easy formation of hydrogen bonds Signup and view all the answers

What is the process by which water can stick to other molecules and make a hydrogen bond called?