Chemistry and water

Question 1

Which of the following would be less dense?

Accepted Answer

an ice cube

Question 2

Water’s high heat capacity or high specific heat makes it

Accepted Answer

resist temperature change

Question 3

What is the charge of a neutron?

Accepted Answer

0

Question 4

As a substance cools off, its molecules move faster.

Accepted Answer

FALSE

Question 5

How many electrons can fit in the first shell of an atom?

Accepted Answer

2

Question 6

Temperature increases when kinetic energy _____________?

Accepted Answer

increases

Question 7

How many protons does sodium have?

Accepted Answer

11

Question 8

Define solution

Accepted Answer

Mix that forms when one substance evenly dissolves in another

Question 9

polar or nonpolar?

Accepted Answer

polar

Question 10

Oxygen is "happy" with this many outer electrons

Accepted Answer

8

Question 11

Mass Number is

Accepted Answer

p+ + n0

Question 12

To find the number of neutrons...

Accepted Answer

subtract the atomic number from the mass number

Question 13

Ice floats because

Accepted Answer

hydrogen bonding spaces the molecules farther apart; less dense structure

Question 14

How many electrons can fit in the third shell of an atom?

Accepted Answer

18

Question 15

Polarity refers to

Accepted Answer

opposite charges on two parts of a molecule

Question 16

Which of the following is NOT one of the four most common elements that make up 90% of living things?

Accepted Answer

calcium

Question 17

A pH of 7 is....

Accepted Answer

Neutral

Question 18

Salt water freezes before fresh water in the same location.

Accepted Answer

FALSE

Question 19

When chlorine gains an electron to become a ion, its charge is....

Accepted Answer

-1

Question 20

The chemical formula for sodium chloride is...

Accepted Answer

NaCl

Question 21

What is the charge on an electron?

Accepted Answer

-

Question 22

Waters adhesive and cohesive properties are a result of its __________.

Accepted Answer

polarity

Question 23

A negatively charged ion is called

Accepted Answer

Anion

Question 24

What is the charge of a proton?

Accepted Answer

+

Question 25

Sharing electrons unevenly is called

Accepted Answer

Polar covalent

Question 26

The “universal solvent” property

Accepted Answer

all of these

Question 27

Substances with a low pH value

Accepted Answer

are acidic.

Question 28

Ionic bonds ___________ electrons.

Accepted Answer

transfer

Question 29

How many hydrogen atoms are in water (H2O)

Accepted Answer

2

Question 30

Adding salt to water

Accepted Answer

lowers freezing pt & raises boiling pt

Question 31

The pH level of a given substance is determined by

Accepted Answer

the concentration of H+

Question 32

What is a charged atom (one that has lost or gained electrons) called?

Accepted Answer

Ion

Question 33

What is a positively charged ion called?

Accepted Answer

cation

Question 34

When oxygen become an ion, it wants to...

Accepted Answer

Gain electrons

Question 35

double bonds share...?

Accepted Answer

4 electrons

Question 36

The pH of water is...

Accepted Answer

pH=7

Question 37

Bases have a pH of...

Accepted Answer

>7

Question 38

Bases have a pH of...

Accepted Answer

>7

Question 39

When adjacent water molecules stick to each other, it is because they are forming __________.

Accepted Answer

hydrogen bonds

Question 40

In an ionic bond, atoms...

Accepted Answer

Donate/receive electrons from/to their outermost shell

Question 41

Ice floats because its H bond lattice has spaces that are _____ than those in a water lattice.

Accepted Answer

farther apart

Question 42

What is evaporation?

Accepted Answer

The heat from the sun causes the water to turn into vapor.

Question 43

Most of Earth's water is found in

Accepted Answer

Ocean

Question 44

You will get hypothermia faster in 60 F water than in 60 F air.

Accepted Answer

TRUE

Question 45

Water is polar because...

Accepted Answer

O attracts electrons more than H

Question 46

What is Sublimation

Accepted Answer

The change from solid to gas

Question 47

How many electrons does hydrogen have?

Accepted Answer

1

Question 48

Both _______ and ________ can affect density of water.

Accepted Answer

temperature and salinity

Question 49

What is the atomic number for calcium?

Accepted Answer

20

Question 50

What does the chemical symbol C stand for?

Accepted Answer

Carbon

Question 51

Compared to inland climates, coastal communities will generally be

Accepted Answer

cooler in the summer & milder in winter

Question 52

Water’s high heat capacity is largely due to

Accepted Answer

making and breaking of hydrogen bonds

Question 53

When sodium loses one electron, what is its ionic charge?

Accepted Answer

+1

Chemistry and water

Questions 53

Chemistry and water

Questions 53