Final exam review

12 molecules of water will contain _______ atoms H and _______ atoms oxygen.

24 12

The seven SI units are the mole, ___, ampere, kg, candela, _____ , second.

Kmeter

One mole of water weighs…

• 18 grams• And contains how many molecules??• 6.02 E 23• How many total atoms?• 6.02E23 times 3 = 1.8E24

True or false – Some atoms of oxygen weigh more than others.

• True – these are called ISOTOPES.

• They weigh more because they contain different numbers of what?

• Neutrons !

S P D and F are letters used in …

• A) electron configurations• B) energy calculations• C) gas law calculations• D) phase configurations

300 degrees Kelvin is _____ C.27

The chemical formula for calcium chloride is…

• CaCl2

What is this?

A really bad picture of a(n)

A) Beaker

B) Erlenmeyer flask

C) Volumetric pipet

D) Buret

E) Eudiometer

Carbon dioxide is a

• A) molecule• B) formula unit• C) element• D) metal

The mass number of fluorine is

• A) 19• B) 20• C) 9• D) 18.998

How many neutrons in a normal atom of BORON?

•SIX

How many protons in an atom of potassium?

• A) 19• B) 20• C) 988974• D) 39.098

What is the most likely isotope of lithium?

• A) one with 4 neutrons• B) one with 3 neutrons• C) one with 5 neutrons• D) one with no neutrons• E) one with 7 neutrons

Add these using sig figs WITHOUT a calculator.

12.08+3.002+4.9= 20.0

Is NaCl a formula unit or molecule?

Formula unit

Is O2 a formula unit or molecule?

molecule

Convert 12 mm to cm?

1.2

Name FeO

Ferrous oxide or Iron (ll) oxide

How many SIG FIGS in 120,050 ??

5

How many SIG FIGS in 0.002030 ??

4

How many SIG FIGS in 12.80 ??

4

What does ½ mole of carbon dioxide weigh?

22 grams

What do you get when you dissolve CaCl2 in water??

Ca+2 ions and2Cl- ions

What is the formula of calcium chlorate?

Ca(ClO3)2

How long is the line?

2.50 cm

What is the fuel burned in a Bunsen burner?

Methane, natural gas

If you have a “mad scientist” flame that is big and out of control and

yellow you need to adjust the ______ intake to make the flame

blue.

Air or oxygen

CaO is _________ __________.Calcium oxide

P2O is _________ __________.Diphosphorus monoxide

Mg + KCl yields __________.

NO REACTION

MgCl2 + KOH yields __________ as the precipitate.

Magnesium hydroxide

MgCl2 + KOH yields __________ as the spectator ions

K+ and Cl-