final exam semester one review
TRANSCRIPT
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-