The mass of one mole of atoms of an element is the
molar mass
100
How many nickels are in $22.55?
451
100
What part of the atom did Rutherford not account for?
Neutrons
100
When is Mole Day?
Oct. 23rd
200
How many sig figs in 5020?
three
200
An atom that has had 2 electrons removed is a(n)
cation
200
12.0 cm = _________ Km
0.00012
200
What is the mass of Bromine-37?
37
200
How many moles of carbon are in Carbon dioxide?
one
300
4.3 + 12.75 =
17.1
300
Mercury (III) oxide will decompose when exposed to oxygen. This is an example of an ______ property.
intensive
300
How many grams of aluminum are in a coke can that has a density of 2.7 g/cm^3 and a volume of 3 cm^3
8.1 grams
300
If 95% of an isotope has a mass of 50, 3% of an isotope has a mass of 40 and 2% has a mass of 30, which isotopic mass would be most represented?
50
300
How many atoms are in 1.50 moles of Na?
9.03 x 10^23
400
76 x 30. =
2300
400
If 34 g of Na are combined with 22 g of Cl, how many grams of NaCl will be produced?
56
400
An archer ever never gets a bull's eye and but always hits in the same quadrant. This archer is
precise but not accurate
400
How many neutrons in a neutral atom with 25 electrons?
30
400
How many moles are in 34 x 10^27 molecules of water?
5.7 x 10^4
500
6.02 x 10^23 X 1734 =
1.04 x 10^27
500
How many dots are on the Lewis Dot diagram for Selinium?
6
500
If a balance scale measures to the tenth place, to what place do you report?
hundreths
500
If argon-36 naturally occurs 0.337% of the time and argon-38 occurs naturally 0.063% of the time, what % of the time does argon-40 occur? (there are only 3 isotopes of argon)
99.6%
500
How many atoms of Oxygen are in 5.00 moles of Barium Nitrate, Ba(NO3)2