Law of Conservation of Mass
18 g of Be combines with 32g O2 completely. What mass of BeO forms?
50g
What is the frequency of a wave if its wavelength is 1.82x10-6m?
1.61x1014s-1
The element Thrasine has two isotopes, thrasine-104 with a a mass of 104.076 amu and thrasine-108 with a mass of 108.150 . Thrasine is made up of 57.56% of thrasine-104 and 42.44% of thrasine-108. What is the average atomic mass of thrasine?
105.81 amu
An object has a density of 1.22 g/cm3 and a mass of 2.77g. What is its volume?
2.27 cm3
These are 3 dimensional areas where electrons are located.
Orbitals
AB + CD--> AD + CB
If 25 g AB reacts with 29g Cd and 12g AD forms, what mass of CB forms?
42g
What is the energy of a wave with a frequency of 2.92x1017s-1?
1.93x10-16J
The element Osagen has two isotopes, osagen-84 with a a mass of 83.783 amu and osagen-85 with a mass of 84.931 . Osagen is made up of 48.13% of osagen-84 and 51.87% of osagen-85. What is the average atomic mass of osagen?
84.38 amu
A liquid has a density of 13.6 g/mL and a volume of 15 mL. What is the mass of the liquid?
204 g
These are the starting substances in a chemical reaction.
reactants
2KI + CaCl2 --> 2KCl + CaI2
If 148g KCl and 294g CaI2 form, what mass of reactants reacted?
442g
What is the energy of a wave with a wavelength of 2.83x10-5m?
7.02x10-21J
The element Durkium has two isotopes, durkium-18 with a a mass of 18.085 amu and durkium-20 with a mass of 19.525 . Durkium is made up of 73.81% of durkium-18 and 26.19% of durkium-20. What is the average atomic mass of durkium?
18.46 g
A graduated cylinder contains 30 mL of water. 16g of a solid is added and the volume rises to 31.5 mL. What is the density of the solid?
10.67 g/mL
This describes when all measurements in an experiment are close in value to one another.
precision
B + Cl2 --> BCl3
If 22 g B reacted to form 234g BCl3, what mass of Cl2 reacted?
212 g Cl2
If 1x106 Hz= 1 MHz, what is the wavelength of a radio station with a frequency of 95.1 MHz?
3.15m
Average atomic mass is the weighted average of the masses of the _________________ of an element.
isotopes
A graduated cylinder has a mass of 45g. 17 mL of a liquid is added and the mass of the cylinder and liquid is 60g. What is the density of the liquid?
0.88 g/mL
Which has higher frequency?
red light or ultraviolet?
ultraviolet
P + Cl2 --> PCl5
If 416g PCl5 forms when 355g Cl2 reacts, what mass of P reacted?
61g
If 1x109nm = 1m, what is the wavelength in nanometers of a wave with energy of 2.84x10-19 J?
699.93 nm
The element Krugruth has two isotopes, krugruth-37 with a a mass of 36.503 amu and krugruth-39 with a mass of 38.554 . Krugruth is made up of 0.12% of krugruth-37 and 99.88% of krugruth-39. What is the average atomic mass of krugruth?
38.55
15g of salt are dissolved in 105g of water. The volume of the solution is 116mL. What is the density of the solution?
1.03g/mL
This is the energy associated with the loss of an electron in an atom.
ionization energy