CH1: Measurements
Prefix "micro" means ...
1,000,000 times smaller than the base unit
Is glass breaking a physical or a chemical change?
Physical
What is the electron configuration of Helium?
1s2
What is the atomic number of Helium?
2
In a Bohr Model, how many electrons can there be in the second energy level?
8
What is the base SI unit for electric current?
Ampere
Is glass malleable?
No
What is the electron configuration of Sulfur?
1s2 2s2 2p6 3s2 3p4
What is the atomic mass of Oxygen?
16
What is the molar mass of carbon dioxide?
44.01 g/mol
Convert 98.6 degrees Fahrenheit to Kelvin.
310.2 K
Is baking cookies a physical or a chemical change?
Chemical
What is the condensed electron configuration of Sr?
[Kr] 5s2
What is the symbol of Iron?
Fe
Molten lead hardening is a ____________ change.
Physical
Convert 57.66 mi/hr to m/s
25.77 m/s
Germanium's density is 5.323 g/cm^3. Its mass is 17.615 g. What is its volume?
3.309 cm^3
What is the electron configuration of Silver?
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d9
What element is Pb?
Lead
______________ form when substances combine without a chemical reaction occuring.
Mixtures
Convert 1 ft^3 to microliters.
28,300,000 microliters
Calculate the number of water molecules in a 1.00-liter bottle of water. (Density of water is 0.998 g/cm^3)
3.34 x 10^25 particles
Determine the percentage composition of AgNO3.
63.5% Ag
8.2% N
28.3% O
Helium and Argon
If photons have energies of E=1.816 x 10^-19 J, what is the wavelength of these photons?
1094 nm