Definitions
What is a theory?
Convert to scientific notation:
837,000,000,000
8.37*1011
Convert 2.7 km to m
2700 m*
*must state units
If an atom has a charge of +2 and has 10 protons, how many electrons does it have?
8
What is magnesium chlorate?
Mg(ClO3)2
Smallest unit of an element that has the chemical properties of that element
What is an atom?
Convert to scientific notation:
0.0000000000017
1.7*10-12
How many seconds are in 13 minutes?
780 seconds*
*must state units
What is the mass number of a carbon isotope containing 8 neutrons?
14
What is the name for Ba(ClO3)2?
barium chlorate
A ratio of a substance's mass and volume
What is density?
How many significant figures?
138400.
6
Convert 65 mph to m/s, given 1 mi = 1609.34 m
29 m/s*
*must state units
How many atoms are in 3.0 grams of carbon?
1.5*1023 atoms
What is the name for N2O3?
dinitrogen trioxide
A measurement for volume.
What is a liter/cm^3/m^3?
Calculate
6*6 (measured)
40
A car travels 300 km in 4 hours. Convert its average speed to miles per hour. (1 mile = 1.609 km)
47 mph*
*must state units
An element has two isotopes: X-10 (10 g/mol, 60%) and X-11 (11 g/mol, 40%). Calculate its average atomic mass.
11 g/mol
What is the name for HClO4?
perchloric acid
6.022*10^23
What is avogadro's number?
Calculate.
3.5+(1300*0.183048)
240
The population of a city is 2.5 million. Each person drinks on average 2.0 L of water per day. How many gallons of water does the city consume per year? (1 gal = 3.785 L)
4.8*108 gallons/year*
*must state units
Give the number of protons, electrons, and neutrons for 3721X-.
protons = 21, neutrons = 16, electrons = 22
What is the formula mass for C3H8O?
60.1 g/mol