Atoms & Numbers
Write 52,600,000 in scientific notation
5.26 * 107
Balance the following reaction:
K2O + CaCl2 --> CaO + KCl
K2O + CaCl2 --> CaO + 2KCl
1.8 moles of NaCl is dissolved to make 2.5 L of solution. What is the molarity?
0.72 M
5.0 moles of sulfuric acid H2SO4 has what mass?
490 g
What is chemistry?
The study of matter
Write the electron configuration of oxygen
1s2 2s2 2p4
You are burning propane using the following balanced reaction:
C3H8 + 5O2 --> 3CO2 + 4H2O
If 3.5 moles of H2O are produced, how many moles of O2 were consumed?
4.4 moles O2
A soccer ball is inflated to 220 kPa at 305K. It is then taken outside where the temperature is 270K. What is the new pressure?
195 kPa
If [H3O+] = 4.0*10-4 M, what is [OH-]?
[OH-] = 2.5*10-11 M
Draw the electron dot and ion formed for Calcium
Ca **
Ca+2
What is the molar mass of CO2?
44.009 g/mol
Balance the following reaction:
C4H8 + O2 --> CO2 + H2O
C4H8 + 6O2 --> 4CO2 + 4H2O
A NaCl solution has molarity of 1.2M, and volume of 750 mL. How many moles of NaCl are there?
0.90 mol NaCl
If [H3O+] = 4.0*10-4 M, what is pH?
pH = 3.4
Draw the electron dot structure of CO2
O=C=O
Convert 0.45 km to mm
450,000 mm
Balance the following reaction:
C3H6 + O2 --> CO2 + H2O
2C3H6 + 9O2 --> 6CO2 + 6H2O
A gas is 4.5 L at 140 kPa and 300K. How many moles are there?
0.253 moles
List all three states of matter and the name for each change in state of matter
Solid, liquid, gas
Melting, freezing, vaporization, condensation, sublimation, deposition
What is the definition of absolute zero, and what is its value in Celsius and Kelvin?
The lowest temperature possible, where atoms stop moving
-273 C 0K
What is the molar mass of Al2(SO4)3?
342.15 g/mol
You are burning propane using the following balanced reaction:
C3H8 + 5O2 --> 3CO2 + 4H2O
If 35 grams of C3H8 are consumed, how many moles of CO2 were produced?
2.38 moles CO2
A gas has volume 4.8L at 220kPa and 290K. It is then compressed to 2.8L at 310K. What is the new pressure?
403 kPa
If [OH-] = 2.5*10-10 M, what is pH?
pH = 4.4
List the three particles that make up atoms, including their charge, mass, and locations
Neutron 0 1amu nucleus
Electron -1 1/2000amu electron cloud