Stoichiometry
How many grams does one mole of Silicon (Si) weigh?
28.09
If the temperature of a gas increases, what happens to its volume?
It increases
In sweet iced tea, is sugar a solution, solute, or solvent?
Solute
How many electrons do atoms generally want to have?
8
What is avogadro's number?
6.02 x 10^23
In the reaction 2HBr-----> H2 + 2Br If I have 17 moles of HBr, how many moles of H2 will form?
8.5 moles
What state of matter has neither a consistent shape nor a consistent volume?
Gas
Is Li2O soluble?
Yes
Decomposition
What element are diamonds made of?
Carbon
How many molecules of NaCl are in 12.1 grams of NaCl?
1.25 x 10^23
If I have 4.3 liters of gas at 190 degrees Kelvin and I decrease the temperature of 175 degrees Kelvin, what is the new volume of the gas?
3.96 liters
Describe three properties of an acid
Tastes sour, forms H+ in solution, donates a H+, has a pH less than 7, reacts with bases to form water and salt, reacts with metal to form hydrogen gas
In a combustion reaction a hydrocarbon reacts with _______ to yield ________ and _______. Fill in the blanks
Oxygen, water, carbon dioxide
Who is generally acknowledged as the creator of the periodic table?
Mendeleev
Using the equation 4Al + 3O2 -----> 2Al2O3 If I have 35 grams of O2, how many grams of Al2O3 can I form?
74.35 grams
I have 6.2 grams of Neon gas at 0.5 atm of pressure in a 2.7 liter container. What is the temperature of the gas?
53.5 degrees Kelvin
How much water (in grams) is needed to make 119 grams of a 15% salt water solution?
101.15 grams of water
Balance the following reaction
Fe2O3 + C ----> Fe + CO2
2Fe2O3 + 3C ----> 4Fe + 3CO2
What is the chemical formula for ozone?
O3
Using the equation 2H2 + O2 -----> 2H2O If I have 8.0 grams of O2 and 8.0 grams of H2, how many moles of water can I form?
0.5 moles of water (O2 is the limiting reactant)
I have a container of gas at 60.7 kPa of pressure containing 1.2 mols of oxygen gas and 3.5 mols of hydrogen gas at a temperature of 299 kelvin. How big is the container?
192.6 liters
Draw three molecules of H2O interacting. Identify the partial positive and negative areas of one molecule AND what is the strongest intermolecular force present.
see picture, hydrogen bonding
Draw the lewis dot structure for NO3- AND identify the molecular geometry (shape)
See picture
What are the only two letters that does not appear in any of the atomic symbols on the periodic table?
J, Q