Reactions
Exothermic
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
Basic
What is dihydrogen monoxide?
Water
In the reaction 2HBr-----> H2 + 2Br If I have 17 moles of HBr, how many moles of H2 will form?
8.5 moles
Is Li2O soluble?
Yes
Is HNO3 an acid or a base?
Acid
What is dry ice made of?
Carbon dioxide
Explain why increasing temperature usually increases the rate of a reaction
The molecules move faster, allowing them to collide faster/harder, increasing the chemical reaction rate
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
Draw a beaker with Mg(NO2)2 dissolved in it
See drawing
Describe three properties of an base
Tastes bitter, slippery, reacts with acid to form salt and water
Why is mars red?
Rust
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
What is the pOH of a solution with a H+ concentration of 4.5 x 10-6
8.66
1
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 H2F interacting. Identify the partial positive and negative areas of one molecule AND what is the strongest intermolecular force present.
see picture, hydrogen bonding
Give the products of the following acid/base reaction.
CH2O2- + HCl
CH3O2 + Cl-
What metal will melt in the palm of your hand?
Gallium