Stoich and Types of Reactions
Write the general equation for a single replacement reaction
A + BX --> B + AX
18.5 kPa
What would be the appropriate polarity of a solute that needed to be dissolved in a nonpolar solvent
Nonpolar because 'like dissolves like'
The half life of a radioactive isotope is 13 days. If I start with 80 grams of the isotope, how much will remain after 39 days?
10 grams
NH3 + H2O --> NH4+ + OH-
What is the original acid and its conjugate base?
H2O and OH-
2Mg + O2 --> 2MgO
If 2 moles of Mg and 2 moles of O2 react, what will remain after the reaction?
2 moles of MgO and 1 mole of O2
When comparing equivalent quantities of H2 and He at the same temperature, which will effuse most rapidly?
H2
What intermolecular forces exist within a molecule of NF3
LDF, and dipole-dipole forces
If Polonium-200 releases one alpha particle and one gamma ray, what isotope will exist after the transmutation?
Lead-196
If the [OH-] is 1.0x10-4, what is the pH?
10
Write the balanced skeleton equation that represents solid carbon reacting with chlorine gas to produce carbon tetrachloride
C + Cl2 --> CCl4
What type of substance is less soluble in hot water than in cold water
a gas
What is the name for a chemical process that absorbs heat
endothermic
In an exothermic reaction at equilibrium, what is the effect of raising the temperature
The reaction will shift toward the reactants
What distinguishes a strong acid?
100% ionization
What is the sum of the coefficients for the unbalanced combustion equation shown below:
C3H8 + O2 --> CO2 + H2O
13
If the volume of a container of gas is increased, what will happen to the pressure inside the container
It will decrease
What happens to the temperature of a substance during a phase change
it stays the same
Which type of nuclear radiation has the least penetrating power
alpha
If the [OH-] is greater than the [H+] is the solution acidic or basic?
basic
If 9 g of H2 reacts with 9 g of O2, how many moles of H2O can you make?
.6 mol of H2O
Are ionic or covalent compounds electrolytes
ionic
How does kinetic energy change as the temperature of a substance increases
the temperature increases
Draw a picture of nuclear fission
1 nucleus split into 2 smaller nucleus
A chemical company indicates that their acid is 1.5M acid. In order to make the acid, they start with 17 mL of 6 M acid, and dilute it to 75 mL. Is the chemical company correct about their indicated concentration of acid?
No, their molarity is 1.36