Chemical Foundations
Unit conversions: Convert 1325 mL to L.
1.325 L
What is the formula to find molarity?
molarity= mol solute / L solution
True or False: An acid is a proton acceptor and a base is a proton donor.
False. Acids are proton donors, bases are proton acceptors.
True or False: Energy is the capacity to do work or produce heat.
True
Name the 5 reaction methods:
Synthesis, Decomposition, Single Displacement, Double Displacement, Combustion
Give the number of significant figures: A chemist records a mass of 0.050080 g in an analysis.
5 sig figs
Give the name for the compound: Na2SO4
Sodium Sulfate
Name 4 Strong Bases
Any of the following:
LiOH, NaOH, KOH, Ca(OH)2, Sr(OH)2, Ba(OH)2
Is the reaction endothermic or exothermic?
N2(g) + O2(g) + energy (heat) --> 2NO(g)
Endothermic.
In the equation; C5H12 + 8O2 = 5CO2 + 6H2O What is the number of moles of CO2 can be made if you start out with 16 moles of oxygen gas?
10 Moles of CO2
Calculate and give the result with the correct number of sig figs: 21 - 13.8
7
What is the difference between a solute and solvent?
solute- the substance (has less of)
solvent- the liquid the solute dissolves in (has majority)
Name 5 strong acids
Any of the following:
HCl, HBr, H2SO4, HNO3, HI, HClO4, HClO3
4.186 J/g°C
When the following is balanced: __Al + __Fe3O4 ---> ___Al2O3 + ___Fe The value in front of Al is:
8
One mole is equal to ___ atoms
6.022x10^23 atoms
State the formula for Iodine heptafluoride
IF7
A strong acid is one that is completely __________
Dissociates
A system wherein the exchange of energy and matter takes place with the environment is called a(n):
Open system
In the equation; ___SnO2 + ___H2 --> ___ Sn + ___H2O You have 36 g of SnO2 and 36 g of H2. Find the limiting reactant.
SnO2
Temp: 0 Celcius, 273.15K
Pressure: 1 atm=760 torr=101.3kPa
State the chemical formula for Iron III carbonate
Fe2(CO3)3
Acids get stronger as....
Conjugate bases get weaker
If a reaction is exothermic, what does ΔH have to be?
ΔH<0 (negative).
What rules do you use to know if a double replacent reaction occurs AND how does the rules work?
Solubilty rules, in order to have a reaction one of the products must be a solid