Stoichiometry
Lithium reacts with hydrochloric acid to produce?
Lithium chloride and hydrogen gas
456J = ____ calories
108.99 cal
654oC is equal to ____K
927K
Which of the following things does not make a solution dissolve faster?
a)heating it
b)stirring it
c)crushing the solute into fine particles
d) removing solvent
d. removing solvent
H2SO3 is known as
Sulfurous Acid
How many moles of Al₂O₃ are produced by 5.4 moles of FeO according to the following reaction?
2Al + 3FeO --> 3Fe + Al₂O₃
1.8 moles of Al₂O₃
_____ calories are needed to raise the temperature of 75.4 g of aluminum ( c = 0.21 cal / g℃ ) by 13.4℃
212.18 cal
As the temperature of a sample of matter is increased, the average kinetic energy of the particles in the sample _____.
increases
The molarity of a solution that contains 6 moles of solute dissolved in 2 L of solution is _____ M
3M
If [H+]= 1.0*10-12, pH= ???
12
How many grams of O2 are required to produced 134g of CuO?
2Cu + O2 --> 2CuO
26.95g O2
147g of a substance requires 1432 calories to raise the temperature of the substance by 17.4 degrees. It's specific heat is ____?
0.559 cal/goC
278 mmHg is equal to ____kPa?
37.05 kPa
_____ g of NaCl are needed to make 300.0 mL of a 0.234 M solution.
4.10g NaCl
If [ OH- ] = 0.000189 M, then the pH = _____
10.3
How many liters of NH3 at STP are needed to produce 57.8g of N2 according to the following reaction?
2NH3 --> N2 +3H2
92.41L NH3
2NO2 + O2 --> 2NO3 ΔH= 145 kJ
6NO3 --> 6NO2 + 3O2 ΔH= ???
-435 kJ
A gas that occupies 3.4L at 54kPa will occupy ____L at 54.8mmHg.
25.15L
_____ g of NaCl are dissolved in 4.20 kg of water to produce a 3.35 m solution.
822.25g NaCl
If [ H+] = 0.1 M, then [ OH- ] = _____ M
1 x 10^-13
60.0g of CuCO3 reacts with 31.4g of Mn according to the following reaction. How many grams of Cu do you produce?
2CuCO3 + Mn → Mn(CO3)2 + 2Cu
Limiting Reactant: CuCO3
30.89g
If 3.1 moles of NO3 is produced, what is the change in enthalpy?
2NO2 + O2 --> 2NO3 ΔH= 145 kJ
224.75 kJ
How many moles of NH₃ are produced by 610L of H₂ with a pressure of 0.81atm at 25℃ according to the following reaction?
2NH3 --> N2 +3H2
13.47 moles NH3
64.5 g of AlF₃ dissolved in 0.93 kg of water will lower the freezing point to _____℃
-6.15oC
45.1mL of 0.156M Al(OH)₃ was use to neutralize 19.4mL of H₂SO4. What is the concentration of the acid?
2Al(OH)₃ + 3H₂SO4 → Al₂(SO4)₃ + 6H₂O
0.544M