Exam 1
How many sig figs are in 4.9210
5
A reaction between an acid and a base create what?
H20 and a salt
Sulfuric Acid and Sodium Hydroxide react to form a salt and water. How many grams of Sulfuric Acid are needed to produce 3 moles of Na2SO4?
240g NaOH
A) .1M KBr
B) .050M (NH4)2CO3
C).045M Al2(SO4)3
What is the Molarity of a compound with 13.3 moles of Oxygen in a 4L beaker
3.325M
How many molecules are there in 2.1 mol CO2?
1.26 x10 to the 24th
What is a strong electrolyte?
A strong acid/base
what is the concentration of NO3- ions in a .191 M Ba(NO3)2 solution?
.383 M
In the following reaction:
2HCl(aq) +Mg(s)--> H2(g) +MgCl2(aq)
what is being reduced, and what is the oxidizing agent?
HCl is being reduced, and is the oxidizing agent
How many grams of Cl are in a 4M solution of 36mL
5104.8 g Cl
Fe2O3
What is the net ionic equation of
MgCL2(aq) + AgNO3(aq)--> Mg(NO3)2(aq) +AgCl(s)
Ag+(aq) +Cl-(aq) --> AgCl2 (s)
Determine the percent yeild when 28.65 g of Fe (55.85g/mol) is iolated in the lab from reacting 50g of Fe2O3 with excess Al according to the following reaction:
Fe2O3(s) + 2Al (s)--> Al2O3(s) + 2Fe (s)
81.93%
Al reacts with an anion to form AL2X3. What would be the most likely formula for the compound formed between calcium and the anion X
CaX
what is the molarity of a 10.9g KCl dissolved in 150.0 mL of water? (molar mass KCl= 74.55 g/mol)
0.975M
Calculate the atomic mass of element "X," if it has 2 naturally occurring isotopes with the following masses and natural abundances.
X-107106.90509 amu51.84%
X-109108.90476 amu48.46%
108.19 amu
what is the net ionic equation for the following reaction?
H2SO4(aq)+2 NaOH(aq)-->2 H20(l)+NaSO4(aq)
H+ (aq) + OH-(aq)-->H2O(l)
How many grams of NaOS are needed to react with 25mL of .315M AgNO3? (Na2S= 78.05g/mol) (VxM=n)
Na2S(aq) +2 AgNO3(aq) -->2 NaNO3(aq) +Ag2S(s)
.037g Na2S
How many mililiters are needed to dilute a 9 M H2SO4 solution to make .25L of a 3.5 M H2SO4 solution?
97mL
How many mililiters of a .75M solution can be made with 75g of lead (ii) oxide?
.448L
A compound is found to consist of 42.02% Carbon, 6.67% Hydrogen and 53.31% oxygen. Determine the compound's empirical formula.
CH2O
What is the precipitate of the reactants Pb(NO3)2 (aq) +Na2CO3 (aq)
Pb(CO3)2 (s)
3 AgNO3 + AlCl3 --> Al(NO3)3 +3 AgCl
what mass in grams of AgCl is produced when 4.22g of AgNO3 react with 7.73g AlCl3?
AgNO3= 169.88g/mol
Al(NO3)3= 213.01 g/mol
AlCl3 =133.33 g/mol
AgCl=143.32 g/mol
3.56g AlCl
a motorcycle emits 9.5g of carbon monoxide per kilometers driven. How many pounds of carbon monoxide does the motorcycle generate over 5 years if the motorcycle drives 15,000 miles per year? (1mi= 1.609 km) (1lb=454g)
25,000 lb CO
What is the concentration of a solution with a volume of 9mL that contains 2 grams of iron (iii) hydroxide?
2.08 M