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Chem Test 2 (chapter 4)

Terms in this set (25)

Define a greenhouse gas
Greenhouse gases allow visible light to pass through and warm the earth surface, and prevent heat energy from radiating back out into space
How many moles of oxygen are formed when 58.6g of KNO3 decomposes according to the following reaction? The molar mass of KNO3 is 101.11 g/mol

4 KNO3 -> 2 K2O + 2 N2 + 5 O2
0.724 mol O2
Two samples of calcium fluoride are decomposed into their constituent elements. The first sample produced 0.154g of calcium and 0.146 g of fluorine. If the second sample produced 294 mg of fluorine, how many grams of calcium are formed?
0.309 g
A 14.01 g sample of N2 reacts with 3.02 g of H2 to form ammonia (NH3). If ammonia is the only product, what mass of ammonia is formed?
17.01 g
Consider the following balanced reaction. What mass in grams of CO2 can be formed from 288 mg of O2? Assume that there is excess C3H7SH present.

C3H7SH + 6 O2 -> 3 CO2 + SO2 + 4 H2O
0.198 g CO2
how many molecules of H2 S are required to form 79.0 g of sulfur according to the following reaction? Assume excess SO2

2 H2S + SO2 -> 3S + 2 H2O
9.89 x 10^23 molecules H2S
Determine the limiting reactant and mass in grams of nitrogen that can be formed from 50.0 g N2O4 and 45.0 g in N2H4. Some possibilities are useful molar masses are as follows N2O4 92.02 g/mole, N2H4 equals 32.05 g/mole.

N2O4 + 2 N2H4 -> 3 N2 + 4 H2O
LR = N2O4, 45.7g N2 formed
According to the following reaction, what amount of Al2S3 remains win 20.00 g of Al2S3 and 2.00 g of H2O are reacted? A few of the molar masses are as follows Al2S3 = 150.17 g/mol, H2O = 18.02 g/mol
17.22 g
Determine the molarity of a solution formed by dissolving 3.00 moles of NaCl in enough water to yield 4.00 L of solution
.750 M
Determine the molarity of a solution formed by dissolving 97.7 g LiBr in enough water to yield 750.0 mL of solution.
1.50 M
How many molecules of sucrose (C12H22O11, molar mass 342.30) are contained in 14.3 mL of 0.140 M sucrose solution
1.21 x 10^21 molecules C12H22O11
According to the following reaction, what volume of 0.244 M KCl solution is required to react exactly with 50.0 mL of 0.210M Pb(NO3)2 solution?

2 KCl + Pb(NO3)2 -> PbCl2 + 2 KNO3
86.1 mL
Determine the number of grams of H2 formed when 250.0 mL of 0.743 M HCl solution reacts with 3.41×10^23 atoms of Fe according to the following reaction

2HCl + Fe -> H2 + FeCl2
0.187 g
What mass (in g) of AgCl is formed from the reaction of 75.0 mL of a .078 M AgC2H3O2 solution with 55.0 mL of 0.109 M MgCl2 solution?

2 AgC2H3O2 + MgCl2 -> 2 AgCl + Mg(C2H3O2)2
0.838 g
Choose the statement below that is true
A weak acid solution consists of mostly nonionized acid molecules
Give the net ionic equation for the reaction (if any) that occurs when aqueous solutions of lithium sulfide and copper (||) nitrate are mixed
2 Li+(aq) + S2-(aq) + Cu2+(aq) + 2 NO3-(aq) -> CuS(s) + 2Li+(aq) + 2 NO3-(aq)
Give the net ionic equation for the reaction (if any) that occurs when aqueous solutions of K2S and Fe(NO3)2 are mixed.
Fe2+(aq) + S2-(aq) → FeS(s)
Give the spectator ions for the reaction that occurs when aqueous solutions of K2S and Fe(NO3)2 are mixed
K+ and NO3-
Give me the complete ionic equation for the reaction (if any) that occurs when aqueous solutions of H2SO4 and KOH are mixed
H+(aq) + OH-(aq) + 2 K+ (aq) -> H+(aq) +OH-(aq) K2SO4(s)
Give the net ionic equation for the reaction (if any) of that occurs when aqueous solutions of AL(C2H3O2)3 and LiNO3 are mixed
No reaction occurs
Give the net ionic equation for the reaction (if any) that occurs when aqueous solutions of Na2CO3 and HCl are mixed
2H+(aq) + CO3^2-(aq) + H2O(l) + CO2 (g)
Give the complete ionic equation for the reaction (if any) that occurs when aqueous solutions of Na2CO three and HCl are mixed
2Na+(aq) + CO3^2-(aq) + 2 H+(aq) + Cl-(aq) -> H2O(l) + CO2(g) + 2 Na+ (aq) + 2 Cl-(aq)
Give the complete ionic equation for the reaction (if any) that occurs when aqueous solutions of MgSO3 and HI are mixed
2 H+(aq) + SO32-(aq) + Mg2+(aq) + 2I-(aq) → H2O(l) + SO2(g) + Mg2+(aq) + 2I-(aq)
Give the spectator ions for the reaction that occurs when aqueous solutions of MgSO3 and HI are mixed
Mg2+ and I-
Define an Arrhenius base.
produces OH- ions in aqueous solution
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