x2babydollx7
New member
can anyone help me with these problems and thank you if you can:
7.What mass in grams of solute is needed to prepare [4 points, 2 points for each part]
(a)4.0 L of 0.400 M NaOH
(1) 16 g
(2) 32 g
(3) 48 g
(4) 64 g
(b)65.0 mL of 3.0 M C6H12O6
(1) 19.0 g
(2) 35.1 g
(3) 43.4 g
(4) 52.7 g
8.Glucose C6H12O6 is metabolized in living systems according to the reaction
C6H12O6(s) + 6 O2(g) -> 6 CO2(g) + 6 H2O(l) [3 points]
How many molecules of water can be produced when 22.4 L O2 reacts at STP?
Number of molecules formed:3.01 x 1023
6.02 x 1023
1.81 x 1024
3.61 x 1024
9.How many grams of water will form from the decomposition of 51 g of hydrogen peroxide? The balanced equation for the decomposition is: [4 points]
2 H2O2(aq) -> 2 H2O(l) + O2(g)
The atomic weight of hydrogen is 1.0 and of oxygen is 16.0.
9 grams18 grams
27 grams36 grams
10.Balance the following equations: [8 points]
Fe+ O2? Fe2O3
CaCO3(s)+ HCl(aq)? CaCl2(aq)+ H2O(l)+ CO2(g)
C7H16+ O2? CO2+ H2O
Mg3P2+ H2O? PH3+ Mg(OH)2
11.Are the following formulas correct? If not, write the correct formula. [6 points]
YesNoCorrect a
Mg2O___ ___ ________
CaNO3 ______________
(NH4)2NO3______________
Al2(SO4)3______________
12.What is the percentage of carbon in the amino acid glycine: C2H5NO2? [4 points]
13.In tests for intoxication, blood alcohol levels are expressed as percent by volume. A blood alcohol level of 0.080% means 0.080 mL ethanol per 100 mL of blood and is considered proof of intoxication. If the average persons blood volume is 5.0 L, what volume of alcohol in the blood gives a blood alcohol level of 0.165% by volume? [3 points]
7.What mass in grams of solute is needed to prepare [4 points, 2 points for each part]
(a)4.0 L of 0.400 M NaOH
(1) 16 g
(2) 32 g
(3) 48 g
(4) 64 g
(b)65.0 mL of 3.0 M C6H12O6
(1) 19.0 g
(2) 35.1 g
(3) 43.4 g
(4) 52.7 g
8.Glucose C6H12O6 is metabolized in living systems according to the reaction
C6H12O6(s) + 6 O2(g) -> 6 CO2(g) + 6 H2O(l) [3 points]
How many molecules of water can be produced when 22.4 L O2 reacts at STP?
Number of molecules formed:3.01 x 1023
6.02 x 1023
1.81 x 1024
3.61 x 1024
9.How many grams of water will form from the decomposition of 51 g of hydrogen peroxide? The balanced equation for the decomposition is: [4 points]
2 H2O2(aq) -> 2 H2O(l) + O2(g)
The atomic weight of hydrogen is 1.0 and of oxygen is 16.0.
9 grams18 grams
27 grams36 grams
10.Balance the following equations: [8 points]
Fe+ O2? Fe2O3
CaCO3(s)+ HCl(aq)? CaCl2(aq)+ H2O(l)+ CO2(g)
C7H16+ O2? CO2+ H2O
Mg3P2+ H2O? PH3+ Mg(OH)2
11.Are the following formulas correct? If not, write the correct formula. [6 points]
YesNoCorrect a
Mg2O___ ___ ________
CaNO3 ______________
(NH4)2NO3______________
Al2(SO4)3______________
12.What is the percentage of carbon in the amino acid glycine: C2H5NO2? [4 points]
13.In tests for intoxication, blood alcohol levels are expressed as percent by volume. A blood alcohol level of 0.080% means 0.080 mL ethanol per 100 mL of blood and is considered proof of intoxication. If the average persons blood volume is 5.0 L, what volume of alcohol in the blood gives a blood alcohol level of 0.165% by volume? [3 points]