nile
2013-10-24, 08:15 PM
Q1: the length of a cylindrical vessel is 12.7cm. what is the diameter of the vessel if 105.5 g of mercury can fill it completely? (Density of mercury is 13.6 gfile:///C:\Users\sehamh\AppData\Local\Temp\msohtmlclip1\01 \clip_image002.pngmL)
Q2: A graduated cylinder is filled with 242.0 mL of water. A piece of silver (AG) ****l weighing 194.3 g was dipped in the water . the volume of water now reads 260.5 mL . from these data calculate the density of silver.
Q3: A sheet of aluminum (Al) foil has a total area of 1.000 ft 2 and a mass of 3.636 g. what is the thickness of the foil in millimeters? (Density of Al is 2.699 gfile:///C:\Users\sehamh\AppData\Local\Temp\msohtmlclip1\01 \clip_image002.pngcm3 )
Q4: Convert:
a- 300 k to oc
b- 500 oF to oc
c- 273.15 k to oF
Q5: fill the planks in the following table
symbol
5426F+2
protons
5
79
86
neutrons
6
16
117
136
electrons
5
18
79
Net charge
-3
0
Q6: fill the planks in the following table
cation
anion
formula
Name
Magnesium
bicarbonate
SrCl2
Fe3+
NO2-
Manganese(ll)
Chlorate
SnBr4
CO2+
PO3-4
Hg2+2
l-
Cu2CO3
Lithium nitride
Al3+
S2-
Q7: urea ](NH2)2CO[ is used for fertilizer and many other applications. Calculate the number of N, C, o, and H atoms in 1.68× 104 g of urea?
Q8: Allicin is the compound responsible for the characteristic smell of garlic . An analysis of the compound gives the following percent compositions by mass : C:44.4 , H:6.21 , S:39.5 and O:9.86
Percent . Calculate the empirical formula and the molecular formula if the molar mass of Allicin is 162 g ?
Q9: silicon tetrachloride (SICl4) can be prepared by heating Si in gaseous cholrine according to the equation:
file:///C:\Users\sehamh\AppData\Local\Temp\msohtmlclip1\01 \clip_image003.pngfile:///C:\Users\sehamh\AppData\Local\Temp\msohtmlclip1\01 \clip_image004.pngSi(s) + Cl2(g) SiCl4(I)
In one reaction , 0.507 mole of SiCl4 is produced . Using a balanced equation calculate how many moles of molecular were used in the reaction?
Q10: for the reation
file:///C:\Users\sehamh\AppData\Local\Temp\msohtmlclip1\01 \clip_image005.png C4H10+O2 CO2 + H2O
a- Balance the above eqation
b- Using the balance cholrine , calculate the number of CO2 formed if 5.0 moles of C4H10
are reacted with excess oxygen
Q11- write the expressions of the equilibrium kc of the following reactions :
file:///C:\Users\sehamh\AppData\Local\Temp\msohtmlclip1\01 \clip_image006.pngfile:///C:\Users\sehamh\AppData\Local\Temp\msohtmlclip1\01 \clip_image004.png(a)- 2NaHCO3 (s) Na2CO3 (s) + CO2 + H2O (g)
file:///C:\Users\sehamh\AppData\Local\Temp\msohtmlclip1\01 \clip_image007.png(b)- 2CaSO4 ( s) 2CaO2 (s) + O2 (g)
Q12- for the reaction
H2 (g) + CO2 (g) file:///C:%5CUsers%5Csehamh%5CAppData%5CLocal%5CTemp%5Cmso htmlclip1%5C01%5Cclip_image008.png H2O (g) + CO (g)
The equilibrium constant kc was found to be 0.534 at 700 oC. calculate the number of moles of H2 that are present at equilibrium if a mixture of 0.300 mole of CO and 0.300 mole of H2O is heated to 700 oC in a 10.0 L container.
Q2: A graduated cylinder is filled with 242.0 mL of water. A piece of silver (AG) ****l weighing 194.3 g was dipped in the water . the volume of water now reads 260.5 mL . from these data calculate the density of silver.
Q3: A sheet of aluminum (Al) foil has a total area of 1.000 ft 2 and a mass of 3.636 g. what is the thickness of the foil in millimeters? (Density of Al is 2.699 gfile:///C:\Users\sehamh\AppData\Local\Temp\msohtmlclip1\01 \clip_image002.pngcm3 )
Q4: Convert:
a- 300 k to oc
b- 500 oF to oc
c- 273.15 k to oF
Q5: fill the planks in the following table
symbol
5426F+2
protons
5
79
86
neutrons
6
16
117
136
electrons
5
18
79
Net charge
-3
0
Q6: fill the planks in the following table
cation
anion
formula
Name
Magnesium
bicarbonate
SrCl2
Fe3+
NO2-
Manganese(ll)
Chlorate
SnBr4
CO2+
PO3-4
Hg2+2
l-
Cu2CO3
Lithium nitride
Al3+
S2-
Q7: urea ](NH2)2CO[ is used for fertilizer and many other applications. Calculate the number of N, C, o, and H atoms in 1.68× 104 g of urea?
Q8: Allicin is the compound responsible for the characteristic smell of garlic . An analysis of the compound gives the following percent compositions by mass : C:44.4 , H:6.21 , S:39.5 and O:9.86
Percent . Calculate the empirical formula and the molecular formula if the molar mass of Allicin is 162 g ?
Q9: silicon tetrachloride (SICl4) can be prepared by heating Si in gaseous cholrine according to the equation:
file:///C:\Users\sehamh\AppData\Local\Temp\msohtmlclip1\01 \clip_image003.pngfile:///C:\Users\sehamh\AppData\Local\Temp\msohtmlclip1\01 \clip_image004.pngSi(s) + Cl2(g) SiCl4(I)
In one reaction , 0.507 mole of SiCl4 is produced . Using a balanced equation calculate how many moles of molecular were used in the reaction?
Q10: for the reation
file:///C:\Users\sehamh\AppData\Local\Temp\msohtmlclip1\01 \clip_image005.png C4H10+O2 CO2 + H2O
a- Balance the above eqation
b- Using the balance cholrine , calculate the number of CO2 formed if 5.0 moles of C4H10
are reacted with excess oxygen
Q11- write the expressions of the equilibrium kc of the following reactions :
file:///C:\Users\sehamh\AppData\Local\Temp\msohtmlclip1\01 \clip_image006.pngfile:///C:\Users\sehamh\AppData\Local\Temp\msohtmlclip1\01 \clip_image004.png(a)- 2NaHCO3 (s) Na2CO3 (s) + CO2 + H2O (g)
file:///C:\Users\sehamh\AppData\Local\Temp\msohtmlclip1\01 \clip_image007.png(b)- 2CaSO4 ( s) 2CaO2 (s) + O2 (g)
Q12- for the reaction
H2 (g) + CO2 (g) file:///C:%5CUsers%5Csehamh%5CAppData%5CLocal%5CTemp%5Cmso htmlclip1%5C01%5Cclip_image008.png H2O (g) + CO (g)
The equilibrium constant kc was found to be 0.534 at 700 oC. calculate the number of moles of H2 that are present at equilibrium if a mixture of 0.300 mole of CO and 0.300 mole of H2O is heated to 700 oC in a 10.0 L container.