skool gurl
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1. Which equation represents the reaction of ammonia with water?
a) NH3(aq) + H2O(l) <---> NH4^+(aq) + OH^ -(aq)
b) NH3(aq) + H2O(l) <---> NH2OH(s) + H2(g)
c)2NH3(aq) + 4H2O(l) <---> 2NO2(g) + 6H2(g)
d) NH3(aq) + H2O(l) <---> NH2^ -(aq) + H3O^+(aq)
2. How many moles of solute is contained in 250 mL of 0.0775 M solution???
a) 3.10 mol
b) 0.194 mol
c) 0.323 mol
d) 0.0031 mol
3. A balanced equation representing the ionization of barium sulfate in water is?
4. Ammonia is produces by the reaction of hydrogen and nitrogen: N2(g) + 3H2(g) --> 2NH3(g) How many moles of H2 are needed to react with 1.0 mole of N2?
5. How many atoms are in 5.9mol of H(g)?
6. If the pressure of 245mL of hydrogen iodide gas at 100 degree C decrease from 985 torr to 215 torr, what is the final volume? Assume temperature remains constant?
7. Calculate the heat needed at 0 degree C to make the following change of state. Indicate whether heat was absorbed or released: Calories to freeze 95g of water ( heat of fusion = 80 cal/g; heat of vaporization = 540 cal/g?
a) 1.6x10^4 cal released
b) 1.6x10^4 cal absorbed
c) 7.6x10^3 cal released
d) 7.6x10^3 cal absorbed
e) 2.4 cal released
8. Of the common nuclear radiation, which one has a charge of +1 and a negligible mass?
9. Write the equation for the positron emission process of the ^38 20Ca?
10. Citric acid is found in citrus fruits such as lemons, limes, oranges. The formula for citric acid is C2H4OH(COOH)3. What is the total number of atoms in citric acid?
11. How much heat is required to heat 755g of iron from 23 degree C to 175 degree C if the specific heat of iron is 0.11cal/(g.deg) <--this is (g dot deg)????
12. To make a buffered solution containing nitrous acid, HNO2; It also must contain?
a) NaCl
b) NO2^-1
c) CO3^-2
d) C2H3O2^-1
a) NH3(aq) + H2O(l) <---> NH4^+(aq) + OH^ -(aq)
b) NH3(aq) + H2O(l) <---> NH2OH(s) + H2(g)
c)2NH3(aq) + 4H2O(l) <---> 2NO2(g) + 6H2(g)
d) NH3(aq) + H2O(l) <---> NH2^ -(aq) + H3O^+(aq)
2. How many moles of solute is contained in 250 mL of 0.0775 M solution???
a) 3.10 mol
b) 0.194 mol
c) 0.323 mol
d) 0.0031 mol
3. A balanced equation representing the ionization of barium sulfate in water is?
4. Ammonia is produces by the reaction of hydrogen and nitrogen: N2(g) + 3H2(g) --> 2NH3(g) How many moles of H2 are needed to react with 1.0 mole of N2?
5. How many atoms are in 5.9mol of H(g)?
6. If the pressure of 245mL of hydrogen iodide gas at 100 degree C decrease from 985 torr to 215 torr, what is the final volume? Assume temperature remains constant?
7. Calculate the heat needed at 0 degree C to make the following change of state. Indicate whether heat was absorbed or released: Calories to freeze 95g of water ( heat of fusion = 80 cal/g; heat of vaporization = 540 cal/g?
a) 1.6x10^4 cal released
b) 1.6x10^4 cal absorbed
c) 7.6x10^3 cal released
d) 7.6x10^3 cal absorbed
e) 2.4 cal released
8. Of the common nuclear radiation, which one has a charge of +1 and a negligible mass?
9. Write the equation for the positron emission process of the ^38 20Ca?
10. Citric acid is found in citrus fruits such as lemons, limes, oranges. The formula for citric acid is C2H4OH(COOH)3. What is the total number of atoms in citric acid?
11. How much heat is required to heat 755g of iron from 23 degree C to 175 degree C if the specific heat of iron is 0.11cal/(g.deg) <--this is (g dot deg)????
12. To make a buffered solution containing nitrous acid, HNO2; It also must contain?
a) NaCl
b) NO2^-1
c) CO3^-2
d) C2H3O2^-1