5.
molarity = 0.5M
volume of solution = 200ml = 0.2L
no of moles of CaCl2 = molarity *volume in L
= 0.5*0.2 = 0.1moles
mass of CaCl2 = no of moles* gram molar mass
= 0.1*111
= 11.1g >>>answer
6.2H2S(g) + 3O2(g) -----------> 2SO2(g) + 2H2O(l)
B) 3
7.
N2 + 3H2 -----------> 2NH3
1 mole of N2 react with 3 moles of H2
2 moles of N2 react with = 3*2/1 = 6 moles of H2 is required
H2 is limiting reactant
3 moles of H2 react with exess of N2 to gives 2 moles of NH3
perccent yield = actual yield *100/theoretical yield
= 1.5*100/2 = 75%
8. no of moles of H2O = W/G.M.Wt
= 2000/18 = 111.11moles
2H2O(l) ------------> 2H2(g) + O2
2 moles of H2O electrolysis to gives 1 mole of O2
111.11moles of H2O electrolysis to gives = 1*111.11/2 = 55.555moles of O2
n = 55.555moles
P = 1atm
T = 25+273 = 298K
PV = nRT
V = nRT/P
= 55.555*0.0821*298/1 = 1359L of O2 >>>>answer
5, 7, and 8 please! 5. What mass of calcium chloride must be dissolved in water...
please do each problem except for #6 and explain how you got them. dumb it down please. 4. A typical silicon chip such as these in electronie calculators weighs 21 10 in such a chip? How many silicone What mass of calcium chloride must be dissolved in water to prepare 200 ml of a solution with concentration of 0.50 M 6. What is the coefficient for exygen when this equation is balanced! H.SC) _0x) SOC) - HOM (A) 2 (B)...
When 23.6 g of calcium chloride, CaCl2, was dissolved in water in a constant-pressure calorimeter, the temperature rose from 25.0 C to 38.7 C. If the heat capacity of the solution and the calorimeter is 1258 J/C, what is the enthalpy change when 0.710 mol of calcium chloride dissolves in water? The solution process is CaCl2(s) --> Ca2+(aq) + 2Cl–(aq)
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Question 5 (4 points) According to the equation: 2H2 + O2 + 2H20 8.0 mole of water would be produced from _?_ moles of oxygen gas. 4.0 0.50 2.0 1.0 8.0 Question 6 (4 points) A 0.19 mole sample of ammonia (NH3) would have a mass of: 1.9 g 3.2 g 0.19 g 0 7.79 1.1 x 1023 g
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3. When 15.7 g of calcium chloride (CaClz) was dissolved in 200.0 ml of water in a coffee-cup calorimeter, the temperature of the solution increased from 25.00 °C to 34.13 °C, the dissolution of CaCl in water in units of kJ per mole of CaCl,. Calculate the entha lpy change(AH otn)for You can assume that the calorimeter loses only a negligible quantity of heat, that the total solution is 200.0 mL (adding the solid CaCl, did not change the volume...
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can u answer 8 and 9 5 L What mass of ammonia is in the container? R-0.0821 L atm/mol K A) 17.0 g B) 59.8 g C) 0.180 g D) 8.04 g E) 0.07878 8) 8) Sodium polypbesplate is used in detergents to make the effective in band water. Calculate the oxidation number of phosphorus in NagP3010 N214- 5 -20 A) +3 B) +5 C) +15 D) +10 E) None of the above is the correct oxidation number. 0,olou, 9)...