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Write out balance equation and skeleton equation for each? Gaseous hydrogen and gaseous oxygen.
It is known that two molecules of hydrogen gas, H2, react with one molecule of oxygen gas, O2, to form two molecules of water, H2O. This reaction may be represented...
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A gaseous mixture consists of 1.08 mol of helium, 0.36 mol of neon, and 1.58 mol of argon. What is the mole fraction of helium in the mixture?
Mole fraction of helium = moles of helium/ total moles= 1.08/(1.08 + 0.36 + 1.58) = 0.36
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You have one mol sample of water at -30 °C and you heat it until you have gaseous water at 140°C. Calculate q for the entire process in kJ/mol .
q for the entire process =56. 431kJ/mol
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Estimate the amount of heat released (in kj/mol) when 10g of CH4 gas reacts with an excess of O2 gas to form gaseous CO2 and liquid water. The molar mass of CH4 is 16.042
CH4(g) + 2O2(g) = CO2(g) + 2H2O (liq)∆H = 2∆H(H2O) + ∆H(CO2) - ∆H(CH4) ∆H = 2 * (-285,8) +(-393,5) + 74,6 = -890,5 kj/mol Q = n * ∆H;...
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<ol><li>10 mol of Zn react with 10 mol of HCl. Calculate the number of moles of H2 produced.</li></ol> (a) 5 mol (b) 10 mol (c) 20 mol (d) 2.5 mo
ANSWER SHOUD BE "a".EXPLANATION ......Zn reacts with HCl and form ZnCl2 and H2 .Balance Reaction is Zn + 2HCl ----- ZnCl2 + H2 .When 10 mol of Zn react with...
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Differentiate between bulk sample, primary sample, secondary sample, subsample, laboratory sample, and test sample.
A bulk sample is the physical sample of a large volume or tonnage of mineral material taken from a known resource area for investigative purposes.Primary sampling unit refers to Sampling...
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Define the following terms:
i) Isolated system
ii) Isothermal process
iii) Adiabatic process
iv) Isobaric process
v) Isochoric process
Answer: i) Isolated system In physical science, an isolated system is either of the following: 1. a physical system so far removed from other systems that it does not interact with them....
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What amount of heat is required to increase the temperature of 15.0 g of mercury from 22.3°C to 36.1°C? The specific heat of mercury is 0.140 J/g°C.
Q = C x m x deltaTC(mercury) = 0.140 J/g KQ = 0.14 x 15 x (36.1-22.3) = 28.98 J
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From an initial mix of: 2 mol Cl2, 1 mol Br2, 0.5 mol I2, 0.5 mol Cl−, 1 mol Br−, 2 mol I−; the total quantity of I2 present after all possible reactions occur is
0.5 mol I2 and 0.5 mol Cl- will not react with anything; 2 mol I- will react with one mol of Cl2 producing one mol of I2: 2I- + Cl2...
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Calculate the heat required to vaporize 7.87 g of benzene at its normal boiling point.
Heat of vaporization (benzene) = 30.7 kJ/mol
Heat = kJ
Solution: Molecular weight of benzene: 78.11 g/mol Amount of benzene: 7.87 / 78.11 = 0.1 mol Energy needed (heat): 0.1 ∙ 30.7 = 3.07 kJ Answer: Heat = 3.07 kJ
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