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A cook wants to heat 1.73 kg of water from 30.0C to 100.0C .If he uses the combustion of natural gas (which is exothermic) to heat the water, how much natural gas will he need to burn? Natural gas produces 49.3 of heat per gram. (For the sake of simplicity, assume that the transfer of heat is 100 efficient.)
Calculate the mass of AgNO3(s) that must be added to 0.500 L of a solution of 0.154 M NaClsolution to precipitate ‘all' of the chloride ion. The ‘all' means that we want to add the same number of moles of silver ion.
replacement compounds for the Freons have gone into production: HFC-134a (chemical formula: CH 2 FCF 3 ) and HCFC-124 (formula:CHClFCF 3 ) In 1991. Determine the molar masses of these two compounds
What proportions of ethanol and water should be mixed in order to produce 100 cm3 of a mixture containing 50 percent by mass of ethanol.
Find out What mass of the NaHCO3 reacts with the vitamin C When the tablet dissolves in H2O, it "fizzes" because the reason for this is the CHO3 reacts with the citric acid(C6H8O7 a weak organic acid) and the vitamin C?
How much energy in kJ must be absorbed to heat up a volume of ocean water 2 m high by 20 km wide by 30 km deep by 3°C.
Metallic magnesium reacts with steam to produce magnesium hydroxide and hydrogen gas. a. If 16.2 g Mg are heated with 12.0 g H2O, what is the limiting reactant?
An experiment requires 46.0 of ethylene glycol, a liquid whose density is 1.114 . Rather than weigh the sample on a balance, a chemist chooses to dispense the liquid using a graduated cylinder.
What volume of 0.140 M Hydrochloric acid is required to neutralize 2.68g of Magnesium hydroxide.
Mixture also contains He (helium gas). determine the partial pressure of the He gas?
A reaction vessel contains these compounds at equilibrium. What will happen if the volume of the container is reduced by 50% at constant temperature.
Octane has a density of 0.692 g/mL at 20 degrees celsius How many grams of oxygen are required to burn 1.10 gal of octance.
Explain why the boiling point of an aqueous solution that is 1.0 m in glucose (C6H12O6) is 100.51oC whereas The boiling point of an aqueous solution that is 1.0 m in NaCl is 101.02 oC .
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