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1. Consider a hypothetical reaction in which A and B are reactants and C and D are products. if 15grams of A completely reacts with 12grams of B to produce 14grams of C, how many grams of D will be produced.
2. A 4.2 gram sample of sodium hydrogen carbonate is added to a solution of acetic acid weighing 10.2grams. the two substances react, releasing carbon dioxide gas to atmosphere. after the reaction, the content of the reaction vessel weighs 12.2 grams. what is the mass of carbon dioxide given off during the reaction.
A mixture of 40 Ml of methyl butyrate (MW-102.1 g/mol,d-0.89 g/mL) and 10 mL butyric acid (MW=88.1 g/mol, d=0.96 g/ML) is distilled.
An industrial freezer is maintained at -26 oC with a vapor compression refrigeration unit using R-134a (HFC-134a) as the working fluid. A throttle is used in the refrigeration cycle and the compressor is 80% efficient.
explain why granulated activated charcoal is considered to be the best available treatment technology for dioxins in water.
calculate the ph at the equivalence point for the titration of 0.10 M NH3 with 0.10 M Hcl. the Kb for NH3 is 1.8 10^-5.
How many liters of carbon dioxide are produced when 5.00x10^23 molecules of oxygen react? How many grams of water are produced if 25.0 L of oxygen gas react?
In an airplane, a gas sample occurs at a volume of 1.5 L at 760.0 torr. Suppose, while flying, the airplane loses pressure and the volume of the gas increases to 11.40 L.
What is the coefficient of the water? K2O + H2O What is the mass of 2.10 x 1021 atoms of copper, Cu? What is the molar mass of aspirin, C9H8O4?
Determine the standard reaction enthalpy for the partial combustion of methane to carbon monoxide according to the following reaction:
what is the mass of one mole of copper atoms? How many moles of copper atoms have a mass equal to the mass of a penny?
Which instrument can be used to determine the total calcium in a small blood sample.suggest a second method suitable for determine the free calcium ions on a similar sample of bood.
temperature of 15.4°C is placed flat on a sheet of iron weighing 21.3 g and at a temperature of 46.6°C. What is the final temperature of the combined metals?
An insulated tank contains half liquid and half vapor by volume in equilibrium. The release of a small quantity of vapor without the addition of heat will cause
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