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Solid silicon and solid magnesium chloride form when silicon tetrachloride gas reacts with magnesium metal. Write a word equation and an unbalanced formula equation. Include all of the appropriate
What is the boiling point of the solution in which you are going to cook spaghetti if it contains 58.0 g of NaCl dissolved in 1.20 L of water?
Calculate the heat change at 100C in each of the following problems. Indicate whether heat was absorbed or released.
What is the percent by mass of NaHCO3 in a solution containing 30 g of NaHCO3 dissolved in 500 mL of H2O?
The hydrogen gas generated is collected over water at 25 C. The volume of the gas is 246 mL measured 1.00 atm. Calculate the number of grams of sodium used in the reaction.
A student was as ked to determine the molecular weight of a weak monoprotic dry acid (HX). She was provided the following laboratory equipment.
Calculate the molarity of a solution of glycerol made by dissolving 50.000 glycerol at 15 in enough water to make 330.00 of solution.
However, in water, triethylamine ((CH3CH2)3N) which should be even stronger based on stronger inductive effect, is a weaker base than dimethylamine or methylamine. Explain why triethylamine is a wea
If I place a balloon in my fridge that initially has a temperature of 220 C and a volume of 0.59 liters, what will be the volume of the balloon when it is fully cooled by my refrigerator?
When heated to 350 at 0.950 , ammonium nitrate decomposes to produce nitrogen, water, and oxygen gases:
At a certain temperature Kc = 55 and a reaction vessel contains a mixture with the following concentrations : [SO3] = 0.85 M, [NO] = 1.2 M , [SO2] = 1.5 M and [NO2] = 2.0 M. Which of the following sta
Calculate the molar concentration of oxygen, in the surface water of a mountain lake saturated with air at 20 degrees celcius and an atmospheric pressure of 665 torr.
Quicklime (CaO) is produced by thermal decomposition of calcium carbonate(CaCO3). Calculate the volume of CO2 at STP produced form the decomposition of 146 g CaCO3 by the reaction:
A wooden object from the site of an ancient temple has a carbon-14 activity of 13.0 counts per minute compared with a reference piece of wood cut today that has an activity of 104 counts per minute
Sand and iron particles that are similar in size and color are mixed together in a beaker. what would be the best method of separating the particles?
At 25 degrees of NH3 (molar mass 17 grams) effuses at the rate of .50 mole per minute. Under the same conditions, which of the following gas effuses at approximatly one-half that rate?
The enthalpy of formation of compound X is -612 kJ/mol, and the sole product of its combustion has a enthalpy of formation of -671 kJ/mol. What is the enthalpy of combustion of compound X?
A steam power plant operates on an ideal Rankine cycle with two stages of reheat and has a net power output of 120 MW. Steam enters all three stages of the turbine at 500°C.
MoS2(s) + 7/2 O2(g) MoO3(s) + 2 SO2(g) MoO3(s) + 3 H2(g) Mo(s) + 3 H2O(s) Calculate the volumes of air and hydrogen gas at 23°C and 1.00 atm that are necessary to produce 1.00 103 kg of pure mol
An 18.0-g sample of magnesium is completely burned in the presence of air to form magnesium oxide. What is the mass of the magnesium oxide obtained?
While out testing stream water quality in a local fresh water creek, you measure the dissolved oxygen concentration to be 6 mg O2(aq)/L and water temperature of 20°C.
3.0 L of He gas at 5.6 atm pressure and 25 degrees celcius and 4.5 L of Ne gas at 3.6 atm and 25 degrees celcius are combined at constant temperature into a 9.0 L flask. What is the total pressure in
A bag of potato chips contains 585 mL of air at 25°C and a pressure of 765 mm Hg. Assuming the bag does not break, what will be its volume at the top of a mountain where the pressure is 434 mm H
What is the molarity of a solution that contains 35.0 g of vitamin B1 hydrochloride (molar mass = 337 g/mol ) in 110 g of solution?
If copper has a photoelectric threshold wavelength of 279 nm, calculate the velocity (m/s) of the electron emitted when copper is illuminated with light with a frequency of 2.33 × 1015 Hz.