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The compound X2Y has a molar mass of 110.27 g/mol. The ratio of X:Y (by mass) in the compound is 2.44 : 1. What is the compound? The name of the compound is ??
A sample of gas is collected over water at a temperature of 28.0°C when the barometric pressure reading is 742.5 torr. What is the partial pressure of the dry gas?
How much energy will be needed to heat 45.7 gal of water from 22.0 oC to 110.0 oC? (Note that temperature 110.0 oC can be at a certain pressure greater than 1 atm. Note that 1.00 gal weighs 3.77 kg
A 6.75-g sample of gold (specific heat capacity = 0.130 J/g oC) is heated using 34.6 J of energy. If the original temperature of the gold is 25.0 oC, what is its final temperature?
Suppose 600. g of P4 reacts with an excess of S8. How many grams of P4S10 can be produced, assuming 80.0% yield based on the limiting reactant?
Given the reaction 4Al(s)+302(g)--2Al2O3(S),what is the minimum number of moles of oxygen gas required to produce 1.00 mol of aluminum oxide?
A piston has an external pressure of 15.0 . How much work has been done if the cylinder goes from a volume of 0.150 liters to 0.530 liters.
Calculate the equilibrium constant, Kc, she obtained for this reaction.
Even with a drying tube, leaving phenylmagnesium bromide exposed to air will eventually lead to its decomposition. Why? What is the product of this decomposition pathway?
A specimen of iron ore weighing 0.500g was dissolved in dilute sulphuric acid. The solution was titrated with 0.0200M potassium permanganate, 6.25cm3 being required. The solution was reduced electro
The rate-determining step is the decomposition of the intermediate enzyme-substrate complex (ES) to prodcuts (P). Under these conditions, show that the overall rate of product formation is
If 94 of heat are added to a pure gold coin with a mass of 16 , what is its temperature change? Specific heat capacity of gold is 0.128 .
What are the freezing point and boiling point of an aquenous solution of 15.5g glucose (C6H12O6) dissolved in 150 g of water?
Imagine that you dissolve 10.0g of a mixture of NaNO3 and KF in 100.0g of water and find that the temperature rises by 2.00 degrees C. Using the following data, calculate the mass of each compound i
Explain the order of elution you observed while performing the gas chromatography for this experiment. What property of the product molecules seems most important in determining relative retention t
What is the percent yield if 4.65g of copper is produced when 1.87g of aluminum reacts with an excess of copper(II) sulfate?
Determine the empirical formula of sodium azide.
Design a range of five volumes of the NaCl standard solution that you will spike into equal aliquots of the unknown. First decide what volume of tonic water unknown to add to each 25-mL volumetric f
Electromagnetic radiation has an energy of 926 J. The wavelength of this radiation is 856 nm. How many photons are required to generate this energy?
A solution of sodium chloride in water has a vapor pressure of 20.1 torr at 25°C. What is the mole fraction of NaCl solute particles in this solution?
How many grams of NO(g) can be formed from 5.0 moles of NH3(g) if there is sufficient O2(g) to use all of the ammonia?
Calculate the amount of energy in kilojoules needed to change 243 g of water ice at -10 rm ^{circ}C to steam at 125 rm ^{circ}C. The following constants may be useful:
A lead fishing weight with a mass of 41 g absorbs 146 cal of heat. If its initial temperature is 54°C, what is its final temperature?
A 265- flask contains pure helium at a pressure of 757 . A second flask with a volume of 485 contains pure argon at a pressure of 714. what is the partial pressure of helium.