Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
A 5.0g sample of a hydrate of CaCl2 was heated, and only 4.3 g of the anhydrous salt remained. what is the percentage of the water was in the hydrate?
How many grams of ammonium sulfate can be produced in 30 mol of H2SO4 react with excess NH3 according to the equation 2NH3(aq)+H2SO4(aq)-->(NH4)2SO4(aq)?a
what is the volume of dry gas at standard conditions? The vapor pressure of water is 92.5mm Hg at 50.0 degrees celsuis.
Calculate the mass of oxygen (in mg) dissolved in a 5.00 L bucket of water exposed to a pressure of 1.13 atm of air. Assume the mole fraction of oxygen in air to be 0.21 and the Henry's law constant
A 14.0 g sample of CaCl2 is dissolved in 121 g of water, with both substances at 25.0°C. Calculate the final temperature of the solution assuming no heat lost to the surroundings and assuming th
What volume of 0.131 M BaCl2 is required to react completely with 42.0 mL of 0.453 M Na2SO4? The net ionic equation for the reaction is Ba2+(aq) + SO42-(aq) --> BaSO4(s)
An experiment shows that a 247mL gas sample has a mass of 0.432 gas at a pressure of 752 mmHg and a temperature of 28C. What is the molar mass of the gas?
A compound contains only carbon, hydrogen, and oxygen. Combustion of 0.01068 g of the compound yields 0.01601 g of CO2 and 0.00437 g of H2O. The molar mass of the compound is 176.1 g. What are the e
An unknown sample of Cu2+ gave an absorbance of 0.262 in AA analysis. Then 1.00 ml of solution containing 100.0 ppm Cu2+ ws mixed with 95.0 ml of unknown and diluted to 100 ml in a volumetric flask,
Calculate the pressure (in atm) exerted by 1.00 mole of acetylene at 125°C in a 20.0-liter container. The van der Waals constants for acetylene are: a = 20.0 L2 • atm/mol2, b = 0.100 L/mol
If a student determined that the circumference of a balloon filled by the boiling point of liquid nitrogen was 45 cm, what volume of nitrogen gas has been generated?
What is the insataneous rate at t=800s? What is the insataneous rate at t=800s?
If a mixture of solid palladium(II) oxide and 0.10M carbon monoxide is allowed to come to equilibrium at 1000K, what will be the equlibrium concentration of CO2.
Given that the rate constant for the decomposition of rm X is 1.60 {M}^{-1}cdotrm min^{-1}, calculate the concentration of rm X after 11.0 min.
n photosynthesis, plants use energy from the sun in combination with carbon dioxide and water to form glucose (C6H12O6) and oxygen. If 4.50 moles of water react with carbon dioxide, what mass of gl
What is the class and subclass of Fe(s) + CuSO4 → FeSO4(aq) + Cu(s) ? I believe it is double replacement, but would it be precipitate or acid-base?
A sodium thiosulfate, Na2S2O3, solution has a concentration of 0.175 M. An end point for this titration occurs when 48.94 mL of the sodium thiosulfate solution reacts with 22.45 mL of I2 solution. W
Calculate the concentration of {rm O_2} if K_c = 270 for the reaction 2{rm SO_2} left( g right); + ;{rm O_2} left( g right); rightleftharpoons 2{rm SO_3} left( g right).
The canister is placed in an oven until all the rm H_2O has boiled off and the canister is empty. How much energy in calories was absorbed?
Compound A is C4H9Cl and shows two 13C NMR resonances. Compound B is an isomer of compound A; it shows four 13C NMR resonances, and in the spin-coupled mode the resonance farthest downfield is a do
Calculate the mass in grams of carbon dioxide that will be produced when 25.0 g of ethanol is burned.
A 10 mL sample of the dilute solution was found to contain 0.021 moles of Pb2+. What was the concentration of Pb(ClO3)2 in the original undiluted solution?
The activation energy for the following reaction is 60. kJ/mol. Sn2+ + 2Co3+ → Sn4+ + 2Co2+
A quantity of 2.00x10^2 ml of 0.862 M HCl is mixed with 2.00x10^2ml of 0.431 M Ba(OH)2. What is the final temperature of the mixed solution?
A solution has a volume of 2.0 L and contains 36.0 g of glucose. If the molar mass of glucose is 180g/mol, what is the molarity of the solution? Answer must be expressed in dimension analysis.