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What is the final concentration if 75.0ml of a 3.50M glucose solution is diluted to a volume of 400.0ml?
Calcium cyanamide, CaCN2, reacts with water to form calcium carbonate and ammonia; CaCN2(s)+3H2O(l)-->CaCO3(s)+2NH3(g). a) How many grams of water are needed to react with 75.0 g of CaCN2
Given the reaction by the equation Mg + 2HCL yeilds H2 + MgCl2, determine to two decimal places the molar masses of all substances involved.
A 25.00mL portion of 0.00923M NaOH (MM 40.00g/mol) was introduced into the solution of H2SO4 (MM 98.08g/mol), then the excess was back titrated with 13.33mL of 0.01007M HCl (MM 36.46g/mol). Calculate the parts per million of sulfur in the sample.
What is the activation energy for a reaction if its rate constant is found to triple when the temperature is raised from 300 k to 310 k.
Under a given set of conditions, benzene C6H6 (b.p. 80°C) has a retention time of 60 seconds using a GC column. Under these same conditions, would you expect the retention time of toluene C7H8
The partial pressure of O2 in a sample of air on a mountain top is 115 mmHg. The oxygen makes up 21% of the gas in the atmosphere. What is the total atmospheric pressure on the mountain top?
A student wants to dissolve the maximum amount of CaF2 (Ksp = 3.2 * 10^-11 ) to make 1 Liter of aqueous solution. a) Into which of the following solvents should she dissolve the salt ?
For the reaction, A = B + C, the rate law is k[A]. If it takes 80.0 seconds for 70.0% of a 10.0 gram sample of A to be transformed into products, what is the value of the rate constant.
A quantity of Oxygen (g is originally at 4.75 atm and 26 degree Celsius in a 5.00 Litre container is transferred into the same container determine the total pressure in the new container?
Calculate the energy in kJ/mol needed to remove the electron from n=1 in a mole of hydrogen atoms. what is this energy called?
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: CaCO3(s) -> CaO(s) + CO2(g)
Urea { (NH2)CO } is used for fertilizer supplyingnitrogen to the soil. Calculate the number of N atoms foundin 1.68 * 10^4g of urea.
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