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Problem- Propylene glycol (C6H8O2 , molar mass 76.09 g/mol) is a commonly used in anti-freeze for its lower toxicities in comparison to ethylene glycol. Assuming the freezing point of a solution decreases by -18.6°C, what mass of propylene glycol is dissolved in 1L of water. The molal freezing point depression constant for water is 1.86°C kg/mol
I am not able to solve the above problem somebody help me to get the correct answer
A volume of 25.0mL of 1.00M C6H5COOH is titrated against a 0.100 M NaOH solution is added to it from a burette. Compute the pH values of the solution after
As a technician in a large pharmaceutical research firm, you need to produce 300. of 1.00 potassium phosphate buffer solution of = 7.11. The of is 7.21. You have the following supplies: 2.00 of 1.00 stock solution
Suppose that an atmospheric chemist combines 165 of methane at STP, 870 of oxygen at STP, and 56.5 of at STP in a 1.8 flask.
The tricky part of this multi step synthesis is the isolation of the neutral p-aminobenzoic acid in the second step. Why is isolation so difficult
What is the partial pressure of N2(g) (in atm) in a container filled with 0.1 mol N2(g), 0.2 mol O2(g) and 0.35 mol CH4(g) when the total pressure in the container is 5.0 atm
calculate the ph of a solution that is made by combining 125 ml of 0.050 M hydrofluoric acid with 50 mL of 0.10 M sodium fluoride
A buffer contains 0.40M base, B, and 0.25M of its conjugate acid, BH+, and has a pH = 8.88. What is the pH after 0.0020mol of HCl is added to 0.25L of this solution?
use of fossil fuels.we use fossil fuels oil gas coal for many things power for transportation electricity production
calculate the weight of potassium chlorate required to prepare 380ml of wet oxygen collected over water at 20degrees
A galvanic cell consists of a Mg electrode in a 1.0 M Mg(NO3)2 solution and a Ag electrode in a 1.0 M AgNO3 solution. Calculate the standard emf of this cell at 25 °C
suppose 2.8 moles of methane are allowed to react with 5 moles of oxygen? what is the limiting reagent?How many moles of CO2 can be made from this mixture? How many grams of CO2 would produce?
find the chemical formula and the chemical name for the compounds formed between the following atoms 2.oxygen and
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