General Chemistry Answers

What is the %-solution when 123 g Li₂SO₃ are dissolved in 450. mL of water? 

A sample of Carbon dioxide in a pump has a volume of 21.5 mL and it is at 50.0 oC. When the amount of gas and pressure remain constant, find the new volume of Carbon dioxide in the pump if the temperature is increased to 75.0 oC.

 What is the molecular mass of a substance if 22.5 g dissolved in 250 g of water produces a solution whose freezing point is -0.930°C?

given the following reaction: 2 kclo₃ → 2 kcl + 3 o₂ how many grams of kclo₃ are needed to make 30.0 grams of kcl

If a 13.8 kg piece of aluminum with a specific heat of 0.129 J over grams degrees Celsius is heated from 30.0°C to 50.0°C what is the amount of energy absorbed by the aluminum

Calculate the number of moles in 168.0 g of HgS

Calculate the energy released, if a very hot metal of 100°c is dipped into water turns in to 30°c. The metal is 40 grams. Water’s specific heat is 4.18 J/g. C° (q=mCT)

Use the reaction E + F <-> 2G and the equilibrium concentrations 0.60 mol/L for E, 0.80 mol/L for F, and 1.30 mol/L for G to calculate the equilibrium constant. E, F, and G are all gases.

Calculate the pH of an aqueous ammonia solution that has an OH-concentration of 3.9 × 103M. Is the solution more basic or acidic

400ml or a 0.024 m pb(NO3)2 solution is mixed with 600ml of a 0.080 m NaCl solution. Will a precipitate from? Ksp PbCl2=1.6x10-5