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Determine how many grams of resin are needed to remove the calcium ions from 200 mL of water that has 15.4 grains/gallon of hardness, if the resin exchange capacity is 2.78 millimoles of divalent cation per gram of resin.
If 33.0 L of a gas is collected at 23 °C and 255 kPa, what is its volume at STP?
At 1.00 bar and 0 °C, a 5.04 L mixture of methane (CH4) and propane (C3H8) was burned, producing 16.5 g of CO2. What was the mole fraction of each gas in the mixture? Assume complete combustion.
how the molecules formed?
If 0.230 g of sodium metal reacts with 0.355 g of chlorine gas, what is the mass of sodium chloride produced?
calculate the percent yield when 1.00x10^3 grams of methane is combusted to yield 2.30 kilograms of carbon dioxide?
what the volume of 88 grams of carbon dioxide?
a)How many grams of NH3 can be produced from 4.12mol of N2 and excess H2.
b)How many grams of H2 are needed to produce 10.71g of NH3?
c)How many molecules (not moles) of NH3 are produced from 7.31×10−4g of H2?
b)How many grams of H2 are needed to produce 10.71g of NH3?
c)How many molecules (not moles) of NH3 are produced from 7.31×10−4g of H2?
how do you make calcium carbonate hard? how much calcium and how much water should be mix and plus what other chemical can be added to make it hard?
what are the advantages and disadvantages of ethanoic acid as a de-scaler
