Moles

How many moles of water are needed to react with 2.2 moles of Li2O? Give: Li2O + H2O > 2LiOH

Mass Percent

What is the mass percent of a solution prepared by dissolving 18.9 grams of solid into 39.5 grams of water?

molarity

What is the molarity of a solution prepared by disolving 10.7 g NaI in 0.250 L

Final Concentration

What is the final concentration of a solution prepared by diluting 35 mL of 12.0 M HCl to a final volume of 1.20 L?

Mass Percent, atom percent, mass fraction, elemental fraction

To do any mass percent question one must first understand a little about fractions. If one has a fruit basket, with 3 apples, 2 oranges, 4 bananas, and a grapefruit, we could say that there is %30 apples in the basket, %20 oranges and so on if we were talking about the percentage by fruit. If we were talking about percenta ...continues

Henry's Law and Molality

What is the maximum # of Grams of CO2 gas that can dissolve in 1.00 liter of water at 25 degrees C if the partial pressure of the CO2 gas is 57.00 mmHg? The Henry's Law constant for CO2 is .000048 M/mmHg. What is the Molality of a solution made from dissolving 0.395 g of NaCl in 45.7mL of water? The density of the water i ...continues

Mole Fraction and Conversions

What is the mole fraction of ethanol (C2H5OH) in a solution made by mixing a 20.0g sample of ethanol with 80.0g of water? What is the mole fraction of methanol (CH3OH) in a 92.5m aqueous solution? Please show all work and explain each step.... It has been a while since I have taken chem and this is not my best subject. ...continues

henry's law and molarity

What is the maximum # of Grams of CO2 gas that can dissolve in 1.00 liter of water at 25 degrees C if the partial pressure of the CO2 gas is 57.00 mmHg? The Henry's Law constant for CO2 is .000048 M/mmHg I was given the formula S=KP Using the factor-label method and expressing the answer to the correct number of signific ...continues

arranging half-cell reactions in order

Arrange the following five reduction half-cell reactions in order listing the largest positive reduction potential first and give the best oxidizing and reducing agents.... Observations: i) A reacts spontaneously with 1 mol/L BNO3, 1 mol/L D(NO3) and dilute sulfuric acid. A does not react 1 mol/L C (NO3) ii) B does not ...continues

Please not by TA 103997 Osmotic Pressure and Molar Mass

Please show ans explain all work, including all parts of the formulas. Osmotic Pressure. What is the osmotic pressure (in mm Hg) of a solution at 25.0°C made by dissolving 0.0135 grams of tryptophan (C11H12N2O2) in enough water to give 75.0 mL of solution? Osmotic Pressure & Molar Mass. A 0.0116-gram sample of an ...continues