How many moles of sodium are required to produce 40. grams of NaOH? *

2Na + 2H20 (arrow) 2NaOH + H2

.25 moles

.50 moles

1.0 mole

2.0 moles

What properties would have caused early researchers to name hydrogen "inflammable air"

Which is usually associated with a higher reaction rate? A.) diluting a solution of the reactants B.) adding modeling clay to the reactants C.) removing heat energy from the reactants D.) using a solid with a high surface area in the reactants

Identify which equations represent redox reactions, providing a name for the reaction if appropriate. For those reactions identified as redox, name the oxidant and reductant.

A 3.0 L container holds a sample of hydrogen gas at 300k. If the temperature decreases to 200k and the pressure remains constant what will the volume be

magnesium hydroxide is 54.87% oxygen by mass. how many grams of oxygen are in 175 g sample of the compound

A balloon contains 1.00 mol helium gas at STP. What will the volume of the balloon be if the pressure increases to 2.00 atm?

If 100 mL of a gas were enclosed in a buret at 500 mm Hg, what volume would the gas occupy at 1000 mm Hg at the same temperature? P1V1=P2V2

Would Mn (HPO4) 2 be manganese (II) monohydrogen phosphate?

The fundamental frequency of a violin string is 440 hz. the frequency of its second harmonic is

How much of a 15.0M stock solution do you need to prepare 250ml of a 2.35ml hf solution?