How many moles of ions are in 285 ml of 0.0150 m mgcl2?

Nutrients classified as "organic molecules" have a molecular structure which contains the element

11. The least chemically reactive of the hydrocarbon families are the a) alkanes c) alkynes b) alkenes

By what factor must the absolute temperature of a gas be increased to increase the rms speed of its molecules by a factor of 3?

Container a holds 762 ml of ideal gas at 2.50 atm. container b holds 149 ml of ideal gas at 4.90 atm. if the gases are allowed to mix together, what is the resulting pressure?

What is the whole mass of air surrounding earth?

A substance is analyzed and found to contain 85.7% carbon and 14.3% hydrogen by weight. A gaseous sample of the substance is found to have a density of 1.87 g/L, and 1 mol of it occupies a volume of 22.4 L.

Which property of a mineral sample does not influence how quickly it settles in water? 1) density 2) hardness 3) shape 4) size

Dinitrogen difluoride gas is collected at in an evacuated flask with a measured volume of. When all the gas has been collected, the pressure in the flask is measured to be.

How is the mass number of an isotope expressed in the name of an atom?

1. A sample of sodium chloride (NaCl) has a mass of 28.36g. Calculate the number of moles of NaCl in the sample. Show your work. 2. Calculate the number of moles of each element (number of moles of Na and number of moles of Cl) in NaCl in the sample.