How many electrons would it take to equal the mass of a helium nucleus?

How many moles of atoms 7.98x 10^24 C2H2 25.8 grams of Co

A sample consisting of 1.00 mol of perfect gas molecules at 27 °C is expanded isothermally from an initial pressure of 3.00 atm to a final pressure of 1.00 atm in two ways: (a) reversibly, and (b) against a constant external pressure of 1.00 atm.

How many atoms are in a sample of copper with a mass of 18.46 grams? 2. How many formula units are in a sample of salt with a mass of 67.69 grams? 3. How many molecules are in a sample of water with a mass of 44.99 grams? 4.

29 Positrons and beta particles have (1) the same charge and the same mass (2) the same charge and different masses (3) different charges and the same mass (4) different charges and different masses

What is the molarity of ammonia if it is 1.0 ionized?

What are small round structures in the cell that breaks down large food particles into smaller ones

A balloon has a volume of 2.5 L and contains 0.100 moles of Helium. Another balloon has a volume of 5.0 L. They are at the same temperature and pressure. How many moles of gas does the second balloon contain?

Why is it important to that the solid be dry before the final mass measurement?

What is 0.00055030 in Scientific form?

What happened to the rate of the forward reaction and the rate of the reverse reaction as time progresses. Describe the rates when the reacion reaches equilibrum.