How many moles of helium are contained in a 2.5L vessel at 300K under a pressure of 5.35atm?

A 36.165 mg sample of a chemical known to contain only carbon, hydrogen, sulfur, and oxygen is put into a combustion analysis apparatus, yielding 64.425 mg of carbon dioxide and 26.373 mg of water. In another experiment, 47.

A tire at 21°C has a pressure of 0.82 atm. Its temperature decreases to - 3.5°C. If there is no volume change in the tire, what is the pressure after the temperature change?

What is diffusion and osmosis?

The center of the earth is very hot

Consider the perbromate anion. What is the central atom? Enter its chemical symbol. How many lone pairs are around the central atom? What is the ideal angle between the bromine-oxygen bonds?

Which tool is most suitable for a chemist to measure the mass of a liquid

What is the equation adheres to the law of conservation of matter

What ironic contrast does Vonnegut include in this scene? George tells his wife to forget sad things, but readers would expect George and Hazel to want to remember their son.

When the Sun is in its maximum solar cycle, which of the following occurs? A. One CME is produced every five days B. There is an unpredictable amount of energy C. Up to three CMEs are created in one day D. Protons and neutrons accelerate

How many daughter cells are produced in meiosis?