How many atoms are in 8 gram of helium

Which element is most chemically similar to chlorine? Ar F Fr S

A microwave oven produces energy waves with wavelengths that are A. shorter than visible light B. longer than visible light C. the same length as visible light D. not part of the electromagnetic spectrum

How many moles of O are in 2.45 moles of H2CO3?

The following are the main assumptions of the Kinetic Molecular Theory of gases: 1. Gases are made up of molecules which are relatively far apart. 2. The molecules are in motion at high speeds. 3. The molecules are perfectly elastic. 4.

When steam is passed through red hot coke, a mixture of two gases is formed. Explain with reaction

Ions that consist of a single atom are called ... ions

Ecosystems are clearly separated from one another. Where one ecosystem stops, another begins A: True B: False

Mass_mole relationship

What is the momentum of an 800-kg car | traveling at a velocity of 10 m/s? What is its momentum if it speeds up to 50 m/s?

How many grams of CuSO4 are there in 100.0 g of hydrate? How many moles?