Hydrogen is 99% H-1, 0.8% H-2, and 0.2 H-3. calculate its average atomic mass

Which of the following will be the result of dissolving a substance? Select all that apply. a chemical change making a new chemical separating solute particles from the mass of solute making a solution

Which process does not involve a chemical change? 1. cleaning the shower with lime away 2. burning charcoal on the grill 3. boiling water 4. digesting food?

An element belongs to group 9. what common name might be used to describe the group to which this element belongs?

How many valence electrons does holmium have?

This element has an atomic number that is double the atomic number of silicon. What element is it?

What is the best category for nf3? 1. amphoteric ion 2. lewis acid 3. salt 4. bronsted-lowry acid 5. arrhenius acid 6. arrhenius base 7. lewis base 8. weak electrolyte?

100 g = ___hg for science

A real gas behaves more like an ideal gas when the gas molecules are

How many moles are in 12.5 g of H2O

Substance which allows energy to pass through it