If you have 100 grams of H2, how many moles of H2 is that?

What is the difference in physical characteristics of lithium and sulfur?

When electron move from an excited state to their ground state a continuous spectrum is emitted.

If you could place a piece of solid silver into a container of liquid silver, would it float or sink

Describe how to find the atomic number for the element oxygen

Which type of radiation has the highest penetrating ability? alpha beta gamma nuclear

Name the 12 elements in the periodic table

Which of the following statements is true? Water is easily polluted because it can dissolve harmful chemicals O When water freezes, it contracts and becomes more dense.

What causes combustion in cars?

A potassium atom (atomic number 19) and a bromine atom (atomic number 35) can form a chemical bond through a transfer of one electron. The potassium ion that forms has 18 electrons. What best describes the bromide ion that forms?

A 0.450 g0.450 g sample of impure CaCO3 (s) CaCO3 (s) is dissolved in 50.0 mL50.0 mL of 0.150 M HCl (aq) 0.150 M HCl (aq).