How many grams of hydrogen gas will be produced if 2.12 g of potassium reacts with sufficient hydrochloric acid?

What type of matter is made of only one kind of atom

Which statement explains why the bonds between non metals tend to be covalent? the bonds are found to be nondirectional they have large differences in electronegativity they have small differences in electronegativity they have ions that produce an electrostatic pull

How do dying stars contribute to the formation of planets