Do the number of protons in an atom of an element always equals its atomic weight.

Calculate the mass of products obtained when 20 g of methane undergoes combustion in the presence of 16 g of oxygen?

Why does a frog have 2 lives

During her summer vacation, Sherry decides to go to the park to do some rollerblading (1). While rollerblading, she leaves her purse in her car (2). When comes back to her car, she realizes her lips are very dry (3).

Which property would radon most likely have? A. It is stable. B. It is a solid. C. It is flammable. D. It is silver in color.

How does the kinetic energy of solids, liquids, and gases compare

Mass box A = 10 grams; Mass box B = 5 grams; Mass box C-made of one A and one B How much A and B would be needed to produce 30 grams of C? g of A; g of B.

How many moles of tin atoms are in a pure tin cup with a mass of 37.6 g?

Which best explains how Dmitri Mendeleev organized elements in his periodic table? O A. Elements were ordered based on their discovery date. O B. Elements were ordered based on their economic value. O C.

The rocks and minerals of the Earth consist of compounds.

Do the number of protons in an atom of an element always equals its atomic weight.