What is the chemical sentence for fes (s) + hcl (aq) →fecl2 (aq) + h2s (g)

How can you use evidence to determine if a change is physical or chemical?

What are the three types of mixtures?

When might a theory or scientific claim be modified or changed?

The smallest particle from among the following is A. Li+ B. F C. F- D. Li

Which compound is a non-electrolyte: 1) HCl 2) CH3OH 3) KBr 4) NH3

Which property can be defined as the ability of a substance to be hammered into thin sheets

Select the group of organelles that is common to both plant cells and animal cells. A. nucleus, cytoplasm, ribosomes, chloroplasts B. cell wall, ribosomes, cell membrane, mitochondria C. cytoplasm, mitochondria, cell wall, nucleus D.

A compound is found to have a composition of 70.4% carbon and 29.6% hydrogen, by mass. what is the empirical formula for the compound?

As you go down a family or group on the periodic table * the atoms become smaller and smaller. the elements become less reactive. the elements become more reactive. the atoms have more and more valence electrons.

What is the name of the horizontal rows in the periodic table?