A scientific law:
is well tested
is usually an equation
is an example of a scientific model
all of the above

650.j is the same amount of energy as? 2720cal1550cal650.cal2.72cal

The chemical equation below shows the reaction of sodium (na) and chlorine (cl) to form sodium chloride (nacl). 2na + cl2 → 2nacl in this equation, which of the following is a reactant? i. sodium ii. chlorine iii. sodium chloride

Using the periodic table, complete the following. element: hydrogen symbol: h₂ molecular weight: g mass of one mole: g/mol