Given the balanced equation representing a reaction:

F2 (g) + H2 (g) = = > 2HF (g)

What is the mole ratio of H2 (g) to HF (g) in this reaction?

(1) 1:1 (3) 2:1

(2) 1:2 (4) 2:3

When a gamete is formed, what is the term given to the cell according to the number of chromosomes it has?

A handbook gives the density of calcium as 1.54 g/cm3. based on lab measurements, what is the percentage error of a density calculation of 1.25 g/cm3? 37. what is the percentage error of a length measurement of 0.229 cm if the correct value is 0.

All stable atoms are what?

Which compound will conduct electricity when it is dissolved in water?

Which set of terms best defines what affects kinetic energy and potential energy, respectively? position, gravity gravity, velocity velocity, height height, position

If 125 mL of a 1.1 M glucose solution is diluted to 500.0 mL, what is the molarity of the diluted solution? Express your answer using two significant figures.

What do you chemically call water?

Can beryllium be broken down by chemical change?

What is the total number of atoms in this formula? NaHCO3

An object was measured by a worker as 14.6 cm long, however, the manufacturer specifications list the length of the object at 14.4 cm. What is the percent error in the workers measurement