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

What is the molecular formula of a hydrocarbon with m + = 114? (write the formula with no subscripts, e. g. c4h10.) ?

A biology class wants to perform an experiment to investigate the effect of different colors of light of green, yellow, red and clear cellophane and plant three seeds in each one. What part do the three seeds experiment? a. Confounding variables b.

Consider the compound Sn (SO4) 2 and answer the following questions: a. What is the name of this compound? b. What is the molar mass of this compound? Explain how you calculated this value.

Convert 23 Milligrams to grams

Write the ka expression for an aqueous solution of nitrous acid:

When does a spring tide take place? At the beginning of spring Only during the spring season Only after spring is over At any time

The highest cloud are known as

What is the mass of 4.85 X 10^22 atoms of iron (Fe) ?

If element x has 95 protons how many electrons does it have

Which of the following when dissolved in deionized water would make a good conducting solution? a) methanolb) sugarc) baking soda