How do I balance chemical equations?

What is the mass of 3.01 x 10^23 molecules of oxygen?

The molar mass of magnesium fluoride is?

Which phrase describes a biotic factor? A. amount of sunlight on a field B. horses on a prairie C. water clarity D. air pressure

When naming organic compounds, there are strict rules regarding punctuation?

In their Lewis Dot Structures, the halogen atoms would all have the same number of dots surrounding their symbols. A. True B. False

Why did Bromophenal solutions change from yellow to blue (what chemical reaction happended) ?

How many milliliters of calcium, with a density of 1.55 g/mL, are needed to produce 85.8 grams of calcium fluoride in the single replacement reaction below? Show all steps of your calculation as well as the final answer.

If object A is placed on the pH scale at pH = 3 and object B is placed at pH = 8, which of the following must not be true? A. Object B has a higher hydroxide ion concentration than object A. B. Object B is closer to a neutral pH than object A. C.

Laboratory safety is not an important concern for scientists. True or false

Which of the bonding forces from the list below would need to be overcome to convert NH3 from a liquid to a gas? (Enter the letters in order of all that apply, e. g. AB, ABD, ACDE, etc.