If you have 5235 pennies how many grams would they weigh

If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same

What volume would 2.25 moles of ne has occupy at stp?