What mass of hydrogen is produced when 49.0 grams of sodium reacts with 30.0 grams of water

How many hydrogen atoms are in 2NH3

The chemical reaction of oxygen with other substances is called A. erosion. B. acidification. C. oxidation. D. exfoliation.

What is the 4th element aside from liquids, solids, and gases.

In an experiment forest, a sample of leaves is weighed over a one year period and is found to lose 83% of its mass. assuming first order kinectics, what is the rate constant for their decomposition

The density of mercury is 13.6 g/cm3. What volume (in quarts) is occupied by 100. g of Hg? (1 L = 1.06 qt)

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.

A precipitate of zinc hydroxide can be formed using the reaction below. ZnCl2 (aq) + 2 KOH (aq) → Zn (OH) 2 (s) + 2 KCl (aq) If excess KOH is used, the zinc hydroxide will form zincate ions and dissolve in the solution according to the chemical

Which of the following is the correct (unbalanced) equation for the reaction that takes place when solid phosphorus combines with oxygen gas to form diphosphorus pentoxide? A. P (s) + O2 (g) - -> P2O5 (s) B. P2O5 (s) - -> P2 (s) + O2 (g) C.