PLZ HELP AND HURRY WILL MARK BRAINLIST IF U SHOW WORK When enough energy is present, water will decompose into hydrogen and oxygen gases according to the following reaction:

2 H2O → 2H2 + O2

What mass of water, in grams, must react to produce 25 g of O2?
The molar mass of water is 18.01 g/mol
The molar mass of oxygen is 32.00 g/mol

Show all steps in the solution of this question, including proper units, for full credit !!

The electron configuration for chromium is 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 5 4 s 1 instead of 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 4 4 s 1 . the configuration is an exception to the

The following reaction shows the products when sulfuric acid and aluminum hydroxide react. al(oh)3 + h2so4 → al2(so4)3 + h2o the table shows the calculated amounts of reactants and products when the reaction was conducted in a laboratory. initial mass and yield sulfuric acid aluminum hydroxide initial amount of reactant 40 g 15 g theoretical yield of water from reactant 14.69 g 10.38 g what is the approximate amount of the leftover reactant? 11.73 g of sulfuric acid 10.33 g of sulfuric acid 11.12 g of aluminum hydroxide 13.67 g of aluminum hydroxide

Which statement can best be concluded from the ideal gas law?