In a reaction, you combined 30 g of oxygen gas and an excess of hydrogen gas. They reacted to produce 29.7 g of water, according to the following reaction:
H2(g) + O2(8) ---> H2O(1)
a. What is the actual yield of H2O? 29.78
b. How many grams of water should you have been able to produce? (theoretical yield) ( Select ]
c. What is the percent yield? (Select]

Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution. calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.