What is the pH of a solution with a 7.8 × 10−13 M hydronium ion concentration? A) 1.9
B) 2.8
C) 11
D) 12

In france, grapes are 1.95 euros per kilogram. what is the cost of grapes, in dollars per pound, if the exchange rate is 1.14 dollars/euro? (2.6)

Consider the following multistep reaction: a b→ab(slow) a ab→a2b(fast)−−−−−−−−−−−−−−−−− 2a b→a2b(overall) based on this mechanism, determine the rate law for the overall reaction. express your answer in standard masteringchemistry format. for example, if the rate law is k[a]3[b]2 type k*[a]^3*[b]^2

How many oxygen atoms are there in 3.15 moles of hcl manganese (iv) oxide, mno2