When the calculation (2.31)(4.9795x10^3)/(1.9971x10^4) is performed, how many significant digits should be reported for the answer?

Used the balanced equation 2h2+ o2 - -> 2h2o. if you have 7.2 grams of o2 , how many grams of h2o can you produce ?

Consider the nuclear equation below. 239/94 pu—-> x+ 4/2 he. what is x?

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present