Calculate the number of moles contained in 550ml of carbon dionide at stp

In this chemical reaction, 325 grams of barium (ba) react completely. how many moles of lithium (li) are produced?

Ted and emily played a mixed doubles tennis match against jack and brenda. in the second match. ted and brenda played against jack and emily. which type of chemical reaction does the situation demonstrate?

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)