propane (c3h8) reacts with oxygen in the air to produce carbon dioxide and water. in a particular experiment, 38.0 grams of carbon dioxide are produced from the reaction of 22.05 grams of propane with excess oxygen. what is the % yield in this reaction?

In 1999, the u. s. announced trade sanctions worth $116.8 million, targeting goods from france, germany, italy and denmark. the sanctions were in retaliation for a ban on u. s. hormone-treated beef by which organization?

Tissues that carry food water and nutrients throughout the plant

On a test the graders have a mean of 77 and a standard deviation of 8. if we can approximate the distribution of these graders by a number distribution what percent of the students. a) scores higher than 77? b) should pass the test (grades > 60)? c) should fail the test (grades < 60)?