A 115. 0-g sample of oxygen was produced by heating 400. 0 g of potassium chlorate. 2KClO3 Right arrow. 2KCI 3O2 What is the percent yield of oxygen in this chemical reaction? Use Percent yield equals StartFraction actual yield over theoretical yield EndFraction times 100. 69. 63% 73. 40% 90. 82% 136. 2%.

Need ! discuss how to convert the standard form of the equation of a circle to the general form. 50 points

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

Aclassroom is made up of 11 boys and 14 girls. the teacher has four main classroom responsibilities that she wants to hand out to four different students (one for each of the four students). if the teacher chooses 4 of the students at random, then what is the probability that the four students chosen to complete the responsibilities will be all boys?