The molar masso stronie) is 87.625 mol Calculate the number of atoms in a 67.5 mg sample of Sr. Write your answer in soncc notation using three sign icontres atoms SI 430 - 1020 4.30x10 /20​

Elena is paid a constant rate for each hour she works. the table shows the amounts of money that elena earned for various amounts of time that she worked.

Ibeg you to me 20. a reaction produces 4.93 l of oxygen, but was supposed to produce 1 mol of oxygen. what is the percent yield?

Apyramid fits exactly inside a cube. the cube and the pyramid share the same square base, and they are both exactly the same height. the volume of the cube is 66 cubic inches. what is the volume of the pyramid? explain your answer. answer asap