Element z has two naturally occurring isotopes. Its first isotope has a mass of 28. 0 amu and a natural abundance of 64. 24%. Its second isotope has a mass of 25. 0 amu. What is the average atomic mass of element z?

To safely control the traffic flow and protect workers near public roadways and moving construction equipment use you could use

If the null hypothesis is false and the researchers do not reject it a type 2 error has been made. true or false

Ten students compared the amount (in dollars) they spent on books each week. the box plot shows the results. the median amout they spent each week is . the difference of the first and third quartiles of the data set is?