What are the coordinates of the midpoint between (3,-7) and (-5, 2)? (-4,-4.5)
O (1, 2.5)
O (-2,-5)
(-1,-2.5)

Express the following number in scientific notation. 0.026890 =

In the following table, all the columns for the element calcium are filled out correctly. element electron structure of atom electron structure of ion net ionic charge calcium 1s22s22p63s23p64s2 1s32s22p63s23p64s1 +1 true false

Calculate the concentration of all species in a 0.165 m solution of h2co3.