An element Q has three naturally occurring isotopes. One of the isotopes has a mass of 20amu and an abundance of 90.48%, the second has a mass of 21amu and abundance of 0.27% and the third has a mass of 22amu. Calculate the percentage abundance of the third isotope.
Calculate the relative atomic mass of element Q

1) this is the structure in the cell nucleus that houses a cell's genetic information

When 13.3 g koh is dissolved in 102.7 g of water in a coffee-cup calorimeter, the temperature rises from 21.4 °c to 31.53 °c. what is the enthalpy change per gram of koh (j/g) dissolved in the water? * take the density of water as 1.00 g/ml. * assume that the solution has a specific heat capacity of 4.18 j/g*k. enter to 1 decimal place. do not forget the appropriate sign /(+). canvas may auto-delete the (+) sign

What is the effect of returning nuclear reactor cooling water back into bodies of water?