Magnesium has three naturally occurring isotopes: mg-24 with mass 24.3050 amu and a natural abundance of 78.99 %, mg-25 with mass 24.9858 amu and a natural abundance of 10.00 %, and mg-26 with mass 25.9826 amu and a natural abundance of 11.01 %.
calculate the atomic mass of magnesium.

Agas diffuses 1/7 times faster than hydrogen gas (h2). what is the molar mass of the gas? 100.10 g/mol 98.78 g/mol 86.68 g/mol 79.98 g/mol

How many moles of al3+ ions are in 1.25 moles of al2o3

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