It is well known that the element magnesium has three naturally occurring isotopes. mg-24 represents 79.0% of all magnesium atoms, mg-25 accounts for 10.0%, and mg-26 is the remaining 11.0%. if you have 226. atoms of magnesium, how many should be mg-24?

Structure of the atoms: discovery of the nucleus in 1909i need answering all of these questions

For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)

How many moles of no2 will form when 3.3 moles of cu are reacted with excess hno3?