What is the atomic number of an atom with 51 protons and 25 neutrons? 76, 51, 25

There are 6.022, 104 atoms of hg in 1 mole of hg the number of atoms in 45 moles of hg can be found by multiplying 4.5 by 6.022, 102 which is the number of atoms in 4.5 moles of hg, correctly written in scientific notation with the correct number of significant figures? 0 21,109 0 21,100 271, 1024 27.099, 100 mark this and retum save and exit submit

How many grams of phosphorus are contained in 5.09 moles of phosphorus?

How many grams of c3h8 is needed in the reactants to produce 10.5 mil of h2o