What two properties do all forces have?

Needthe meter is the standard unit for: 1) height 2) length 3) weight 4) mass

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

Find the mass in grams of 1.37x1020 particles of h3po4