Balance the following reactions. (You may just give the coefficients in front of the formulas instead writing the entire equation.)
Al(s) + NINO3(aq) —-> Al(NO3)3 + Ni(s)

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 oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

Which statement best explains the relationship between an area is geography and the temperature of its surface water