Can i get some plz i'm not sure
which question can be answered by an experiment?
did an ice age kill off the mastodons?
what caused the extinction of the dinosaurs?
are all people susceptible to the hunta virus?
do sugar substitutes cause cancer?

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.

For the reaction shown, calculate how many moles of no2 form when each of the following completely reacts. 2n2o5(g)→4no2(g)+o2(g) part a 1.0 mol n2o5 express your answer using two significant figures. nothing mol m o l request answer part b 5.4 mol n2o5 express your answer using two significant figures.

Reduction is a reaction which results in a in electrons and a in positive charge of the atom or ion 1) a- loss 1) b- gain 2) a-increase 2) b-decrease