What is produced during the replacement reaction of cu(no3)2 and zn?

Agas mixture with a total pressure of 745 mmhg contains each of the following gases at the indicated partial pressures: co2, 245 mmhg ; ar, 119 mmhg ; and o2, 163 mmhg . the mixture also contains helium gas. part a what is the partial pressure of the helium gas? phe p h e = nothing mmhg request answer part b what mass of helium gas is present in a 10.2-l sample of this mixture at 283 k ? m m = nothing g request answer

Joan writes four numbers on the board in standard form, and then she writes their scientific notation

When the speed of the bottle is 2 m/s, the average maximum height of the beanbag is m.