How many moles of oxygen are required to produce 22 g of car-
bon dioxide by the complete com-
bustion of ethene (C, H)?
[Hint: C2H4 +302 → 2C02 + 2H2O)

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?

air

in a tire you fill a tire with air

then a couple days later you check the air pressure in the tire

hope this mark me brainliest

the answer is c.the valence of the atoms combine .