How would our life be affected if plants could not do photosynthesis?

If photosynthesis does not occur in plants then plants cannot synthesize the food. ... The plants will not produce oxygen and then no animal life will be able to survive due to the absence of oxygen. We will not get oxygen, food, and life on this planet will be extinct.

we wouldnt be able to get oxygen which is one of the main things we need in our livessince the carbon cycle would not occur because the plants wouldnt be able to produce carbon dioxide

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)