In the chemical formula below: 4 C2 H5F + 13 O2 _> 8C O2 + 10 H2 O + 2 F2

How many molecules are on the reactants side of the chemical formula?

A.17

B.20

C.4

D.13

the father in the first generation probably had the recessive colorblind trait in his x chromosome. if he and his wife both had the colorblind trait, even if she had 1 recessive and 1 dominant, then that trait would be passed on to their kids.

(since you didn't attach the family tree this is just an assumption)

what is this saying?

the answer is c. altitude. hope this ! #brainiac

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.