Answer:
It would produce ethane (CH₃CH₃)
Explanation:
Ethylmagnesium bromide (CH₃CH₂MgBr) is a Grignard's reagent.
It is a highly reactive substance, and as any alkylmagnesium bromide
(R-CH₂MgBr) it reacts with water to produce an alkane (R-CH₃). R stands for any carbon structure bonded to that functional group.
C. C6H1206 because glucose is used to make ATP
Answer:
A) Atom
Explanation:
An atom includes letters B, C, and D, so it must be the biggest.
At the beginning there was just
1 mole of hydrogen and
1 mole of iodin.
The reaction goes:

One mole of hydrogen goes with one mole of iodin, creating
2 moles of product.
If 0.8 of hydrogen remaind, it means that
1-0.8=0.2 reacted.
So:
1 mole H2 react with 1 mole I2 creating 2 moles of products.
So 0.2 of hydrogen reacted with 0.2 mole of iodin creating 0.4 moles.