Answer: 4 molL-1
Explanation:
Detailed solution is shown in the image attached. The number of moles of NaCl is first obtained. Since the molarity must be in units of molL-1, the volume is divided by 1000 and the formula stated in the solution is applied and the answer is given to one significant figure.
Answer: option B. 100 g C2H4
Explanation:Please see attachment for explanation
The answer to your question is 12.01. I really hope this helps!
I don’t have a periodic table nearby but I believe the answer is C, iron.