How many formula units are in 21.8 grams of iron (|||) dioxide

Ineed with a, b, c, d, and e on the long answer

What is the percentage composition of carbon in the compound ch4

What will most likely happen in the absence of a cell membrane? a) photosynthesis will not take place. b) the cell will not store food, water, nutrients, and waste. c) energy will not be released during cellular respiration. d) substances will pass in and out of the cell in an uncontrolled manner.