A sample of formic acid (CH2O2) contains 4.05 x 1020 molecules. How many moles of formic acid are in this sample? Be careful: round to the nearest 0.00001 and
include both units and substance in your answer.

What state of matter is ice a. liquid b. element c. solid d. gas

Question 3(multiple choice worth 4 points) (04.04 lc) what does it mean when an element is reduced? it empties a valance shell, reducing its atomic radius. it gains electrons, reducing its overall charge. it increases electronegativity, reducing its ability to bond. it loses electrons, reducing its electron number.

What is the area in square meters of 448 g ai foil that has a thickness of 23921 nm? the density is 2.70 g/cm