The largest number of molecules are present in

Explanation

To find the largest number of molecules, we need to calculate the number of moles for each substance. Using the formula n=Mm where n is the number of moles, m is the mass, and M is the molar mass, we can determine the number of moles for each substance.Here are the calculations:a. For water (H2 O): =3.6/18.015≈0.1999 molb. For ethanol (C2 H5 OH): =4.4/46.07≈0.0956 molc. For carbon monoxide (CO):=2.828.01≈0.0999 mold. For dinitrogen tetroxide (N2 O2 ): =5.492.02≈0.0587 molNow, comparing these values, we see that the largest number of moles is for water (H2 O), so the correct answer is: a. 3.6g of water