The largest number of molecules are present in
Correct answer: A. 3.6g of water
- A. 3.6g of water
- B. 4.4g of C2H5OH
- C. 2.8g of CO
- D. 5.4g of N2O2
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
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Mole calculations connect mass, number of particles and Avogadro's number, while balanced equations provide the mole ratios used in stoichiometry. Questions cover limiting and excess reactants, theoretical yield and percentage yield, including identifying which reactant is consumed first and comparing the actual product with the maximum possible product.
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