Question

Which of the following represents the least number of molecules?

a) 3×1022 molecules of oxygen (O2)
b) 1×1023 molecules of water (H2O)
c) 2×1022 molecules of nitrogen (N2)
d) 4×1023 molecules of methane (CH4)

Answer 1

Option (c) 2×1022 molecules of nitrogen (N2) represents the least number of molecules when compared directly by their given numerical values. Option C

Step-by-step explanation:

To determine which option represents the least number of molecules, we simply compare the given numbers since all options are directly stated as the number of molecules:

(a) 3×1022 molecules of oxygen (O2)

(b) 1×1023 molecules of water (H2O)

(c) 2×1022 molecules of nitrogen (N2)

(d) 4×1023 molecules of methane (CH4)

Comparing the exponents and coefficients, we can see that option (c) with 2×1022 molecules has the smallest exponent and coefficient, which indicates it has the least number of molecules. Option C