Question

Qia \( { }^{3} \) The compasition of air by mass is \( 75.5 \% \) nitrogen \( \left(\mathrm{N}_{2}\right), 23.2 \% \) oxygen \( \left(\mathrm{O}_{2}\right) \), and \( 1.3 \% \) argon (on.). What is the average molecular mass of air? In other words, what is the mass of \( 6.02 \times 10^{23} \) molecules of air? (b) Some species of hummingbirds flap their wings more than 50 times per second. If a scientist wants to measure the time for one wingbeat, which fundamental unit. should be used for the measurement? What power of 10 would best describe the measurement accurately? Also, specify the metric prefix corresponding to this power of 10 .

          Qia \( { }^{3} \) The compasition of air by mass is \( 75.5 \% \) nitrogen \( \left(\mathrm{N}_{2}\right), 23.2 \% \) oxygen \( \left(\mathrm{O}_{2}\right) \), and \( 1.3 \% \) argon (on.). What is the average molecular mass of air? In other words, what is the mass of \( 6.02 \times 10^{23} \) molecules of air?
(b) Some species of hummingbirds flap their wings more than 50 times per second. If a scientist wants to measure the time for one wingbeat, which fundamental unit. should be used for the measurement? What power of 10 would best describe the measurement accurately? Also, specify the metric prefix corresponding to this power of 10 .

Qia ^3 The compasition of air by mass is 75.5 % nitrogen (N2), 23.2 % oxygen (O2), and 1.3 % argon (on.). What is the average molecular mass of air? In other words, what is the mass of 6.02 × 10^23 molecules of air?
(b) Some species of hummingbirds flap their wings more than 50 times per second. If a scientist wants to measure the time for one wingbeat, which fundamental unit. should be used for the measurement? What power of 10 would best describe the measurement accurately? Also, specify the metric prefix corresponding to this power of 10 .

Added by Eric L.

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