What is used to avoid demagnetization during storage of a permanent magnet. a)magnetizer
b)protector
c)keepers
d)saver​

Which of these properties, used alone, would be least useful in identifying most minerals? a. color b. luster c. streak d. density

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.

Calculate the number of moles of ethane in 100 grams