Calculate the speed of a wave with a wavelength of 6 meters and a frequency of 3 hertz. You should be using the formula
speed = wavelength x frequency

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

Which position represents spring in the southern hemisphere? a) b) c) d)

The following reaction shows sodium carbonate reacting with calcium hydroxide. na2co3 + ca(oh)2 → naoh + caco3 how many grams of naoh are produced from 20.0 grams of na2co3? (molar mass of na = 22.989 g/mol, c = 12.01 g/mol, o = 15.999 g/mol, ca = 40.078 g/mol, h = 1.008 g/mol) 12.2 grams 15.1 grams 24.4 grams 30.2 grams