Calculate the wavelength of radiation with a frequency of 4.9 ×10^14 per second. Answer in units of meters.

6. using 3 – 4 sentences explain (in your own words) why water expands when it freezes? 7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation.

A1.5l container holds p.50 grams of an unknown gas at a pressure of 0.44 atm and a temperature of 50.c what is the molar mass of the unknown gas

Which of the following is in the lanthanide family? a) uranium b) promethium c) silver d) gold