A sample of chloroform is found to contain 12.0 g of carbon. 106.4 g of chlorine

Question

A sample of chloroform is found to contain 12.0 g of carbon. 106.4 g of chlorine, and 1.01 g of hydrogen. If a second sample of chloroform contains 30.0 g of carbon, what is the total mass of the second sample? 30.0 g 299 g 119 g 2.53 g 266 g Using the data below, which choice is most likely to be the fourth ionization energy(IE_4) of Si. IE_1 = 780 kJ/mol IE_2 = 1575 kJ/mol IE_3 = 3220 kJ/mol IE_4 = ? IE_5 = 16100 kJ/mol 1295 kJ/mol 21450 kJ/mol 4350 kJ/mol 15120 kJ/mol 9300 kJ/mol How many significant figures should the answer have? (0.02150 times 4000.0)/(995 + 10.755) 1 2 3 4 5

Explanation / Answer

Answer (13)

Mass of first sample of chloroform =12.0 + 106.4 + 1.01 = 119.41 g .........

so mass of second sample = 119.41 x 30 / 12 = 298.525 g .

= (b) 299 g

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