Answer:
B 10 to 20
Explanation:
0×4 = 0
10×4 = 40
20×4 = 80
30×4 = 120
40×4 = 160
60 is in between 40 and 80, so the interval into which the answer should fall is 10 to 20
190 g of water
60 g of KI
Explanation:
For concentration expressed in mass percentage of the solution we have the following formula:
concentration / 100 = mass of the dissolved / mass of the solution
mass of the dissolved KI = (concentration × mass of the solution) / 100
mass of the dissolved KI = (24 × 250) / 100 = 60 g
mass of the solution = mass of the water + mass of the dissolved KI
mass of the water = mass of the solution - mass of the dissolved KI
mass of the water = 250 - 60 = 190 g
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mass percent concentration
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SI unit of length - meters
