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A box contains balls of different colors. There are 13 blue balls, 15 green balls, and 19 white balls in the box. Determine the percentage of green balls in the box. Round the answer to the nearest whole number.
Cyanide is one of the most deadly poisons. A dose of 0.20 g of cyanide is fatal for a person with a body mass of 7.0 × 104 g. Determine the mass percentage of cyanide relative to body mass that is fatal.
A solder alloy is commonly used in making a permanent bond between metal workpieces. A solder alloy contains 74.0 g of lead (Pb) and 126 g of tin (Sn). Determine the percentage of Sn in the solder alloy and express it to the ones place.
What is the correct definition for precision?
In what way does quantum mechanics influence material science?