GOB Chemistry
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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 quantity of 0.20 g of cyanide per body mass of 7.0×104 g is fatal if administered to a person. Determine the percentage of cyanide that is fatal.
A bottle contains 500.0 grams of toilet cleaner. The label of the toilet cleaner states that the sodium hypochlorite (NaOCl) content is 25.00 grams. Determine the percentage of NaOCl in the toilet cleaner. Express this percentage to the ones place.
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.
Shown below is a strip of paper measured by a ruler. Convert the measurement in centimeters to inches and compare the calculated value to the measurement in inches from the ruler. Explain the discrepancies between the values.
What is the correct definition for precision?
The mass of a product from the same chemical reaction has a known weight of 5.20 g. Three groups measured the product. The recorded values are 5.70 g, 5.72 g, and, 5.74 g. The values of the group are ____.
Three students measured an object that has a known length of 12.49350 cm. Identify the student with the most accurate measurement