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Record the volume of liquid in the graduated cylinder to the correct number of significant digits. 

How many neutrons does the phosphorus isotope,  contain?

When the measurements 83.88 and 81.6 are multiplied together, the answer should have ___ significant figures?  

Classify the following as either a pure substance, a homogeneous mixture or a heterogeneous mixture: freshly squeezed mixture of orange juice

Classify the following as a chemical or physical property: Silver is a shiny metal that has a density of 10.5 g/mL.

Which of the following correctly classifies the substance, O3?

How many neutrons does the isotope of cobalt,  have?

After the age of 65, the recommended daily intake of calcium is 1500 mg. If a person takes in 1050 mg/day, what percent of the recommended daily intake is the person receiving?

How many atoms of hydrogen are in one molecule of Al(H2PO4)3?

How many significant figures are in the number 0.00100420?