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Classify the following as a physical or chemical change:  sweetening coffee with sugar

If necessary, use the Periodic Table below to answer the questions that follow. 

Use whichever of the following equations necessary to convert 383 K to Fahrenheit. (Use only these equations – decimal answers will not be accepted) °C = 5/9 (°F – 32) °F = 9/5 (°C) + 32 °C = K – 273  

The base unit for length in the metric system is the ____.

Which of the following correctly classifies the substance, CO2?

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.