A general chemistry student found a chunk of metal in the basement of a friend’s house. To figure out what it was, she used the ideas just developed in class about density. She measured the mass of the metal to be 114 grams. Then she dropped the metal into a measuring cup and found that it displaced 15.7 mL of water. Calculate the density of the metal.  You must show your work and units by using the equation editor() in the toolbar. (Click on the 3 vertical dots to expand the toolbar).  Within the equation editor, use  for the density equation.  Or, show your work (and units) on a separate sheet of paper. Immediately after submitting your exam, upload a picture of your work into the Unit 1 Exam Pictures dropbox. Be sure to number your problems and circle your final answer. 

How many neutrons does the phosphorus isotope,  contain?

How many neutrons does the isotope of cobalt,  have?

Determine the molecular weight for K3PO4.

When two colorless liquids are mixed together the solution turns blue.  This change is most likely 

How many significant figures are in the number 0.00100420?

Which response includes all of the following that are examples of homogeneous matter, and none that are examples of heterogeneous matter? a.  a pure gold chain b.  mouthwash c.  Italian salad dressing (oil and water) d.  chunky peanut butter e.  a chocolate chip cookie

After the age of 65, the recommended daily intake of calcium is 1500 mg. If a person takes in 1125 mg/day, what percent of the recommended daily intake is the person receiving?

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

Use whichever of the following conversions necessary to convert 353 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