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    

You must use the factor-unit method to solve the following problem.  Show your work (conversion factors and units) by using the equation editor() in the toolbar.  Within the equation editor, use  for conversion factors.  Or, show your work (conversion factors 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.  A copy of your chemistry textbook is found to have a mass of 2.56×103 g.  What is this copy of your chemistry textbook is in kg? (1000 g = 1 kg)  

What is the mass number of an atom that contains 26 protons, 29 neutrons, and 26 electrons? What is the symbol for the element?

Classify the following as either a pure substance, a homogeneous mixture or a heterogeneous mixture: baking soda, NaHCO3