Quiz 1

• Properties that can be studied by your senses are physical properties
• Physical properties include colour, odour, melting point, boiling point, density
• properties That you need to know what chemicals are in them are called chemical properties.
• Intensive properties are independent of the amount of matter
• Extensive properties are dependent on the amount of matter
• Physical changes are irreversible/reversible but do not change the chemical composition of the substance
• Chemical changes are irreversible/reversible and the molecular composition of matter changes
• kg


  Kilogram
• Km


  kilometer
• G


  Gram
• Mm


  Millimeter
• dL


  Deciliter
• Dg


  Dekagram
• cg

  Centigram
• Hg


  hectogram
• How many sig figs? 56783.08


  7
• 1. Perform the following addition and report the result with the correct number of significant figures: 0.002345+0.0009876+0.001230.

  0.004563
• D = ?/?

  D = m/v
• For addition and subtraction, the final answer's period will be in the same place as the number with the least # of sig figs.
• For multiplication and division, the final answer will have the same # of sig figs as the # with the least sig figs.
• F= 1.8x °c +32
• K= °c + 273.15
• Accuracy is the closeness of a measured value to the true value
• Precision is a measure of the reproducibility or repeating nature of a set of measurements