- 19. Approximations deutlich
Which approximation has more than 10% error? (On exams you will always be provided with precise
values for constants and unit conversions)
a) Avogadro's number is about 1024
b) Water has a molar mass of about 20 g/mole
c) The speed of light is 3 x 108 m/s
d) The gas law constant is 8 J/mole K

Janel’s class studied properties of matter and how matter can change. janel decided she would do an experiment mixing baking soda and vinegar.question: describe the properties of baking soda and vinegar, and explain the changes that janel should see when she mixes the two types of matter. •first, identify the physical state of matter of baking soda. describe another property of baking soda. •next, identify the physical state of matter of vinegar. describe another property of vinegar. •then, explain what janel should see when she mixes the baking soda and vinegar. •describe the states of matter of the new materials that are formed. •explain how janel can be certain a change has occurred. me

Iwll give extra points to who gets this for ! what type of reaction is this? ?

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?