Chapter 2 Knewton Exam Questions With Verified Answers.

Chapter 2 Knewton Exam Questions With Verified Answers. A tiny gas bubble in a carbonated beverage contains 2.69 x 102 carbon dioxide molecules. Write the number of molecules in standard notation. - answer2,690,000,000,000 For a number written in scientific notation, 1.02 x 10-', what does the exponent represent? - answerthe power of ten the digit term is multiplied by The wavelength of yellow light is approximately 0. m. Convert this quantity from meters to nanometers. - answer5.80 x 102 nm In the process of vision, the light-sensitive pigment rhodopsin undergoes cis-trans isomerism in response to light in about 2 x 10-10 ms. How many seconds is this? Write the answer in scientific notation. - answer2 x 10^-13 s Saltwater covers approximately 361,900,000 square kilometers of the earth's surface. Write the number of square kilometers of saltwater in scientific notation. - answer3.619 × 108 square kilometers A meteorite was found to weigh 63,500 grams. How many kilograms is this? - answer63.5 kg A light-year is a measure of distance rather than time; it is the distance that a ray of light will travel in a year in a vacuum. The distance between the earth and the sun is approximately 0.0000158 light-years. Write this number in scientific notation. - answer1.58 x 10-5 light- years Scientific notation is used to express very large and very small numbers using. - answerpowers of 10 Non-zero digits are: - answeralways significant When dealing with significant figures, the rules for adding values are the same as the rules for: - answersubtracting values One of the basic rules for significant figures is: - answerAll zeroes between significant digits are significant.