Asked by ayokabakare

# 1 Convert 8.900 x 10-8 meters (m) to nanometers (nm) and express...

1 Convert 8.900 x 10-8 meters (m) to nanometers (nm) and express the answer in scientific notation using the correct number of sig. figs.

2. A penny is found to have a mass of 2.61 grams. Using dimensional analysis, show what the mass of this penny is in kilograms. Express the answer in standard notation using the correct number of sig. figs.

3. A penny is found to have a mass of 2.61 grams. Using dimensional analysis, show what the mass of this penny is in pounds. Express the answer in standard notation using the correct number of sig. fig

4 A barometer is filled with a cylindrical column of mercury that is 76.0 cm high and 1.000 cm in diameter. If the density of mercury is 13.53 g/cm3 , what is the mass of mercury in the column? (Volume =pi r2 h). Express the answer in standard notation using the correct number of sig. figs.

5 Which of the following atoms contains the fewest protons? (hint: periodic table). a. 232Th b. 231Pa c. 245Pu d. 238U e. 232Pa

6 Rubidium has two naturally occurring isotopes. The average mass of Rb is 85.4678 u. If 72.15% of Rb is Rb-85 (84.9117 u), what is the mass of the other isotope?

7. Circle the incorrect formula below: a. AlPO4; b. KClO3; c. CaS; d. Na(NO3)2; e. Na2SO4

8. If you have 168 grams of C6H12O6 (glucose), how many moles of glucose do you have? How many molecules of glucose do you have? How many hydrogen atoms do you have?

Answered by mercenary

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