8. When using the scientific notation system to express large numbers, move the until digit(s) remain(s) to the left, then indicate the number of moves of the decimal point as the

9. When a measurement is recorded, it includes the
are certain plus one uncertain digit.
a. Major figures
b. Significant figures
c. Relative figures
d. Relevant figures
10.The is based on the lowest theoretical temperature, called
a Kelvin scale, absolute zero
b. Celsius scale, absolute zero
c. Kelvin scale, boiling point of water
d. Centigrade scale, freezing point of water

8. When using the scientific notation system to express large numbers, move the decimal until one digit(s) remain(s) to the left, then indicate the number of moves of the decimal point as the power of 10.

9. b. Significant figures.

When significant figures are used, the digits are certain plus one uncertain digit.

10. a Kelvin scale, absolute zero.

The Kelvin scale runs to absolute zero which is the lowest theoretical temperature. This measures 0 Kelvins on the Kelvin scale and −273.15°C on the Celsius scale.

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.