Part A:   21 ∘C Express your answer to one decimal place.     Part B 165 ∘C Express your answer to three significant figures.   Part C -45 ∘F Express your answer to two significant figures.       Part D 216 K Express your answer to two significant figures.

What is the importance of significant figures?

An electric current of 52.0 mA flows for 6,0 seconds. Calculate the amount of electric charge transported. Be sure your answer has the correct unit symbol and 2 significant digits. 0 x10 0.0 X 00 S

m means meter. TV waves travel at the speed of light (“c”), roughly 3.00 x 108 m/s. How long does it take for a Tv message to reach the edge of our solar system, roughly 9.0×109 miles from Earth? Use proper significant figures. One mile= 1.609 km.

A 76.00 pound flask of mercury costs $128.50. The density of mercury is 13.534 g/cm^3. Find the price of one cubic inch of mercury by calculating intermediate values. What is the price of one pound of mercury?

An electric current of 481.0 mA transports 530. uC of charge. Calculate the time this took. Be sure your answer has the correct unit symbol and 3 significant digits. 0 x10 X H 8 S

If a sample of gold alloy has a mass of 87.7 g and is 78.3% gold by mass, what percentage of the alloy is made up of other metals? Write your answer to the nearest tenth of a percent. (I had to alter the wording of this question since it wasn't calculating significant figures properly, so if you got it wrong because of significant figures you can assume you probably actually got it correct.)

Calculate the volume (I x w x H ) of this cube to the correct number of digits. Block of wood Height = 1 cm Width = 1.0 cm Length = 1.2 cm 1 cm3 1.2 cm3 1.0 cm3 1.20 cm3

Calculate the density of the liquid. Round your answer to  3  significant digits. ⋅gmL−1     Given the data above, is it possible to identify the liquid?   yes     no       If it is possible to identify the liquid, do so.   glycerol     dimethyl sulfoxide     diethylamine     methyl acetate     ethanolamine

In chemistry, angstrom (Å) is a commonly used unit, and 1 Å = 10-10 m. Another commonly used unit is a nanometer (nm), and 1 nm = 10-⁹ m. The relation between Å and nm is: 1 Å= 0.1 nm 1 Å= 1 Å = 10-1⁹ nm 1 Å= 10¹⁹ nm = 10 nm