How many grams are in 3.45 × 1022 formula units of NaNO3?

4.87 g

Explanation:

Step 1: Calculate the moles of sodium nitrate

Considering the Avogadro's number, in 1 mole of sodium nitrate there are 6.02 × 10²³ formula units of sodium nitrate. We will use this ratio to find the moles corresponding to 3.45 × 10²² formula units.

Step 2: Calculate the mass corresponding to 0.0573 moles of sodium nitrate

The molar mass of sodium nitrate is 84.99 g/mol. The mass corresponding to 0.0573 moles is:

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in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.