How many formula units of sodium nitrate are present in 33.9 g of the substance?

In chemistry, the mole is a fundamental (SI) unit used to measure the amount of substance. This quantity is sometimes referred to as the chemical amount. Sodium nitrate (NaNO3), historically known as Chile saltpeter, is the primary oxidizing agent in aqua regia. 

  • Convert the given mass to moles of NaNO3 using its molar mass. (1 mole of NaNO3 = grams of its molecular weight)
  • Using the mole concept again we know that 1 mole of the ionic substance = 6.02 x 1023 formula units; This will give you formula units of sodium nitrate are present in 33.9 g of the substance

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