Contraction is the answer
It is b . Because three of them are less than 90.
Answer:
Molecular mass or vapor density
Explanation:
The empirical formula is the simplest formula of a compound. The molecular formula expresses the exact formula of the compound. To derive the molecular formula, we need information about its molecular mass or if given the vapor density.
(Empirical Formula)n = Molecular formula ------(i)
n = number of repeating units of the empirical formula present in one mole of the molecule
also, (molar mass of empirical formula)n = molar mass of compound
From here, we can find n and insert in (i) above.
Recalled food should be separated from food being served until they are effectively disposed.
Recall food refers to those food that are declare harmful by the producers and for which the producers are making efforts to remove them from the market. Sch food should be separated from other food and kept in a separate place until notification is received from the vendor about how to dispose such food.