No. of moles -= given mass/ molar mass
1) 9 g of H2O = 9/18 = 1/2 = 0.5 mole
2) 88g of CO2 = 88/44 = 2moles
3) 1.7 g of NH3 = 1.7/17 = 0.1 mole
The words aa q.s. is an abbreviation which is used in
pharmacy. This is usually written by prescribers and then translated by
pharmacists. The aa is derived from Latin which means “of each” while q.s. is
also derived from Latin which means “a sufficient quantity”. This simply means
that there is equal amount of Hytone 1% cream and Lotrimin 1% cream in the
total cream formulation.
Since we are to make a total of 60 g of cream, therefore
50% of it would be Lotrimin cream.
Amount of Lotrimin cream needed = 0.5 (60 g)
<span>Amount of Lotrimin cream needed = 30 grams</span>
Answer: The concentration of the reactants and products remain constant!
Explanation: <em>remember that </em><em>a dynamic equilibrium is a state of balance in which the rates of the forward and reverse reactions are equal,</em><em> and they continue to occur at an equivalent and constant rate with the same amount of product and reactants!</em>
Oxygen is fairly smaller than beryllium. The two have the same amount of orbital shells, but oxygen has more protons, which pulls its electrons closer together, thus decreasing the overall size.
