Procaine hydrochloride ( = 272.77 g/mol) is used as a local anesthetic. Calculate the molarity of a 4.666 m solution which has a density of 1.1066 g/ml.
molarity = Moles of solute / volume of solution
Molarity = m d / [ 1 + (mW / 1000)]
Molarity = 4.666 X 1.1066 / [ 1 + (4.666 X 272.77 / 1000)]
Molarity = 5.16 / 2.272= 2.271 M
<span>A complete selection of high-quality, affordable nitrogen cylinders in aluminum and steel. Nitrogen cylinders are also perfect for beer mix.</span>
Answer:
Explanation:
Step 1. Assign oxidation numbers to all
elements
PbS(s) + O2
(g) PbO(s) + SO2
(g)
• Step 2. Identify oxidized and reduced species
– PbS was oxidized (O.N. of S: -2 -> +4)
– O2 was reduced (O.N. of O: 0 -> -2)
• Step 3. Compute e-
lost and e- gained
– In the oxidation: 6e- were lost from S
– In the reduction: 2e- were gained by each O
Answer:
is considered a chronic disease