Question 9.7: The topical antibiotic ointment Neosporin is 3.5% (m/m) neom...
The topical antibiotic ointment Neosporin is 3.5% (m/m) neomycin solution. How many grams of neomycin are in a tube containing 64 g of ointment?
STEP 1 State the given and needed quantities.
| ANALYZE THE PROBLEM | Given | Need | Connect |
| 64 g of 3.5% (m/m) neomycin solution | grams of neomycin | mass percent factor
\frac{g of solute }{100. g of solution} |
STEP 2 Write a plan to calculate the mass.
grams of ointment \boxed{ (m/m) factor} → grams of neomycinSTEP 3 Write equalities and conversion factors. The mass percent (m/m) indicates the grams of a solute in every 100. g of a solution. The mass percent (3.5% m/m) can be written as two conversion factors.
\begin{array}{r c}\boxed{\begin{matrix} 3.5 g of neomycin = 100. g of ointment \\\frac{ 3.5 g neomycin}{100. g ointment} \text{ and } \frac{100. g ointment}{ 3.5 g neomycin} \end{matrix}} \end{array}STEP 4 Set up the problem to calculate the mass.
\underset{Two SFs }{64 \cancel{g ointment}} \times \overset{Two SFs}{\underset{Exact }{\boxed{\frac{3.5 g neomycin}{100. \cancel{g ointment}} }}}= \underset{Two Sfs }{2.2 g of neomycin}Related Answered Questions
Question: 9.17
Verified Answer:
a. A 5% (m/v) glucose solution is isotonic. A red...
Question: 9.16
Verified Answer:
STEP 1 State the given and needed quantities.
...
Question: 9.15
Verified Answer:
STEP 1 Prepare a table of the concentrations and...
Question: 9.14
Verified Answer:
STEP 1 Prepare a table of the concentrations and...
Question: 9.13
Verified Answer:
STEP 1 State the given and needed quantities.
...
Question: 9.5
Verified Answer:
STEP 1 Write the ions of the reactants.
Reactant...
Question: 9.12
Verified Answer:
STEP 1 State the given and needed quantities.
...
Question: 9.11
Verified Answer:
STEP 1 State the given and needed quantities.
...
Question: 9.10
Verified Answer:
STEP 1 State the given and needed quantities.
...
Question: 9.9
Verified Answer:
STEP 1 State the given and needed quantities.
...