Using conversion factors, solve the following clinical problem 5.5oz of a steroi

Question

Using conversion factors, solve the following clinical problem 5.5oz of a steroid ointment is required . If there are 16 oz in 1lb,how many grams of ointment does the pharmacist need to prepare? Given: 1lb=454g what is the density(g/ml)of the following sample: A gem has amass of 0.201 lb. when the gem is placed in graduated cylinder containing 20.0ml of water level rises to 44.5 ml. given 1lb=454g There are four isotopes of strontium with mass numbers 84.86.87.88 Write the atomic symbol for each of the atoms How are these isotopes alike? how are they different? Why It the atomic mass of strontium listed on the period table not a whole number? Which isotope is the most abundant in a sample of strontium?

Explanation / Answer

36 a) we want 5.5 ounces/16ounces/pound = 0.34375 pounds

0.34375 pounds* 454 g/pound = 156 g

so prepare 156 g

36b) 0.201lb *454 g/lb = 91.254 g

the space it takes up is 44.5ml - 20ml = 24.5 ml

so the mass per volume is 91.254g/24.5ml = 3.72 g/ml

37)

1)84Sr , 86Sr , 87Sr , and 88Sr

2 each has the same number of protos and the same number of electrons

3 each has different numbers of neutrons

4 the listed number is a weighted average of all the isotopes

5 88Sr (82.58%). No way to knfigure this out without looking it up

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