06/23/24

A store has 7 3/8 yd on one roll of fabric, and 10 3/4 yd on another roll. The store sells 4 pieces of fabric. Each piece sold is 4 5/8 yards long. How many yards of the fabric is left after the sale?
This deals with fundamentals of fractions, up to and including borrowing.
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06/22/24

What is 72% of 90
This question deals with using either multiplication, division, or "The Butterfly Method"
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05/01/24

A sample of nickel is to be determined using absorption spectrum analysis.

. A sample of nickel is to be determined using absorption spectrum analysis. A 0.286 g sample of nickel ore is crushed and digested in 1M HNO3. The stock solution is then diluted to 250.0 mL in a... more
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10/29/20

Assuming that the dissolved concentration of tetrachloroethylene (C2Cl4) in a lake is 0.25 ppb.
Assuming that the dissolved concentration of tetrachloroethylene (C2Cl4) in a lake is0.25 ppb. Given a Henry’s law constant (H) of 0.081, and a measured gas exchange coefficient of 2.6 x 10-3 cm/s... more
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10/29/20

Assuming that the total volume of contaminated soil is 35.3 cubic foot
Assuming that the total volume of contaminated soil is 35.3 cubic foot. Henry’s constant = 0.12, soil moisture content = 0.3 m3/m3, the sorption coefficient (K) = 2 cm3/g, the soil air content (the... more
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07/12/20

the fraction saturation of myoglobin at 30 mm Hg and 100 mM Hg, the partial pressure of O2 in venous and artery blood
PO2: YO2:0.5 0.1611 0.2772 0.4343 0.5354 0.6056 0.6978 0.75412 0.82120 0.885
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