JohnS
Moderator
Last Activity: Today, 03:35 PM
Joined: 12-20-2007
Location: SE Michigan, USA
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I'm pretty sure you really mean 500 mL of saline, which is sodium chloride and water. Anyway 270 mg/500 mg = 0.54 mg/mL. That assumes the medicine doesn't... -
You need to know the average molecular weight of the mixture, which is also the molar mass, You also need the molar mass of each species.
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You have 6 cubic feet of concrete. Density varies a bit with mix, but figures of 144-150 lb/ft³ are commonly used. The reinforcing rods would make it...Leave a comment:
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The deciliter/liter conversion is easy; you just have to understand the prefixes of the metric system. Deci- literally means 1/10. 10 x 1/10 = 1
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Molar mass of selenium is 78.96 g/mol.
1.5 µmol/L x 1 L/10 dL x 78.96 g/mol = 11.8 µg/dL...Last edited by JohnS; 10-17-2018, 03:36 AM.Leave a comment:
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