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Varvara68 [4.7K]
3 years ago
14

Who.

Chemistry
2 answers:
noname [10]3 years ago
8 0

Answer:

metalloids

Explanation:

I took the text and got it right, Good Luck!

Maksim231197 [3]3 years ago
8 0

Answer:

Metals if you dont beleive me here is a picture to prove it

Explanation:

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First, get about 20 mL of the quinine stock solution in a clean beaker to prepare 250 mL of about 2 ppm quinine in 0.05 M H2SO4.
iris [78.8K]

Answer:

Volume of acid, Va=250mL; Volume of quinine,Vb=20mL; Molarity of acid, Ma=0.05M.

Molar mass of acid= H2+S+O4= 2+32+(16X4)= 2+32+64=98g

Concentration of acid, Ca= Molar mass of acid/ Ma =98/0.05=1960g/mol

Explanation: To calculate concentration of quinine, Cb is as follow

Va*Ca=Vb*Cb

∴ Cb=Va*Ca/Vb =250*1960/20 =24500g/mol

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