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Ivahew [28]
4 years ago
9

Which of the following methods can be used to remove water from a mixture of sand and water? A. Centrifuge B. Filtration C. Floa

tation D. Magnetism
Chemistry
2 answers:
vlabodo [156]4 years ago
4 0

Filtration is correct


wlad13 [49]4 years ago
3 0
The correct answer is b. filtration
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If the absorbance of a KMnO4 solution of unknown concentration is 0.633, calculate the concentration of KMnO4 in the solution.
solong [7]

The molar Concentration of KMnO₄ is 0.000219 M

Concentration is the abundance of a constituent divided by means of the overall extent of an aggregate. numerous styles of mathematical description may be outstanding: mass awareness, molar awareness, variety concentration, and quantity awareness.

y is absorbance

x is the molar concentration of KMnO_4

y = 4.84E + 03x - 2.26E - 01

0.833 = 4.84 * 10⁺⁰³ x - 2.26 * 10⁻¹

1.059 = 4.84 * 10⁺⁰³ x

X = 0.000219 M

Hence, The molar Concentration of KMnO₄ is 0.000219 M

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When 3.0 mol Al react with 7.0 mol HCl, what is the limiting reactant and how many moles of H2 can be formed?
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HCl is the limiting reactant, and 3.5 mol H2<span> can be formed</span>
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Sonia was experimenting with electric charges. She tied two inflated balloons together, held them next to each other, and rubbed
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Sonia observed that the two balloons repelled each other. This is because both balloons acquired the same charge when she rubbed them with the piece of wool, and like charges repel each other.
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