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kolbaska11 [484]
3 years ago
6

Compounds and mixtures are both types of substances that contain different types of atoms. Alena is given a sample of material t

hat she knows contains both Calcium and Iodine atoms. How will Alena be able to determine if this material is a compound or a mixture?
pls hurry!
Chemistry
1 answer:
photoshop1234 [79]3 years ago
7 0
If she can easily separate the calcium and iodine, it’s a mixture. If she can’t easily separate the two by physical means (like putting it through a filter) it’s a compound.
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A solution was prepared by mixing 50.0 g
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Answer:

4.78 %.

Explanation:

<em>mass percent is the ratio of the mass of the solute to the mass of the solution multiplied by 100.</em>

<em></em>

<em>mass % = (mass of solute/mass of solution) x 100.</em>

<em></em>

mass of MgSO₄ = 50.0 g,

mass of water = d.V = (0.997 g/mL)(1000.0 mL) = 997.0 g.

mass of the solution = mass of water + mass of MgSO₄ = 997.0 g + 50.0 g = 1047.0 g.

<em>∴ mass % = (mass of solute/mass of solution) x 100</em> = (50.0 g/1047.0 g) x 100 = <em>4.776 % ≅ 4.78 %.</em>

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"One has more oxygen atoms than the other" best distinguishes carbon dioxide from carbon monoxide

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