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guajiro [1.7K]
3 years ago
8

The following characteristics describe which of these? This substance is not uniform in appearance and each part of the mixture

contains a combination of different ingredients in different ratios
A. Homogeneous mixture
B. Heterogeneous mixture
C. Pure substance
D. Solution
Chemistry
1 answer:
natka813 [3]3 years ago
5 0
<span> Heterogeneous mixture because the components are not or can't be mixed uniformly..


Ex : Oil in water  or Sand in water </span>
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A student wants to prepare 1.00 L of a 1.00 M solution of NaOH (molar mass 40.00 g/mol). If solid NaOH is available, how would t
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Explanation:

1)

Molarity=\frac{\text{Mass of substance}}{\text{Molar mass of substance}\times \text{Volume of solution(L)}}

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A student can prepare the solution by dissolving the 40. grams of NaOH in is small volume of water and making that whole volume of solution to volume of 1 L.

Upto two significant figures mass should be determined.

2)

M_1V_1=M_2V_2 (dilution equation)

Molarity of the NaOH solution = M_1=2.00 M

Volume of the solution = V_1=?

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Volume of NaOH solution after dilution= V_2=1 L

M_1V_1=M_2V_2

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A student can prepare NaOH solution of 1.00 M by diluting the 0.500 L of 2.00 M solution of NaOH with water to 1.00 L volume.

Upto three significant figures volume should be determined.

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