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3 years ago

Which of the following is a heterogeneous mixture? [1] Cola [2] Brass Air Coffee with sugar stirred in [5] [3] Soil

Chemistry

1 answer:

Readme [11.4K]3 years ago

4 0

Answer:

Soil is heterogeneous mixture of sand particles of different sizes, shape and of different compositions.

Explanation:

Homogeneous mixtures are defined as the mixtures in which components are evenly spread throughout the solution. The size and shape of the particles are similar in these mixtures.

For example : alloys, salt solution.

Heterogeneous mixtures are defined as the mixtures in which component are unevenly spread throughout the solution. The size and shape of the particles differ in these mixtures.

For example : sand in a water, soil etc.

Brass is an alloy homogeneous mixture of metals.

Air is a homogeneous mixture of gases.

Coffee with sugar stirred in is also homogeneous mixture.

Soil is a heterogeneous mixture of sand particles of different sizes, shape and of different compositions.

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Data:
Molar Mass of NaOH = 40 g/mol

Solving: <span>According to the Law Avogradro, we have in 1 mole of a substance, 6.02x10²³ atoms/mol or molecules
</span>
1 mol -------------------- 6.02*10²³ molecules
y mol -------------------- 2.70*10²² molecules

6.02*10²³y = 0.270*10²³
$y = \frac{0.270*\diagup\!\!\!\!\!\!10^{\diagup\!\!\!\!\!\!23}}{6.02*\diagup\!\!\!\!\!\!10^{\diagup\!\!\!\!\!\!23}}$
$\boxed{y \approx 0.04\:mol}$

Solving: <span>Find the mass value now
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40 g ----------------- 1 mol of NaOH
x g ------------- 0.04 mol of NaOH

$x = 40*0.04$
$\boxed{\boxed{x = 1.6\:g}}\end{array}}\qquad\quad\checkmark$

Answer:
The mass is 1.6 grams

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Explanation:

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From the given question;

Fischer projection for an enantiomer of 2-bromo-2,3-dihydroxypropanal with the bromine oriented horizontally to the left and the hydroxide group oriented horizontally to the right.

we can sketch the way the enantiomer of 2-bromo-2,3-dihydroxypropanal can be seen like the one shown below:

CH₂OH

Br -------------|----------------OH

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