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3 years ago

Which of the following is a heterogeneous mixture?

Chemistry

2 answers:

Contact [7]3 years ago

7 0

Answer: Option (c) is the correct answer.

Explanation:

A mixture whose components differ in proportion or simply whose constituent particles can be easily separated from each other is known as a heterogeneous mixture.

For example, a mixture of water and sand is a heterogeneous mixture as it's constituent particles vary in proportion.

Therefore, out of the given options a jar of mixed nuts is a heterogeneous mixture.

Softa [21]3 years ago

3 0

A heterogeneous mixture is a mixture that it's components can be easily seen and separated.

c. a jar of mixed nuts

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The state of matter in which molecules are attracted to each other but can change position is a

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i believe the answer is a liquid

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3 years ago

In this experiment we will be using a 0.05 M solution of HCl to determine the concentration of hydroxide (OH-) in a saturated so

gulaghasi [49]

Answer: The moles of hydroxide ions present in the sample is 0.0008 moles

Explanation:

To calculate the concentration of acid, we use the equation given by neutralization reaction:

$n_1M_1V_1=n_2M_2V_2$

where,

$n_1,M_1\text{ and }V_1$ are the n-factor, molarity and volume of acid which is HCl.

$n_2,M_2\text{ and }V_2$ are the n-factor, molarity and volume of base which is $Ca(OH)_2$

We are given:

$n_1=1\\M_1=0.05M\\V_1=16mL\\n_2=2\\M_2=?M\\V_2=36.0mL$

Putting values in above equation, we get:

$1\times 0.05\times 16=2\times M_2\times 36\\\\M_2=\frac{1\times 0.05\times 16}{2\times 36}=0.011M$

To calculate the moles of hydroxide ions, we use the equation used to calculate the molarity of solution:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}\times 1000}{\text{Volume of solution (in mL)}}$

Molarity of solution = 0.011 M

Volume of solution = 36.0 mL

Putting values in above equation, we get:

$0.011=\frac{\text{Moles of }Ca(OH)_2\times 1000}{36}\\\\\text{Moles of }Ca(OH)_2=\frac{0.011\times 36}{1000}=0.0004mol$

1 mole of calcium hydroxide produces 1 mole of calcium ions and 2 moles of hydroxide ions.

Moles of hydroxide ions = (0.0004 × 2) = 0.0008 moles

Hence, the moles of hydroxide ions present in the sample is 0.0008 moles

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3 years ago

Which is an example of a natural disaster limiting population growth?

fenix001 [56]

Answer:

A hurricane wiping out a new species of flower in the tropical rain forests of Brazil.

Explanation:

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3 years ago

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Why is creativity important in science?

nasty-shy [4]

Because you need to know how/ learn to try new things for (new experiments) and creativity will teach you different ways on how to do it.

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2 years ago

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5. An object is a regular, rectangular, solid with dimensions of 2 cm by 3cm by 2cm. It has a mass of 24 g. find its density.

m_a_m_a [10]

Answer:

Density, D = 2g/cm^3

Explanation:

Given the following data;

Length = 2cm

Width = 3cm

Height = 2cm

Mass = 24g

Density = ?

Volume of a rectangular solid (V) = Length × Weight × Height

Therefore, V = L× W × H

Substituting the values, we have;

$V = 2 *3 * 2 = 12$

V = 12cm

Density can be defined as the ratio of mass to volume i.e mass all over volume.

Mathematically, $Density = \frac{Mass}{Volume}$

$D = \frac{M}{V}$

Substituting the values, we have;

$D = \frac{24}{12}$

Density, D = 2g/cm^3

Hence, the density of the rectangular solid is 2g/cm^3.

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3 years ago