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melomori [17]
3 years ago
6

You add a solid sample into a liquid in a beaker. After stirring, the solid completely disappears in the liquid and looks clear,

like the image below. How would
you classify this type of matter?
A.) Heterogeneous Mixture
B.) Compound
C.) Homogeneous Mixture
D.) Element

Chemistry
1 answer:
Liula [17]3 years ago
7 0

Answer:

Homogenous mixture

Explanation:

Homo means same so the mixture looks the same all around.

Hetero means different and you would be able to see what's in it

Element is a pure substance that can't be broken down into simpler parts.

Compound is a bonded mixture of elements.

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Which of the following reactions is incorrectly labeled?
mars1129 [50]

<u>Answer:</u>

<em>The option a termed as precipitation reaction is incorrectly labelled. </em>

<u>Explanation:</u>

The chemical reactions are classified based on the reactants used and products formed in a reaction. They are decomposition reaction, single displacement reaction, double displacement reaction, acid-base neutralisation reaction, precipitation reaction, combustion reaction, redox reaction and organic reaction.

Among these, the given options are labelled as precipitation and combustion reaction. The one which is labelled as combustion reaction is correct because combustion reactions occur in the presence of oxygen only and the products of combustion reaction should include water, oxygen or carbon and heat.

The other option which is labelled as precipitation reaction is incorrect because precipitation reaction occurs when an ionic substance will come out of a solution due to heating it or stirring it making the solubility of the ionic substance in a solution zero such that it will come out as solid and form a layer at the bottom of the solution.

But in this case all the products are in aqueous state, there is absence of any ionic substance in solid state, so the option which is labelled as precipitation reaction is incorrectly labelled.

3 0
3 years ago
Is silver malleable because the valence electrons are strongly attracted to the nucleus
Mkey [24]
I’m gonna be honest I’m just answering So I could upload my question
8 0
4 years ago
Characteristics of the water at the mountain source: Speed: Temperature Oxygen Level Nutrient Level
aksik [14]

Describe the characteristics of the water at the mountain source:

Answer:

The answer is below

Explanation:

Speed: there will be faster speed due to the steep slope movement of water from the mountain.

Temperature: there will be lower temperatures as a result of the faster speed of water movement which reduces the influence of solar radiation on it.

Oxygen: the oxygen content is higher due to little or no residue particles present in it.

Nutrient Level: this is considered somewhat low as a result of the water coldness and speed which does not support the nutrition base to form.

6 0
3 years ago
Which change in the state of matter is thermal energy released ​
ycow [4]

Answer:

Condensation

Explanation:

Thermal energy is released in this process

3 0
3 years ago
Read 2 more answers
A) Calculate the pH of a 1.8 * 10 -4 M HCl solution
Sergio [31]

Answer:-

A) 3.745

B) 2 x 10^-13 M [H+]

pOH = 1.3

Explanation:-

A) From the question we see

The strength of HCl solution = 1.8 x 10^-4 M.

The M stands for molarity which is moles / Litre.

HCl is a monobasic acid. So the number of moles of Hydrogen ion H+ HCl can give is the same as the value of it’s strength in moles per litre.

The hydrogen ion concentration [H+] is therefore 1.8 x 10^-4.

The formula for pH is

pH = - log [ H+ ]

= - log [1.8 x 10^-4]

= 3.745

B) From the question we see

The strength of KOH = 0.05 M

The M stands for molarity which is moles / Litre.

KOH is a monoacidic base. So the number of moles of Hydroxyl ion OH- KOH can give is the same as the value of it’s strength in moles per litre.

The Hydroxyl ion concentration [OH-] is therefore 0.05

The relation between [OH-] and [H+] is

[H+] x [ OH-] = 10^-14

[H+] = 10^-14 / [OH-]

= 10^-14/ 0.05

= 2 x 10^-13 M

Using the relation between pH and [OH-]

pOH = - log [OH-]

= -log [0.05]

= 1.3

7 0
3 years ago
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