Look at screen shot.

Answer:

It is melting chocolate and freezing water.

Explanation:

If your melting melting chocolate it would turn into a liquid and if you freeze

water then you are turning liquid to a solid.

Melting chocolate and freezing water are the examples of phase change.

A phase change is a change in the states of matter. For example, a solid may become a liquid. This phase change is called melting. When a solid changes into a gas, it is called sublimation.

A phase transition is the physical process of transition between one state of a medium and another. Commonly the term is used to refer to changes among the basic states of matter: solid, liquid, and gas.

There are eight thermal processes through which matter can attain phase change. They are melting, freezing, evaporation, condensation, sublimation, deposition, ionization, and recombination.

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Explanation:

Answer:

The nucleus is a collection of particles called protons, which are positively charged, and neutrons, which are electrically neutral. Protons and neutrons are in turn made up of particles called quarks. The chemical element of an atom is determined by the number of protons, or the atomic number, Z, of the nucleus.

Answer:

Away from the sun

Explanation:

winter

In the Northern Hemisphere, winter generally begins on December 21 or 22. This is the winter solstice, the day of the year with the shortest period of daylight. Summer begins on June 20 or 21, the summer solstice, which has the most daylight of any day in the year.

Answer:

Metals consist of giant structures of atoms arranged in a regular pattern. The electrons from the outer shells of the metal atoms are delocalised , and are free to move through the whole structure. This sharing of delocalised electrons results in strong metallic bonding .

Explanation:

mark me as brainliest

Answer:

Because the total energy of the enzyme has been used up and actions already complete

Explanation:

Catalyst are substance known to speed up rate of chemical reaction just like taking a short pathway. When velocity of catalyzed reaction reach maximum, at that moment reaction has reach it full potential (there is an equilibrium in reaction). there won't be any changes on further addition, and mostly indicate that Reaction is Complete

Answer:Unlike those in a suspension, particles in a colloid do not separate when sitting still. The particles in a suspension may be separated by filtration unlike those in a colloid. Colloids are able to scatter light, but suspensions cannot transmit light

Answer:

3 mass instincts. If you look at the scale you can they evenly sometimes line up with a line. Whenever a huge instinct occurred the lines were really high, but whenever they were little instincts on the scale the lines would go down

Explanation:

Answer:

 80.0 g Na and 20.0 g N2.

Explanation:

This means the limiting reactant determines the maximum mass of the product formed.

Answer:

Meteorology is the science dealing with the atmosphere and its phenomena, including both weather and climate

Answer: Meteorology I believe

Explanation:

Answer:

Limiting reactant= SO₂, Theoretical yield = 9.6g SO₃

Explanation:

The first step is is to find the limiting reactant; you do this using stoichiometry.

The reactant that produces the smallest amount of sulfur trioxide SO₃, is the limiting reactant.

In this problem, SO₂ is the limiting reactant.

Now to find the theoretical yield we will use the smallest value of SO₃.

I have uploaded a picture to better illustrate the problem and hope it helps.

Answer:

The number of valence electrons of an element can be determined by the periodic table group (vertical column) in which the element is categorized.

Explanation:

Hope it helps!

Answer:

24

Explanation:

The average size of most ponds is 10′ x 15′ (roughly 150 square feet) with the deepest point being 24″. If you have underwater shelves for plants they usually go 12″ down.

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Answer:

I'll do it if you give brainlyest and some points

Answer:

1k km

Explanation:

Answer:

p=m/v

p equals density M equals mass and v = volume

Answer:

d

Explanation:

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To identify the gas produced in a chemical reaction without observing the atoms and molecules directly through the characteristics of the gas.

Chemical reaction is defined as the process by which substances (known as reactants) combine together with the formation of bonds to form products.

There are some signs that shows that chemical reaction has occurred. They include:

Therefore, the production of gas from a chemical reaction shows that a reaction has occurred.

These gases can be identified without observing the molecules through that characteristics of the gas. This include:

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Answer:

A.

Explanation:

hope it helps

Answer:

im sorry the answer if i did i would

Explanation:

Answer:

Iron oxides form when oxygen, a product of photosynthesis, is in the atmosphere.

Answer:

you can find the answer in this link

https://www.coursehero.com/file/p4kfbhi5/B-Turn-on-Show-formula-What-is-the-formula-of-this-compound-Li2O-C-Turn-on-Show/

Answer: Surface tension has a more complicated effect on capillary pressure: on the one hand, capillary pressure is directly proportional to surface tension. High surface tension liquids, on the other hand, typically have higher contact angles, which lowers capillary pressure.

Explanation: Does this help??

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question

[tex]n = \frac{5.65 \times {10}^{26} }{6.02 \times {10}^{23} } \\ = 938.5382[/tex]

We have the final answer as

Hope this helps you

For the reaction of deprotonation of formic acid, the concentration of HCOO⁻ at equilibrium is 0.0151 M if the initial concentration of formic acid is 1.35 M.  

The reaction of deprotonation of formic acid is the following:

CHOOH + H₂O ⇄ HCOO⁻ + H₃O⁺

At the equilibrium we have:

CHOOH + H₂O ⇄ HCOO⁻ + H₃O⁺    (1)

1.35 - x                         x           x

The acid equilibrium constant for this reaction is:

[tex] K_{a} = \frac{[HCOO^{-}][H_{3}O^{+}]}{[CHOOH]} = 1.7 \cdot 10^{-4} [/tex]  (2)

Entering the values of [CHOOH] = 1.35-x, [HCOO⁻] = [H₃O⁺] = x, into equation (2) we have:

[tex] 1.7 \cdot 10^{-4} = \frac{[HCOO^{-}][H_{3}O^{+}]}{[CHOOH]} = \frac{x^{2}}{(1.35 - x)} [/tex]  

[tex]1.7 \cdot 10^{-4}(1.35 - x) - x^{2} = 0[/tex]

After solving the above quadratic equation and taking the positive value for x (concentrations cannot be negative), we have:

[tex] x = [HCOO^{-}] = [H_{3}O^{+}] = 0.0151 M [/tex]

Therefore, the concentration of HCOO⁻ at equilibrium is 0.0151 M.

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I hope it helps you!

The heat produced by hydrolysis of 65 kg of ATP is -6.8 kJ.

Let's consider the thermochemical equation for the hydrolysis of ATP.

ATP + H₂O ⇒ ADP + Pi   ΔG = -57 kJ/mol

We will convert 65 kg of ATP to moles using its molecular weight (507.18 g/mol).

[tex]65 \times 10^{3} g \times \frac{1mol}{507.18g} = 1.2 \times 10^{2} mol[/tex]

57 kJ of heat are released by the hydrolysis of 1 mole of ATP. The heat released by the hydrolysis of 1.2 × 10² moles of ATP is:

[tex]1.2 \times 10^{2} mol \times \frac{(-57kJ)}{1mol} = -6.8 \times 10^{3} J = -6.8 kJ[/tex]

-6.8 kJ is the heat produced by hydrolysis of 65 kg of ATP.

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Answer:

c

Explanation:

Answer:

B

Explanation:

Answer:

HOPE IT HELPS

Explanation:

PLS MARK BRAINLIEST ^_^

Answer:

Here you go dear..

Here's the structure of iron you were talking about earlier..

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Explanation:

Hope it helps you..

Your welcome in advance..

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Answer:

Filtration is the removal or filtering of the toxins and waste products from the blood by the kidney. They are excreted from the body through urine. In general, filtration refers to the passing of a liquid through a filter. In the human body, the kidney functions as a filter.

Explanation:

Answer:

Physical

Explanation:

Nothing has chemically happened and the change is permenant therefore it is physical