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You are stirring a bowl of hot soup with a metal spoon. The spoon starts to feel warmer, this represents conduction.

One of the three primary methods for the transfer of heat energy is conduction. Radiation and convection are the other two methods through which heat is transferred. Heat energy is transferred through the mechanism of conduction when nearby atoms or molecules collide.

In liquids and solids where particles are more closely spaced, conduction happens more easily than in gases, wherein particles are more widely spaced. When there is a significant temperature differential between both the substances that are in contact, the rate of energy transfer through conduction is increased.  You are stirring a bowl of hot soup with a metal spoon. The spoon starts to feel warmer, this represents conduction.

Therefore, the correct option is option A.

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From the options, the reaction that shows the conservation of atoms is 4Fe + 302 → 2Fe2O3.

The idea of the conservation of atoms is that the number of atoms on the right hand side is equal to the number of atoms on the left hand side.

In this case, we have to a reaction equation which is balanced which is 4Fe + 302 → 2Fe2O3.

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Answer:

Option D

Explanation:

analyzing cells is something I'm doing in science class right now!

Hope this helped, have a nice day! :)

Answer:

Science and technology are different, yet related, fields of study. Which action is best classified as science?

Explanation:

Answer:

2Na2O2 + 2H2O → 4NaOH + O2 is the balanced ver of Na2O2 + H2O - NaOH + O2

Explanation:

Answer:

A compound is a substance in which the atoms of two or more elements are chemically combined in a fixed proportion.

Explanation:

The correct answer is that a compound is a substance in which the atoms of two or more elements are chemically combined in a fixed proportion.

A compound is a substance composed of two or more kinds of atoms joined together in a definite grouping.

The properties of a compound are distinct and different from those of the individual elements that are combined in its make - up.

There are several millions of compounds known.

An element is a distinct substance that cannot be split-up into simpler substances. They are made up of only one kind of atom.

Answer:

energy from glucose

Explanation:

Answer:

natural gas plant liquids

Explanation:

The ingredients that are important for the production of plastics are natural gas and plant liquids. The correct options are c and d.

Polymers are the primary component of a wide variety of synthetic or semisynthetic materials known as plastics. Due to their versatility and importance to civilization, plastics are a very important material. This is due to the fact that plastics can be bent and molded into a variety of objects, from plates to phones.

Radiation is to blame for this becoming possible. People who manufacture plastics can heat polymers sufficiently to allow them to bend by employing radiation. They can then be formed into a variety of things when this occurs.

Plastics are made from natural gases and liquids obtained from plants.

Therefore, the correct options are c, natural gas, and d, plant liquids.

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Given :

Volume of NaCl solution 2.5 L .

Molarity of NaCl solution is 0.070 M .

To Find :

How many moles are present in the solution.

Solution :

Let, n be the number of moles.

We know, molarity is given by :

[tex]M = \dfrac{n}{V(in\ L)}[/tex]

So,

[tex]n = M \times V\\\\n = 0.070\times 2.5 \\\\n = 0.175\ moles[/tex]

Therefore, number of moles of NaCl is 0.175 moles.

Answer:

A person with a "low" (or slow) metabolism will burn fewer calories at rest and during activity and therefore has to eat less to avoid becoming overweight.

meaning of normal metabolism-Metabolism is the process by which your body converts what you eat and drink into energy. Even when you're at rest, your body needs energy for functions such as breathing, circulating blood and repairing cells. The energy your body uses for these basic functions is known as your basal metabolic rate.

A person with a low metabolism will burn fewer calories at rest and during activity and therefore has to eat less to avoid becoming overweight.

Signs of a slow metabolism

-You have gas.

-You crave sugar.

-You keep gaining weight.

-It's tough to lose weight.

-You always feel bloated.

-You have hypothyroidism.

-You easily develop cellulite.

-Your blood sugar is too high.

Answer:

152.26 mmHg

Explanation:

pv=p'v'

525× 25=p'×86.2

p'=525×25÷ 86.2

p'=152.26

Answer: 1.5 x 10 24

Explanation:

One mole of NaCl contains 6.022 x 1023 NaCl formula units

In 2.5 moles of NaCl there will be basically 5 moles of ions as per the given data.

A material created by joining two or more distinct elements chemically in science.

A compound in chemistry is a material comprised of two or more separate chemical elements mixed together in a certain proportion.

Chemical connections that are challenging to break are created when the elements interact with one another.

2.5 mol of NaCl contains 5 moles of ions. This is due to the fact that 1 mol of NaCl contains 2 mol of ions, so you must multiply the molecular weight of the molecule by two to obtain the number of ions.

Thus, the answer is 5 moles.

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Answer:

Yes

Explanation:

Answer: both are correct

Explanation:

Answer:

I believe that it is B

Explanation:

Answer: oxidation reactions

Explanation:

Answer:Explanation:Protons and other subatomic particles will be discussed a little later. The atoms of different elements are different from each other because they have different numbers of protons. The graphic below illustrates this point by showing the atoms of two elements in the containers of oxygen and hydrogen.

Answer:

The balanced equation is :

Zn(s) + H2SO4(aq) → ZnSO4(aq) + H2(g)

Answer: Nitrogen

Explanation: The atmosphere is actually mostly Nitrogen at 78% not oxygen.

Answer:

The correct reaction is as follows:

2Mg + O2 → 2MgO

3. Synthesis

Explanation:

Chemical reactions are of different types depending on how they occur. One of these types is called SYNTHESIS OR COMBINATION REACTION. A synthesis reaction is that reaction in which two atoms of two elements are chemically combined to form a single molecule or compound. That is;

A + B → AB.

This is the case in this question where atoms of Magnesium (Mg) and oxygen (O) reacted to form a single compound of Magnesium oxide (MgO). Hence, it is said to be a SYNTHESIS REACTION.

Answer:

Joules first law is a law that expresses the relatioship between heat that is generated and the current flowing heat thats through a conductor. The second law says that internal energy is independent of volume and pressure, depending only on temperature!

Explanation:

Answer:

Igneous rocks must go through the sedimentary process to change into metamorphic rocks. Igneous rocks are chemically changed into metamorphic rocks because of high temperature and pressure. Metamorphic rocks are formed from melting igneous rocks. Metamorphic rocks and igneous rocks do not follow a rock cycle.

Explanation:

hope this helps!

Answer:

C

Explanation:

It's igneous rocks must go through the sedimentary process answer thing

Answer:

CH4 + 4Cl2 ===> CCl4 + 4HCl

Explanation:

If you are having trouble understanding how to balance equations, use chemical equation calculators and they tell you step by step.

Answer:

I think the elements are carbon, hydrogen and oxygen but I'm not completely sure.

Answer:

B

Explanation:

Explanation:

The two ways that energy can be transferred are by doing work and by heat transfer.

Answer:

It is a method used to identify a suspect.

Explanation:

DNA fingerprinting is a method used to identify an individual from a sample of DNA by looking at unique patterns in their DNA.

Explanation:

[tex]CO _{2} \: and \: H _{2} O[/tex]

Reactants must be on the left hand side of the reaction