HELP ASAP PLEASE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer:

4. oxygen gas

Explanation:

when a plant goes through photosynthesis, it takes in Carbon Dioxide and releases Oxygen

Answer:

The second one would be one of the application of an endothermic reaction as because endothermic reaction always have the heat in the process to mix the reactants and form the products as here in a burning wood when the wood is supplied with heat then it change into products as ashes and smoke fumes So here due to the heat is involved to form the products thats the reaction is endothermic reaction.

Hope it helps

Answer:

Precipitation reaction

Explanation:

Given that solution A was mixed with solution B, the solution turned cloudy. The test is not warm and no bubbles visible. This means that the precipiate is formed.

The concept is when two colourless solutions react to form a cloudy precipitate that settles at bottom of a solution then the reaction is said to be a precipitation reaction.

An example can be the Reaction of Silver nitrate with common salt.

Answer:

V2~0.4839M

Explanation:

We're going to use Boyles law to answer the question.

Boyle's law:

P1V1=P2V2

P1=151mmHg

P2=166mmHg

V1=0.532L

V2=?

V2=(P1 x V1)/P2

V2=(151 x 0.532)/166

V2~0.4839M

Hope it helps:)

Answer: C. unknown

Explanation: got it right on acellus

Answer: it’s C hope that helps

Answer:

hmm I don't think its D because that doesn't have anything to do with your heath I don't think it's C either, probably not global warming so I think its A

Explanation:

I hope that helped :)

sorry if I'm wrong

Answer:

x is HCl because pH = 2 (acid and it reacted with Mg plus it turned litmus paper to red)

y is NaOH because pH = 10 (base and turned litmus paper to blue)

z is NaCl because pH = 7 (neutral and no reaction to litmus paper and Mg)

Answer:

Al is oxidized

Cu is reduced

Answer:

here

Cu is reduced

and

Al is oxidised

hope this will help you

have a nice day

Answer:

A film badge

Explanation:

The film badge dosimeter or film badge is a personal dosimeter used for monitoring cumulative radiation dose due to ionizing radiation. It of a photographic film and a holder. This film badge is used to determine or measure and record the radiation exposure as a result of radiations, x-rays, gamma rays and also beta particles.

All users of medical x-ray equipment (C-arms, fluoro units, therapy units) must wear badges. Those using larger quantities of radioactive materials will also be provided badges. The correct option is A.

Ionising radiation exposure is measured using photographic film for personnel monitoring purposes. A filter that protects part of the film from particular types of radiation may also be present in the film badge, which may contain two or three films with varying sensitivity levels.

A particular kind of passive dosimeter is the film badge. It comprises of a photographic emulsion film in a light-tight wrapping (kept in a holder) that changes optical density in response to ionising radiation. The holder, which also includes several filters (for calculating tissue equivalent amounts), is typically worn on the body's trunk.

So film badge is the device used most commonly today for monitoring the radiation exposure of personnel.

Thus the correct option is A.

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Answer:

There are 3 significant figures on this one.

Answer:

58,5

Explanation:

Answer:

Trabalho realizado por máquina térmica  = 250 J

Explanation:

Dado

Eficiência da máquina térmica = 5% = 0,05

A eficiência é igual à proporção do trabalho realizado pela máquina térmica para o calor fornecido a ela

Por isso,

0,05 = Trabalho realizado por máquina térmica / 5000 J

Trabalho realizado por máquina térmica = 5000 J * 0,05 = 250 J

Answer:

A group is a column of elements in the periodic table of the chemical elements.

So, the columns on the periodic table are called groups.

Answer:

Double bonds. It says I have to write more words lol but yeah it's double bonds

Answer:

You're in my science class wth

Explanation:

For instance farmers are using basic fertilizers to neutralize an acid soil –which is harmful for the plants- while basic solutions are added in the chimneys of factories to neutralize the acid smoke that they produce –avoiding the catastrophic effects of the acid rains. Acid released in the environment from industry creates acid rain which has many ecological effects. Acid rain makes waters acidic, and causes them to absorb the aluminium that makes its way from soil into lakes and streams. This combination makes waters toxic to crayfish, clams, fish, and other aquatic animals.

Answer:

Chemistry

Explanation:

Chemistry is considered the central science.

Chemistry is sometimes called "the central science" because it's so important to other fields of science, like biology, geology, astronomy, physics, medicine, engineering, materials science, and many other areas of study.

All the branches of science possess their own level of importance, However, physics deals with the fundamental workings of material reality which are central to all other branches of science.

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Answer:

Como Representar la distribución electrónica por el método de la escalera y con los cajones de la distribución eléctronica: En "s" máximo 2 electrones En "p" máximo 6 electrones En "d" máximo 10 electrones

Explanation:

SISISISISISISISISISISI

Answer:

Hello There!!

Explanation:

I believe the answer is nuclear.

hope this helps,have a great day!!

~Pinky~

Answer:

C) Nuclear

Explanation:

Trust the process

Edge 2021

Answer:

[tex]M_{base}=0.0311M[/tex]

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to solve for the molarity of the KOH solution by knowing this base react in a 1:1 mole ratio with nitric acid, HNO3; thus, we can write the following equation, as their moles are the same at the endpoint:

[tex]n_{acid}=n_{base}[/tex]

Which in terms of molarities and volumes is:

[tex]M_{acid}V_{acid}=M_{base}V_{base}[/tex]

Thus, we solve for the molarity of the base (KOH) to obtain:

[tex]M_{base}=\frac{M_{acid}V_{acid}}{V_{base}} \\\\M_{base}=\frac{4.60mL*0.1852M}{27.35mL}\\\\M_{base}=0.0311M[/tex]

Regards!

Answer:

16.8dm3

Explanation:

2 moles of CO gives 1 mole of N2

2 moles of CO= 2* 28= 56g

1 mole of N2 = 1* 22.4dm

56g of CO gives 22.4dm3 of N2

42.7 of CO will give> (42.7*22.4)/56

=16.8dm3

The volume of [tex]N_{2}[/tex] gas will be produced 16.8 [tex]dm^{3}[/tex].

Volume is sometimes referred to as capacity. The volume of a cylindrical jar, for example, is used to determine how much water it can hold.

Calculation of volume is shown below:

The given reaction is: 2CO(g) + 2NO) → N2(g) + 2CO2(g)

It can be seen that 2 moles of CO give 1 mole of [tex]N_{2}[/tex].

So, 2 moles of CO = 2×28 = 56 g.

Hence, 1 mole of [tex]N_{2}[/tex] = 1×22.4 = 22.4 [tex]dm^{3}[/tex].

56 g of CO will give 22.4 [tex]dm^{3}[/tex] of nitrogen atom.

42.7 of CO will give = (42.7×22.4) / 56

= 16.8 [tex]dm^{3}[/tex].

Therefore, the volume of nitrogen will be 16.8 [tex]dm^{3}[/tex].

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an element is a substance that cannot be split into simpler substances by a chemical means . for example - hydrogen, oxygen, nitrogen, carbon, iron, aluminium, copper, silver and gold some example of elements.

Answer:

14.53

Explanation:

V1= 218ML

V2= ?

P2= 15P1

USING BOYLE'S LAW

P1V1= P2V2

V2= P1V1/P2

V2 = P1(218ML)/15P1 = 14.53ML

Sand and water can be separated by any of the following methods:

1. Sedimentation and decantation: This method involves the mixture being kept undisturbed for some time. After some time, sand being heavier and insoluble in water, settles down at the bottom of container. Now, water is poured into another container to separate it from sand.

2. Filtration: This method involves the mixture being passed through a filter paper (a filter with very fine pores). Sand particles being larger in size are retained by the filter paper and get separated from water.

I hope this helps! :D

Answer:

Periodic Table

hope this helps

have a good day :)

Explanation:

The periodic table allows you to compare the elements and understand their properties​.

Periodic table is a tabular arrangement of elements in the form of a table. In the periodic table, elements are arranged according to the modern periodic law which states that the properties of elements are a periodic function of their atomic numbers.

It is called as periodic because properties repeat after regular intervals of atomic numbers . It is a tabular arrangement consisting of seven horizontal rows called periods and eighteen vertical columns called groups.

Elements present in the same group have same number of valence electrons and hence have similar properties while elements present in the same period show gradual variation in properties due to addition of one electron for each successive element in a period.

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Answer:

The breaking of chemical bonds never releases energy to the external environment. Energy is only released when chemical bonds are formed. In general, a chemical reaction involves two steps: 1) the original chemical bonds between the atoms are broken, and 2) new bonds are formed. These two steps are sometimes lumped into one event for simplicity, but they are really two separate events. For instance, when you burn methane (natural gas) in your stove, the methane is reacting with oxygen to form carbon dioxide and water. Chemists often write this as:

CH4 + 2 O2 → CO2 + 2 H2O + energy

Explanation:

here is the answer