does anyone know if these are correct? if not can anyone tell me what the answers are?

Answer:

b i think im not fully sure

Explanation:

Answer:

C- Both isolation and low population

Explanation:

90 percent sure

Answer:

respiración

Explanation:

Answer:

number of neutrons = mass number - number of protons

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Answer:

Molarity can be used to calculate the volume of solvent or the amount of solute. The relationship between two solutions with the same amount of moles of solute can be represented by the formula c1V1 = c2V2, where c is concentration and V is volume.

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Answer:

9

[tex]4X \: + \: 3Y _{2} \: → \: 2X _{2} Y _{3}[/tex]

Sum = 4+3+2

=9

Answer:

D

Explanation:

The first stage of a lunar eclipse:

Penumbral eclipse.

There are 7 stages of a total lunar eclipse. The first one is when the Penumbral eclipse begins. his begins when the penumbral part of Earth's shadow starts moving over the Moon. This phase is usually not feasible to be seen with the naked eye.

Answer:

23

Explanation:

Answer: The specific heat capacity of the unknown metal given is [tex]0.466 J/g^{o}C[/tex].

Explanation:

Given: Mass = 225 g

Change in temperature = [tex]13^{o}C[/tex]

Heat energy = 1363 J

The formula used to calculate specific heat is as follows.

[tex]q = m \times C \times \Delta T[/tex]

where,

q = heat energy

m = mass of substance

C = specific heat

[tex]\Delta T[/tex] = change in temperature

Substitute the values into above formula as follows.

[tex]q = m \times C \times \Delta T\\1363 J = 225 g \times C \times 13^{o}C\\C = \frac{1363 J}{225 g \times 13^{o}C}\\= 0.466 J/g^{o}C[/tex]

Thus, we can conclude that the specific heat capacity of the unknown metal given is [tex]0.466 J/g^{o}C[/tex].

Explanation:

there you go you can just look up atomic model for CD and click images

here's your solution

==> distance covered = 6 km

==> time taken = 30 min

==> time in hour = 30/60 = 1/2hr

= speed = distance/time

==> speed = (6)/(1/2)

==> speed = 12 km/hr

hope it helps

When a dog run 6 km in 30 minutes then dogs average speed will be 12 km/h.

The average speed of something is computed by dividing the number distance travelled by the total time it took to travel that distance. Average speed can be determined by the formula:

V=d/T

where, V is average speed , d is distance and T is time.

It is given that , d= 6 km and T= 30 minutes(0.5 h).

Calculation of average speed is show below:

Now, puts the value of given data in average speed formula.

Average speed(V )= 6/ 0.5 = 12 km/h

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Answer:

Las fuentes secundarias son testimonios de segunda mano elaborados con posterioridad a los hechos ocurridos y basados en la información de las fuentes primarias, por ejemplo: libros y revistas, películas, video-documentales, series televisivas, textos escolares y mapas temáticos.

Answer:

Las fuentes de luz secundarias son aquellas que reflejan la luz que produce otra fuente. Por ejemplo: la luz de la luna (refleja la luz que produce el Sol), un espejo.

Explanation:

Answer: Most likely around the knob area or by the bolts that hold the door up.

Explanation:

If you attempted to pry open a locked window with a screwdriver, the screwdriver would leave a tool mark on the window and windowsill.

The impressions made by a tool when it comes in contact with an object are called as tool marks. These tool marks exhibit a variety of impressions depending upon the type of tool, its shape and its use. They are classified into different types depending upon the force with which they are made.

The study of tool marks is very useful in forensic science which includes information about the analysis of tool marks at the crime scene and in the laboratory, the interpretation and assessment of challenges for examination and interpretation and also the way in which tool mark evidence can be presented in a courtroom.

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Answer:

yes jrs true

Explanation:

In some ways, sparks are harmful. So, the statement e is not true.

When an ionized, electrically conductive channel is formed through a typically insulating substance by a sufficiently strong electric field, it results in a sudden electrical discharge known as an electric spark.

Here,

Sparks are the sudden electric discharges; therefore, we can say that they are capable of causing damage to the sensitive electronic devices.

Also, a small, sudden ignition spark created in grain elevators can eventually cause mild explosions.

In an operating room, sparks can start an explosion of anesthetic gas.

Heart pacemakers can be harmed by sparks.

So we can say that sparks are capable of causing many types of damages. So, it is dangerous in someway.

Hence,

In some ways, sparks are harmful. So, the statement e is not true.

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Answer:

a

Explanation:

Answer: The balanced chemical equation is [tex]2NaNO_{3}(s) + Heat \rightarrow 2NaNO_{2}(s) + O_{2}(g)[/tex] and it is a decomposition chemical reaction.

Explanation:

A chemical reaction in which single compound is decomposed into two or more species is called a decomposition reaction.

For example, [tex]NaNO_{3}(s) + Heat \rightarrow NaNO_{2}(s) + O_{2}(g)[/tex]

As the compound [tex]NaNO_{3}[/tex] is decomposing to given two different substances. So, it is a decomposition reaction.

Here, the number of atoms on reactant side are as follows.

The number of atoms on product side are as follows.

To balance this equation, multiply [tex]NaNO_{3}[/tex] by 2 on reactant side and multiply  [tex]NaNO_{2}[/tex] by 2 on product side. Therefore, the equation will be rewritten as follows.

[tex]2NaNO_{3}(s) + Heat \rightarrow 2NaNO_{2}(s) + O_{2}(g)[/tex]

Here, number of atoms on reactant side are as follows.

The number of atoms on product side are as follows.

Hence, this equation is balanced.

Thus, we can conclude that the balanced chemical equation is [tex]2NaNO_{3}(s) + Heat \rightarrow 2NaNO_{2}(s) + O_{2}(g)[/tex] and it is a decomposition chemical reaction.

Answer:  Molecular Formula is C5H5

Explanation:   M(CH) = 13.018 g/mol

 Empirical formula of compound is (CH)x in which x = 2,3,4,...

   Molar mass of the substance is 65 g.   x = 65 g/mol : 13 g/mol = 5

Answer:

Fe2O3 + C → 2Fe + CO3

Explanation:

The unbalanced equation given in this question is as follows:

Fe2O3 + C → Fe + C03

To balance this equation, one should ensure that the number of atoms of each element on both sides of the equation is equal. The balanced equation is as follows;

Fe2O3 + C → 2Fe + CO3

N.B, there are;

- 2atoms of Fe on both sides

- 1 atom of C on both sides

- 3 moles of O on both sides

You have the correct answer

Answer:

The distance from one wave peak to the next wave peak

Explanation:

a pex

The trait of a wave that is described by its wavelength is the speed and direction that the wave is traveling. Therefore, the correct option is option A.

Energy is moved around the world in two main ways: mechanical waves as well as electromagnetic waves. Mechanical waves include air and water waves caused by sound. A disruption or vibration within matter, either solid, gas, liquid, and plasma, is what generates mechanical waves.

A medium is described as material through which waves are propagating. Sound waves are created by vibrations inside a gas, while water waves are created by vibrations inside a liquid (air). The trait of a wave that is described by its wavelength is the speed and direction that the wave is traveling.

Therefore, the correct option is option A.

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Explanation:

Greenhouse gases are gases in Earth's atmosphere that trap heat. They let sunlight pass through the atmosphere, but they prevent the heat that the sunlight brings from leaving the atmosphere.

Answer:

Tree's absorb so much carbon dioxide from the atmosphere and store the carbon in their biomass

Answer:

2.0371352212585085

Explanation: