help please I would really appreciate ​

Answer:

Silicon

Explanation:

Nucleus

14 protons

Group 14

Number 14

+4, +2, or -4

Answer:

Explanation:

Name of the part of this atom labeled z is nucleus.

number of protons is 14 .

the given element is silicion and it lies in group 14.

the no of period that contains this element is  3.

charge formed on the ion formed from this atom is positive charge because it gives 4 electron to other element .

If the element gains the electron then it has negative charge where as when it loses it will have positive charge.

Answer: The volume of the solution is 28.75 mL

Explanation:

Molarity is defined as the amount of solute expressed in the number of moles present per liter of solution. The units of molarity are mol/L. The formula used to calculate molarity:

[tex]\text{Molarity of solution}=\frac{\text{Given mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (mL)}}[/tex] .....(1)

Given values:

Molarity of copper nitrate = 0.560 M

Given mass of copper nitrate = 3.02 g

Molar mass of copper nitrate = 187.56 g/mol

Putting values in equation 1, we get:

[tex]0.560=\frac{3.02\times 1000}{187.56\times \text{Volume of solution}}\\\\\text{Volume of solution}=\frac{3.02\times 1000}{187.56\times 0.560}=28.75mL[/tex]

Hence, the volume of the solution is 28.75 mL

Answer:

19 protons, 20 neutrons and 18 electrons.

Explanation:

The atomic number gives the number of protons 19

p = 19

The atomic mass is the sum of the protons and neutrons

p + n = 39   p = 19

put p into the equation and solve for n the neutrons.

19 + n = 39

Subtract 19 from both sides

19 − 19 + n = 39 − 19

n = 20

The number of electrons equals the number of protons in a neutral atom. The positive charge equals the negative charge. The negative charge is the number of electrons. This ion has a charge of +1. So solve for the negative charge.

− 19 + 1 = − 18

The negative charge is -18 so

e = 18

Answer:

EF-2

hurricane/tropical cyclone

recurrent weather

The two types of downbursts are macrobursts and microbursts. A macroburst affects an area that's greater than 2.5 miles across. A microburst affects an area that's less than 2.5 miles across.

A funnel cloud forms as a spinning column of air that descends from a thundercloud. However, a funnel cloud doesn't become a tornado until it actually touches the ground. Once it touches the ground, where it begins to pick up dust and debris, it becomes a tornado.

Tropical cyclones, such as hurricanes, are fueled by warm ocean waters. Once they make landfall, they lose this fuel source and begin to lose strength.

The heat index and the wind chill index are similar because both consider other factors that affect how air temperature feels. The heat index considers relative humidity in relation to air temperature. Higher humidity makes air temperatures feel hotter. The wind chill index considers wind speed in relation to air temperature. Higher wind speeds make air temperatures feel colder.

Heat waves—Heat waves can be very dangerous when accompanied by high humidity. The human body depends on evaporation of sweat to cool itself down on hot days. When humidity levels are high, the rate of evaporation slows down. Consequently, it becomes harder for the body to cool itself and much easier for the body to overheat.

Explanation:

took the testoronee

Answer:

4 is chemical and 6 is a

Explanation:

hope this helps

Answer:

boiling point, temperature at which the pressure exerted by the surroundings upon a liquid is equaled by the pressure exerted by the vapour of the liquid; under this condition, addition of heat results in the transformation of the liquid into its vapour without raising the temperature.

Explanation:

Radhe Radhe❤

Explanation:

The point at which a matter melts is called boiling or melting point.

Answer:

D es pero que te ayude amigo

Answer:

[tex]CH _{3}CH(CH _{3})CH _{2}COO {}^{ - } \\ \\ [/tex]

Answer:

[tex]a = \frac{24.79078- 1.7161b}{1.310 - b}[/tex]

[tex]b = 1.310 - \frac{22.5427}{a - 1.7161}[/tex]

Explanation:

Given

[tex]P = 1\ atm[/tex]

[tex]V = 1.310\ L[/tex]

[tex]T =160\ K[/tex]

Required

Solve for a and b

Van Der Waals equation is:

[tex]P = \frac{RT}{V - b} - \frac{a}{V^2}[/tex]

Substitute values for P, V and T, we have:

[tex]1 = \frac{R*160}{1.310 - b} - \frac{a}{1.310^2}[/tex]

R is a constant and the value is:

[tex]R = 0.0821[/tex]

So, the equation becomes:

[tex]1 = \frac{0.0821*160}{1.310 - b} - \frac{a}{1.310^2}[/tex]

Simplify the expression

[tex]1 = \frac{13.136}{1.310 - b} - \frac{a}{1.7161}[/tex] ----- (a)

Solving for (a):

[tex]1 + \frac{13.136}{1.310 - b} = \frac{a}{1.7161}[/tex]

Multiply both sides by 1.7161

[tex]a = [1 + \frac{13.136}{1.310 - b}] * 1.7161[/tex]

Take LCM

[tex]a = [\frac{1.310 - b+13.136}{1.310 - b}] * 1.7161[/tex]

Evaluate like terms

[tex]a = [\frac{14.446- b}{1.310 - b}] * 1.7161[/tex]

Open bracket

[tex]a = [\frac{24.79078- 1.7161b}{1.310 - b}[/tex]

Solving for (b), we have:

[tex]1 + \frac{13.136}{1.310 - b} = \frac{a}{1.7161}[/tex]

Subtract 1 from both sides

[tex]\frac{13.136}{1.310 - b} = \frac{a}{1.7161}-1[/tex]

Take LCM

[tex]\frac{13.136}{1.310 - b} = \frac{a-1.7161}{1.7161}[/tex]

Inverse both sides

[tex]\frac{1.310 - b}{13.136} = \frac{1.7161}{a - 1.7161}[/tex]

Multiply both sides by 13.136

[tex]1.310 - b = 13.136 * \frac{1.7161}{a - 1.7161}[/tex]

[tex]1.310 - b = \frac{22.5427}{a - 1.7161}[/tex]

Collect like terms

[tex]b = 1.310 - \frac{22.5427}{a - 1.7161}[/tex]

Answer:

number of moles=volume/molar volume or mass/molar mass

Answer:

The X ray’s wavelength is 4.61*10⁻¹¹ m

Explanation:

Wavelength is the minimum distance between two successive points on the wave that are in the same state of vibration. It is expressed in units of length (m).

Frequency is the number of vibrations that occur in a unit of time. Its unit is s⁻¹ or hertz (Hz).

The propagation speed is the speed with which the wave propagates in the medium, that is, it is the magnitude that measures the speed at which the wave's disturbance propagates along its displacement. Relate the wavelength (λ) and the frequency (f) inversely proportional using the following equation:

v = f * λ.

In this case:

Replacing:

3*10⁸ [tex]\frac{m}{s}[/tex]= 6.5*10¹⁸ Hz* λ

Solving:

[tex]wavelength= \frac{3*10^{8} \frac{m}{s} }{6.5*10^{18} Hz}[/tex]

λ= 4.61*10⁻¹¹ m

The X ray’s wavelength is 4.61*10⁻¹¹ m

Answer:

aluminum chloride> potassium bromide> butanoic acid> sugar

Explanation:

Conductivity has to do with the ability of a solid to dissolve in solution leading to the formation of mobile ions which are the charge carriers in solution.

Strong electrolytes produce more ions in solution hence they have a higher conductivity.

Aluminum chloride produces four particles in solution hence it has the highest conductivity followed by potassium bromide which produces two particles in solution. Butanoic acid is a weak electrolyte which dissociates only to a small extent while sugar is a nonelectrolyte, it does not dissociate at all in solution.

Explanation:

here is the answer bae. Feel free to ask for more chem help

Answer:

A

Explanation:

B is for photosynthesis, C and D are just energy conversions, A is all about producing energy and stored as Adenosine Triphosphate(ATP) which is respiration

Answer:

Verdadero.

Explanation:

¡Hola!

En este caso, dado que las propiedades periódicas nos hablan de un comportamiento específico sobre los elementos en la tabla periódica, resulta primeramente necesario recordar que la electornegatividad nos dice que tan fuerte es un elemento para atraer electrones de valencia de otros elementos.

De este modo, inferimos que es verdadero, ya que de hecho la electronegatividad nos define el tipo de enlace, basado en la diferencia de electronegatividades de los elementos enlazados, de acuerdo con la imagen adjunta.

Saludos!

Answer:

It is alkyne

Explanation:

Answer: In the given reactions neither reaction 1 nor 2 reaction leads to an increase in entropy.

Explanation:

The degree of randomness present in the molecules of a substance is called entropy.

In gases, molecules are held by weak forces due to which they move apart from each other. Hence, they have high entropy.

In liquids, molecules are a little close to each other so they have less entropy than gases.

In solids, molecules are tightly held together so they have least or negligible entropy.

As reaction 1 is [tex]CaO(s) + CO_{2}(g) \rightarrow CaCO_{3}(s)[/tex] and it shows that product is in solid state. Therefore, entropy is decreasing.

As reaction 2 is [tex]H_{2}O(g) \rightarrow H_{2}O(l)[/tex] and it shows that gas is converted into liquid. Therefore, entropy is also decreasing here.

Thus, we can conclude that in the given reactions neither reaction 1 nor 2 reaction leads to an increase in entropy.

Answer: Neither Reaction 1 nor 2

Explanation:

Answer:

The Ideal gas law

Explanation:

From the given question, we have:

V [tex]\alpha[/tex] [tex]\frac{nT}{P}[/tex]

where each variable has its usual meaning.

Thus,

V = [tex]\frac{nRT}{P}[/tex]

where R is the ideal gas constant

cross multiply to have;

PV = nRT

This implies that the volume of the gas is directly proportional to the number of moles of the gas.

Therefore, the law can be used to determine the relationship between the volume and number of moles is the ideal gas law.

Answer:

Emulsion

Explanation:

According to Oxford dictionary, a colloid is, ''a homogeneous non-crystalline substance consisting of large molecules or ultramicroscopic particles of one substance dispersed through a second substance. Colloids include gels, sols, and emulsions; the particles do not settle, and cannot be separated out by ordinary filtering or centrifuging like those in a suspension.''

An emulsion is a dispersion of a liquid in a liquid. This means that the the physical state of dispersed phase and dispersion medium is same.

Examples of emulsions include; Vinaigrette, homogenized milk and hair cream.

Answer:

Transparency to visible light and microwaves. Very good resistance to ageing, wear and heat. Lightweight, impact and shatter resistant. Good gas and moisture barrier properties

Explanation:

Answer:

Your Welcome! :)

Explanation:

What are the Characteristics of Polyethylene terephthalate (PETE or PET)?

Chemical Resistance: PET does not react with water or food which is one of the reasons it is used for consumable packaging.

Strength to Weight Ratio: PET is very strong for its lightweight.

Shatterproof: PET will not break or fracture.

Answer:

s1 to GS as the amount of energy required to remove the electron is greatest when it is closest to the nucleus.

Explanation:

Fun facts:

When the electron changes levels, it decreases energy and the atom emits photons. The photon is emitted with the electron moving from a higher energy level to a lower energy level. The energy of the photon is the exact energy that is lost by the electron moving to its lower energy level.

Answer:

The answer is: S.1 to G.S

Hope this helpss :) <3

Explanation:

Answer:

Proton & neutron

Explanation:

electrons only affect the charge. neutrons affect the mass and stability of an atom.

Explanation:

A B C D isme koyi ans hain doond lo

Oxidation reaction

Hope this helps! :)

Answer:

3.830177515 moles

Explanation:

You have :

Therefore: n=647.3/169

=3.830177515 moles