What is the maximum number of valence electrons an element can have?
O A. 6
B. 18
O C. 8
O D. 10
Please help

Answers

Answer 1
I think it’s a or it could be c

Related Questions

Why is DNA called a double helix?

Answers

Answer:

the double helix of dna is, like its name, implies, in the shape of a helix which is essentially a three-dimensional spiral. the double comes from the fact that the helix is made of two long strands of dna that are intertwined—sort of like a twisted ladder.

Explanation:

hope this helps :)

have a nice day !!

Does the variable increase(1) or decrease(1) under the described conditions?

1. What happens to pressure as volume
increases?
2. What happens to pressure as temperature decreases?
3. What happens to volume as temperature decreases?
4. What happens to volume as the number of moles increase?​

Answers

Answer:

Explanation:

Decreasing the volume of a contained gas will increase its pressure, and increasing its volume will decrease its pressure. In fact, if the volume increases by a certain factor, the pressure decreases by the same factor, and vice versa. Volume-pressure data for an air sample at room temperature are graphed in Figure 5.

Because the volume has decreased, the particles will collide more frequently with the walls of the container. ... When the volume decreases, the pressure increases. This shows that the pressure of a gas is inversely proportional to its volume. This is shown by the following equation - which is often called Boyle's law.

The kinetic energy of the gas molecules increases, so collisions with the walls of the container are now more forceful than they were before. As a result, the pressure of the gas doubles. Decreasing the temperature would have the opposite effect, and the pressure of an enclosed gas would decrease.

For a fixed mass of gas at constant temperature, the volume is inversely proportional to the pressure. That means that, for example, if you double the pressure, you will halve the volume. If you increase the pressure 10 times, the volume will decrease 10 times.

Temperature, pressure, volume and the amount of a gas influence its pressure.

Gay Lussac's Law - states that the pressure of a given amount of gas held at constant volume is directly proportional to the Kelvin temperature. If you heat a gas you give the molecules more energy so they move faster. This means more impacts on the walls of the container and an increase in the pressure.

i really hope some of this helped i would put more but its a lot too type

Use the drop-down menus to complete the sentences.
The gain of electrons is called _________
The loss of electrons is called _________

Answers

Answer:

1.Reduction

2.oxidation

Explanation:

Answer:

Reduction

Oxidation

Explanation:

What is 3 pointing to

Answers

Answer:

Electrons

Explanation:

Electrons is the outside of the nucleus

Explain your observations in term of how tempurature affects paritcle motion and how liquid changes to a solid

Answers

Answer:

See explanation

Explanation:

Temperature is defined as a measure of the average kinetic energy of the molecules of a body.

When a substance is heated, the kinetic energy of its molecules increases as the temperature increases; hence the particles of the substance moves faster with increasing temperature.

When heat is withdrawn from a liquid, the temperature decreases and the average kinetic energy of the molecules decreases. The molecules become less energetic hence the liquid changes into solid

Turbo or supercharger

Answers

Honestly I like turbocharged.
Each can be used to increase power, fuel economy, or both, and each has pros and cons. But superchargers can provide their boost almost instantly, whereas turbochargers typically suffer some response lag while the exhaust pressure required to spin the turbine builds. So I would recommend a supercharger.

Which tiny, round “factory” puts together protein and is often found in the endoplasmic reticulum?

Golgi body

ribosome

chromosome

chloroplast

Answers

Mhmhmhmhmnmnmnmnmhmhmnvfghbb ribosome

Can someone double check my work? (Ideal Gas Law Equation)
I am solving for the amount of moles in two gases.
For one, it was 4.75mL at 0.5C (273.65K) and 1.2atm.
n=(1.2*4.75)/(0.0821/273.65)=(5.7/22.456)=0.25361653 moles
For the other gas, it was 4.6mL at 0.5C and 1.2atm.
n=(1.2*4.6)/(0.0821/273.65)=(5.52/22.456)=0.24581403 moles
Please double check these for any errors in math or whatever. Thank you.

Answers

I did not see any errors, i may be wrong but what i can see is that it is correct

Sodium is a compound
O True
or
O False

Answers

Answer:

i think false.

Explanation:

tell me if this is wrong

False,it is an element

Write a nuclear equation for each description below.

Stronitum-84 combines with an alpha particle, creating sodium-25 and a daughter nucleus. 4 pts

Answers

Answer:

Sr-84 + He-2  -> Na-25 + Pm-61

Explanation:

Movement of the ___
creates the London dispersion forces.

Answers

Answer: electrons

Explanation: moving electrons cause momentarily charge

Distribution on molecule. This distribution induces similar distribution to

Adjacent molecule.

A sample of a compound containing only carbon and hydrogen atoms is completely combusted, producing
11.0 g of CO, and 4.5 g of H,O.
Which of the following is the empirical formula of the compound?
Choose 1 answers
CH
B
CH
CH3
C2H

Answers

It’s the last one C2H

The empirical formula will be C2H.

What is empirical formula?

The easiest whole-number proportion of the numerous elements in a molecule is represented by an empirical formula.

Calculation of empirical formula

Given data:

C = 11.0 g

H = 4.5 g

The atomic mass of C = 12

The atomic mass of H = 1

Now, divide the mass by atomic mass.

1) For carbon atom= 11 / 12 =0.91

2) For hydrogen atom = 4.5 / 1=4.5

Now, divide the lowest term by the obtaining whole number.

1) For carbon atom = 11/ 0.91 = 12

2) For hydrogen atom = 4.5/0.91 = 5

Therefore, the empirical formula will be C2H,

To know more about empirical formula

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Potassium manganate(VI), K2MnO4, can be made to react with water,
forming potassium permanganate, KMnO4, potassium hydroxide,
KOH, and hydrogen gas. This reaction is used in industry to produce
potassium permanganate, which is widely used in analytical chemistry.
Write the balanced equation for this reaction

Answers

K2MnO4+(2)H2O —>KMnO4+(2)KOH+(2)H2

Coefficients are in parentheses and subscripts are just normal letters

Help ASAP I’ll mark you as brainlister

Answers

Answer:

2.51g Mg

Explanation:

The empty crucible had a mass of 35.84. With the magnesium added, it had a mass of 38.45. This means that you should subtract the mass of the empty crucible from the mass of the crucible with Mg to find how much was added.

38.35g - 35.84g = 25.1g

At higher altitudes would there be more or less
oxygen available to breathe?
a. Less oxygen is available at higher altitudes.
b. More oxygen is available at higher altitudes.

Answers

Answer: less oxygen available at higher altitudes

Explanation:

The higher in elevation you get, the lower the air pressure, allowing oxygen atoms to spread out farther, therefore making available oxygen less.

LESS OXYGEN

the higher up you get the higher the air pressure is

What do we call the phenomena when plants bend towards the light?
Photomorphogenesis
Auxin
Phototropism
Photosynthesis

Answers

We would call it Phototropism.

The core of earth is made of iron and nickel the outer core is so hot that it melts metal. The inner core is solid. What causes these diffrences

Answers

Answer:

The inner core is solid by intense pressure of all the layers above it.

Explanation:

The inner core is made up of heavy elements such as iron and nickel. It therefore possesses an unusually high pressure that makes the expanded inner core which arose from effects of high temperature to be nullified.

Thus, we can say that the inner core is solid by intense pressure of all the layers above it.

What does a wave carry
A.Energy B.Matter C.Molecule D.Particle​

Answers

Answer:

Energy

Explanation:

As waves move from one place to another, they carry energy. Generally, the medium itself doesn't move much as it is the disturbance that is being transmitted

Answer:

energy because a wave isnt like a physical thing so it isnt gonna have matter or particles or molecules its just a movement of energy like a sound wave has no matter so it doesnt have particles and stuff

Explanation:

i know i sound very scientific XD

The main reason that we have different types of energy on the electromagnetic spectrum is because they have different

Answers

Answer:

Explanation:

The main reason is because they have different energy in the photon and different wavelength.

In the electromagnetic radiations, radio waves have little energetic photons, micro wave have more that radio waves, the visible light, ultraviolet x Ray's, and gamma Ray's have more energetic photons. They have different wavelength. The shorter the wavelength, the higher the frequency. Wavelength decreases while frequencies increases.

Bob sees some water droplets on the outside surface of a glass of lemonade. What process of the water cycle explains this?
A. condensation
B. evaporation
C. precipitation
D. transpiration

Answers

the answer is
A. condensation

Answer:

es la a porque ay está condensación por

Which of the following statements is not true about the object moving with constant speed?

A. The object is not accelerating
B. The speed of the object is equal to zero
C. The distance travelled by the object increase uniformly
D. The speed of the object remains the same all throughout the travel. ​

Answers

Answer: B The speed of the object is equal to zero

Explanation:

in pressure dunt
uwing
frost shattering​

Answers

Answer:

i dont get it???????

Explanation:

(science)Which type of harmful alleles may disappear from a population more slowly when the individual may still reproduce?
a.a dominant allele
b.a recensive allele
c.a double allele
d.a single allele

Answers

The answer for this question is A

A plastic bag containing 2.2 L of gas at
1.0 atm pressure is cooled from 30°C to
0 °C. What will be the volume of the gas?​

Answers

Answer: The volume of the gas is 1.98 L.

Explanation:

To calculate the final volume of the system, we use the equation given by Charles' Law. This law states that volume of the gas is directly proportional to the temperature of the gas at constant pressure.

Mathematically,

[tex]\frac{V_1}{T_1}=\frac{V_2}{T_2}[/tex]

where,

[tex]V_1\text{ and }T_1[/tex] are the initial volume and temperature of the gas.

[tex]V_2\text{ and }T_2[/tex] are the final volume and temperature of the gas.

We are given:

[tex]V_1=2.2L\\T_1=30^oC=(30+273)K=303K\\V_2=?\\T_2=0^0C=(0+273)K=273K[/tex]

Putting values in above equation, we get:

[tex]\frac{2.2}{303}=\frac{V_2}{273}\\\\V_2=1.98L[/tex]

Thus the volume of the gas is 1.98 L

3. Infer Do all elements have half-lives? Why or why not?

Answers

Answer:

Elements with short half lives exist because each element has stable isotopes, and the decay os isotopes create more isotopes as well.

How many moles of Iron Fe, are in 0.054g of iron?​

Answers

Answer:

9.643×10^-4 mole is your answer

Explanation:

56 g of iron =1 mole

0.054 g of iron =1×0.054/56=9.643×10^-4 mole

An industrial synthesis of urea obtains 87.5 kg of urea upon reaction of 68.2 kg of ammonia with excess carbon dioxide. Determine the theoretical yield of urea and percent yield for the reaction.

Answers

Answer:

The theoretical yield of urea = 120.35kg

The percent yield for the reaction = 72.70%

Explanation:

Lets calculate -

The given reaction is -

[tex]2NH_3(aq)+CO_2[/tex] →[tex]CH_4N_2O(aq)+H_2O (l)[/tex]

Molar mass of urea [tex]CH_4N_2O[/tex]= 60g/mole

Moles of [tex]NH_3[/tex] = [tex]\frac{62.8kg/mole}{17g/mole}[/tex] (since [tex]Moles=\frac{mass of substance}{mass of one mole}[/tex])

                     = 4011.76 moles

Moles of [tex]CO_2[/tex] = [tex]\frac{105kg}{44g/mole}[/tex]

                = [tex]\frac{105000g}{44g/mole}[/tex]

                = 2386.36 moles

Theoritically , moles of [tex]NH_3[/tex] required = double the moles of [tex]CO_2[/tex]

    but , [tex]4011.76<2\times 2386.36[/tex] , the limiting reagent is [tex]NH_3[/tex]

Theoritical moles of urea obtained = [tex]\frac{1 mole CH_4N_2O}{2mole NH_3}\times4011.76 mole NH_3[/tex]

                                                      = [tex]2005.88mole CH_4N_2O[/tex]

Mass of 2005.88 mole of [tex]CH_4N_2O[/tex] =[tex]2005.88 mole \times\frac{60g CH_4N_2O}{1mole CH_4N_2O}[/tex]

                                                     = 120352.8g

                                                     [tex]120352.8g\times \frac{1kg}{1000g}[/tex]

                                                     = 120.35kg

Therefore , theroritical yeild of urea = 120.35kg

Now , Percent yeild = [tex]\frac{87.5kg}{120.35kg}\times100[/tex]

                                 72.70%

Thus , the percent yeild for the reaction is 72.70%

Determine the representative particles of
0.075 mol Ti
2.10 mol CO2​

Answers

Answer:

0.o75 mol Ti = 4.5x10∧22

2.10 mol CO2 = 1.26x10∧24 molecules

               hope this helped

Choose the correct name for NH3 according to the naming system being used. What is the IUPAC name for NH3? ammonia mononitrogen hydride mononitrogen trihydride nitrogen trihydride

Answers

Answer:

Nitrogen Trihydride

Explanation:

Ammonia is the common name of NH3. However, with this naming system, you should name it as a non-metal. Nitrogen trihydride.

Answer:

Nitrogen Trihydride

Explanation:


What is the mass of an atom with 8 protons, 8 electrons, and 8 neutrons?

Answers

Answer:An oxygen atom usually has 8 protons, 8 neutrons, and 8 electrons. Looking at the periodic table, oxygen has atomic number 8 and atomic weight 15.999.

Explanation:

The mass of the atom with 8 protons, 8 electrons, and 8 neutrons would be approximately 16 atomic mass units as the number of electrons has an almost negligible contribution to the mass of the atom.

What is atomic mass?

It is the sum of the mass of all the protons as well as the neutrons that are present inside the nucleus.

Atomic mass = total number of protons present in the nucleus + total number of neutrons present in the nucleus of an atom,

As given in the problem we have to find the atomic mass of the atom with  eight protons, eight electrons, and eight neutrons,

This given specified atom clearly represents the oxygen atom as it has eight electrons protons and neutrons each.

Thus, the atomic mass of the given atom would be 16.

Learn more about atomic mass from here, refer to the link;

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