HELP ME OUT PLEASE!!!!!!!!!

Compare and contrast model A with model C. How are they alike: How are they different?

A) They are composed of different elements in the same ratio.

B) They are composed of the same elements in different ratios.

C) They are composed of different elements in different ratios

D) The are composed of the same elements but the bond types differ​

Answers

Answer 1

Answer:

Model C has more double the oxygen than A. I think it is B

Explanation:

Answer 2
B I had got this on my chemistry test before and it was right

Related Questions

A reaction between solid sodium hydroxide and gaseous carbon dioxide produced solid sodium carbonate and liquid water. Write out a balanced equation for this reaction.

Answers

Balanced:

2NaOH + CO2 → Na₂CO₃ + H₂O

Explanation:

To balance an equation, the amount of atoms on each side must be equal.

Atom Count on Reactant Side:

Na = 1O = 3H = 1C = 1

Atom Count On Product Side:

Na = 2C = 1O = 4H = 2

As you see, to simply balance the equation, put the 2 in order for the atom count on the reactant side to be equal to the product side. The 2 will add one more of each atom so that its the same as the product side.

what is the name of something that starts with N and ends with G

Answers

Nutmeg

Nubbing

Notifying

Neezing

Nudging

Needing

Niffing

Narcotizing

Nanjing

Neighbouring

Nothing

Nimming

Neighboring

Netting

Nesting

Narcing

Nitpicking

Non-Living

Neutralizing

Nightwalking

Nonspeaking

Which statement best describes the effect of radioactive decay on a nucleus?

Answers

When radioactive decay occurs, the original nucleus splits into daughter nuclei and the resulting nucleus is more stable than the original nucleus. The nucleus can be of a different element than the original.

Unstable nuclei often undergo radioactive decay. In a radioactive decay, the unstable nucleus is broken up into other nuclei. Usually, the nuclei formed during radioactive decay are smaller in mass compared to the original nucleus.

Also, the resulting nucleus is more stable than the original nucleus. The nucleus can be of a different element than the original.

The effect is that the nucleus changes into the nucleus of one or more other elements. These daughter nuclei have a lower mass and are more stable (lower in energy) than the parent nucleus.

Draw the Lewis structure for C2H4 (whose skeletal structure is H2CCH2). Draw the molecule by placing atoms on the grid and connecting them with bonds. Include all lone pairs of electrons. - CHONSPFBrClIXMore

Answers

Answer:

This is a picture of it hope this helps!

The Lewis structure along with bonds for ethene (C₂H₄) is drawn below-

A Lewis Structure is a very simplified representation of the valence shell electrons in a molecule. It is used to show how the electrons are arranged around individual atoms in a molecule.

The shared pairs of electrons are drawn as lines between atoms, while lone pairs of electrons are drawn as dots next to atoms.

They also display the total number of lone pairs present in each of the atoms that constitute the molecule.

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i want help with these questions thanks !​

Answers

Answer:

I will give you hints, as follows:

Explanation:

- two words: climate change

- methane smells funny

- the number of electric cars sold each year is increasing

- there´s a reason they´re call "renewable"

- GEOmetry, GEOlogy, GEOthermal

Hope this helps!

answer this please thank you

Answers

Answer:

6am

Explanation:

answer this please thank you

If not 6 am then maybe 10am correct me if I’m wrong though

hormones that are essential for normal body growth and maturation include all the following except?

a. thyroid hormone
b. growth hormone
c. Ghrelin
d. insulin

Answers

The main hormones concerned with growth are Thyroid hormones

đặc điểm cơ bản nào để phân biệt vật thể tự nhiên và vật thể nhân tạo

Answers

Answer:

natural materials like cotton

Use the diagram below to answer 3 questions

Answers

Answer:

The element X is sulfur.

Sulfur will gain 2 electrons to become an ion.

The charge of sulfide ion is (2-).

Explanation:

In a reaction, 0.209 moles of gas is evolved. Given that the pressure is 0.669 atm and the volume of the gas is 7.30 L, calculate the
temperature of the gas in Kelvin, giving your answer to three significant figures.
The value of R is 0.0821 L'atm-K-1.mol-1
Temperature =
Kelvin

Answers

16161819292xxdddscccdd

How many of sodium (Na) are needed to make 4.5 liters of a 1.5mol/L of Na solution?​

Answers

Answer:

Explanation:

First you will find the mole from the molarity and then the desired mass from the mole.

how many nuetrons are in the nucleous of an atom number of 25?

Answers

Answer:

I believe there are 30

Explanation:

Which of the following statements are true concerning product distribution in the halogenation of an alkane?

a. Halogenation of alkanes follows a chain mechanism.
b. The initiation process involves the formation of a halogen molecule.
c. Heat or UV light causes the weak halogen bond to break.
d. A radical is an intermediate with a single unpaired electron.
e. Halogenation of alkanes is a rearrangement reaction.

Answers

Halogens combine with alkanes to yield halogenoalkanes. It is a chain reaction.

Alkanes are a group of organic molecules whose functional group is the carbon - carbon single bond. The halogenation of alkanes refers to the process by which alkanes reacts with halogen molecules to yield halogenoalkanes.

The following are true statements regarding the halogenation of alkanes;

Halogenation of alkanes follows a chain mechanism.Heat or UV light causes the weak halogen bond to break.A radical is an intermediate with a single unpaired electron.

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Nail polish remover is something that girls just can't do without. Which of the following has been used as the active ingredient in nail polish remover?
limonene
acetone
methanol
ethanol

Answers

Answer:

Acetone has been used as the active ingredient in nail polish remover.

plz help me I will mark as brainlest

All three metals react with cold water.
Complete the word equation for these reactions.
metal + water ➡️ _______ + ________​

Answers

Answer:

metal oxide +hydrogen gas

Bas +
PtF2 →
BaF2 +
Pts
Need to balance it

Answers

it is already balanced

REACTANTS

Barium sulfide (BaS) + platinum (Ii) fluoride

PRODUCT

Barium fluoride (BaF2) + Cooperite (PtS)

Hope this answer helps you dear! take care

Question 1
Which of the following describes the movement of molecules in a solid?
O Molecules are stationary.
O Molecules vibrate in fixed positions.
O Molecules move fast enough to change position.
O Molecules move freely.

Please help ASAP!!!

Answers

Answer:

Molecules vibrate in a fixed position.

Explanation:

first one is just wrong.

third is liquid

fourth is gas

if 2.4l of chlorine at 400 mm hg are compressed to 725 mm hg at a constant temperature. what is the new volume?

Answers

Answer: 1.324L

Explanation: use Boyles law, sorry so late!

Which of the following types of models is generally used to predict long-term events? a. idea model b. physical model c. computer model d. none of the above Please select the best answer from the choices provided A B C D Mark this and return

Answers

Answer:

C

Computer model is generally used to predict long-term events

I hope it helps.

9) Observe the halogens. Fluorine and chlorine are gases, bromine is a liquid, and
iodine is a solid all at room temperature.
Distinguish between these differences in phase.
A) From Fluorine to lodine, the number of electrons increases.
This allows the intermolecular forces to strengthen from
temporary dipole (dispersion) forces to permanent dipoles.
Therefore, iodine is a solid because it has the most electrons.
B) From Fluorine to lodine, the nucleus gets larger. More
neutrons, protons and electrons allow the atoms of these
elements to become more attracted to each other. This is also
the reason that the halogens are diatomic naturally.
) From Fluorine to lodine, the molecular mass increases. With
the increase in mass, there is an increase in protons. This causes
the strength of the intermolecular forces between particles to
increase as well.
D) From Fluorine to lodine, the molecular mass increases. The
electron polarizability increases with the mass increase. In turn,
this strengthens the temporary dipole (dispersion) forces
between particles

Answers

Iodine is much more easily polarizable than fluorine therefore temporary dipoles in the molecule are strengthened.

The halogens are members of group 17 in the periodic table. They are highly electronegative and seldom occur free in nature owing to their high level of reactivity.

We know that larger molecules are more easily polarized than smaller ones. Therefore, from Fluorine to lodine, the molecular mass increases. The  electron polarizability increases with the mass increase. In turn,  this strengthens the temporary dipole (dispersion) forces  between particles. Hence the properties of halogens change smoothly down the group.

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Dont need work pls help

Answers

The answer is a low is the correct answer

Potassium sulfate has a solubility of 15g/100g water at 40 Celsius. A solution is prepared by adding 39.0g of potassium sulfate to 225g water, carefully heating the solution, and cooling it to 40 Celsius. A homogeneous solution is obtained. Is this solution saturated, unsaturated, or supersaturated? The beaker is shaken and precipitation occurs. How many grams of potassium sulfate would you except to crystallize out?please help me to understant this

Answers

Answer:

5.25 grams of potassium sulfate will get crystallize out.

Explanation:

Solubility of potassium sulfate at 40 °C = 15 g/100 g

This means that at 40 °C 15 g of potassium sulfate will get completely dissolved in 100 of water.

39.0 g of potassium sulfate to 225 g water, carefully heating the solution.

Amount of potassium sulphate will get dissolve in 225 g of water at 40 °C will be:

[tex]\frac{15g}{100g}[/tex] × 225 = 33.75g

Amount of potassium sulfate precipitated out by the solution:

= 39.0 g-33.75 g = 5.25 g

At 40 °C 5.25 g of potassium sulfate will get precipitate out from the solution which means that solution is saturated.

Saturated solution are solution in which solute is dissolved in maximum amount. Further addition of solute results in precipitation of solute form the solution.

5.25 grams of potassium sulfate will get crystallize out.

(Hope this Helps can I pls have brainlist (crown)☺️)

Mechanical waves travel fastest through
A -Solid
B -Liquid
C -Gas
D -Vacuum

Answers

Answer:

A-Solid

Explanation:

Waves travel faster in solids & slowest in gases

According to the electron configuration, which atom will be the most reactive?
1s^2 2s^2
1s^2 2s^2 2p^6 3s^2
1s^2 2s^2 2p^6 3s^2 3p^6
1s^2 2s^2 2p^6 3s^2 3p^6 4s^2

Answers

Answer:

The fourth atom.

Explanation:

Number of valence electrons in each of the four atoms:

First atom: two ([tex]2\, s^{2}[/tex].)Second atom: two ([tex]3\, s^{2}[/tex].)Third atom: eight ([tex]3\, s^{2}\; 3\, p^{6}[/tex].)Fourth atom: two ([tex]4\, s^{2}[/tex].)

Without referring to a periodic table, the first, second, and fourth atoms would all belong to the alkali-earth metal elements. The third atom would belong to a noble gas element. (The four choices are beryllium, magnesium, argon, and calcium, respectively.)

Noble gas elements are highly stable. Thus, the third atom (argon) would be the least reactive among all four choices.

On the other hand, alkali-earth metals are reactive since they tend to lose their valence electrons. The reactivity of an alkali-earth atom depends on its ionization energy (the energy required to take a valence electron away from the atom.)

Since these atoms are in the same group, ionization energy would be smaller for atoms with a larger radius. In a given group, atoms with more filled electron shells would have a larger radius.

The first atom has two filled main shells, the second has three, whereas the fourth has four.

Thus, among the three alkali-earth metals in the choices:

[tex]\begin{aligned}&\text{Number of filled electron shells:} \\ & a < b < d\end{aligned}[/tex].

[tex]\begin{aligned}&\text{Atomic radius:} \\ & a < b < d\end{aligned}[/tex].

[tex]\begin{aligned}&\text{Ionization energy:} \\ & a > b > d\end{aligned}[/tex].

[tex]\begin{aligned}&\text{Reactivity:} \\ & a < b < d\end{aligned}[/tex].

The third choice (a noble gas) is the least reactive among the four choices:

[tex]\begin{aligned}&\text{Reactivity:} \\ & c < a < b < d\end{aligned}[/tex].

Overall, the fourth choice would be the most reactive among the four choices.

The anion O3− does not obey the octet rule. Draw its Lewis structure and state the type of octet-rule exception. Indicate the values of nonzero formal charges and include lone pair electrons.

Answers

One of the oxygen atoms in the anion O3− is hypervalent and the formal charge on this oxygen atom is -1.

Ozone is a triatomic molecule. The anion formed from ozone is called the ozonide anion. This anion is also triatomic. The resonance structures of the ozonide anion are shown in the image attached to this answer.

We can see that one of the oxygen atoms in the ozonide ion is hypervalent because it contains ten instead of eight electrons. This hypervalent oxygen atom has a formal charge of -1 while the two other oxygen atoms has a formal charge of zero.

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How many grams are in 0.787 moles of kcn

Answers

Answer:

=> moles = Given mass/molar mass

=> 0.787 = Given mass/(39 + 12 + 14)

=> 0.787 = Given mass/65

=> mass = 0.787 × 65

=> mass = 51.155 g

What is the formula for sodium phosphate

Answers

Answer:

Explanation:

It''s chemical formula is Na3PO4

If the following ions Mg2+, Cl-, Sr2+, OH- are placed in a test tube, the precipitate formed is

Answers

Answer:

I am so sorry if I am wrong but my guess is no precipitate is formed.

Explanation:

If the following ions[tex]Mg^{+2}[/tex],[tex]Cl^{-}[/tex], [tex]Sr^{+2}[/tex], [tex]OH^{-}[/tex] are placed in a test tube, the precipitate formed is [tex]Mg(OH)_{2}[/tex]

What is precipitation reaction?The chemical reaction in which white color insoluble substance formed in water is called precipitation reaction.The white solid substance accumulate at the surface or separate from the reaction is called precipitate.

Why participate forms?When particular cation and particular anion in a aqueous solution combine to form an insoluble ionic solid. The reaction form precipitate or not is decide by solubility rules.

To learn more precipitate about

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why do you continuously gain exactly the amount of mass you consume with each meal

Answers

Answer:

It depends on how much the calories and fat there is in the meals and if you don't get enough physical activity of the same amount of food that you eat it can lead to weight gain

Explanation:

A balloon is partially inflated with 6.00 L of hydrogen at sea level, where the atmospheric pressure is 1.00 atm. The balloon ascends to an altitude of 1500 m, where the pressure is 0.80 atm. What is the volume of the balloon at the higher altitude if the temperature of the hydrogen doesn’t change during the ascend?

Answers

Considering the Boyle's law, the volume of the balloon at the higher altitude is 7.5 L.

The gas laws are a set of chemical and physical laws that allow determining the behavior of gases in a closed system. The parameters evaluated in these laws are pressure, volume, temperature and moles.

Boyle's law is one of the gas laws that states that the pressure of a gas in a closed container is inversely proportional to the volume of the container, when the temperature is constant. In other words, if the pressure increases, the volume decreases; while if the pressure decreases, the volume increases.

Boyle's law is expressed mathematically as:

P× V = k

In this law then two variables are related: pressure and volume, so it is assumed that the temperature of the gas and the number of molecules of the gas are constant.

Studying an initial state 1 and a final state 2 is fulfilled:

P1× V1= P2× V2

In this case, you know:

P1= 1 atmV1= 6 LP2= 0.80 atmV2= ?

Replacing:

1 atm× 6 L= 0.80 atm× V2

Solving:

[tex]V2=\frac{1 atm x 6 L}{0.80 atm}[/tex]

V2= 7.5 L

Finally, the volume of the balloon at the higher altitude is 7.5 L.

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