Which compound (A,B or C) is most likely an ionic compound?

Answer:

The number of protons is equal to the number of electrons

Explanation:

For an atom to be neutral, all the charges have to equal zero. Because protons are charged +1 and electrons are charged -1, the number of protons has to be equal to the number of electrons for the charges to cancel out.

Answer:

1.46mol of Al2(SO4)3 weights 499.5 grams

Explanation:

First we will find the gram formula mass of Al2(SO4)3.

Al * 2 = 26.98 g/mol * 2 = 53.96 g

SO4 * 3 = 96.06 g/mol * 3 = 288.18

53.96 + 288.18 = 342.14 g

That is the mass of 1 mol of AL2(SO4)3.

Now we will multiply 342.14g by 1.46.

342.14 * 1.46 = 499.5244 g

Or ... 499.5 g

Answer:

it should be C

Explanation:

the top guy is right

Auroras present in polar regions.

Answer:

the Northern Lights

Explanation:

The northern lights, one of several astronomical phenomena called polar lights (aurora polaris), are shafts or curtains of colored light visible on occasion in the night sky. Aurora borealis

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Answer:

mass (m) = 900 kg, acceleration (a) = 32 m/s^2. using f=m*a, f = 900 * 32 = 28 800 newtons. power (watts)= (f * s)/t say accelerating for 1 second from rest, s= (a*t^2)/2 = 16 meters.

We have that how the titration curve of a diprotic acid differs from that of a monoprotic acid is that monoprotic acid will only have 1 equivalent point, while the diprotic acid will have 2 equivalent points.

Generally, the equation for the monoprotic acid  is mathematically given as

HA>>><<H+ + A-

While

the equation for the diprotic acid  is

H2  A>>><<H+ + HA-

HA- >>><<H+ + A2-

In conclusion, The monoprotic acid will only have 1 equivalent point, while the diprotic acid will have 2 equivalent points

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Answer:

0.03738970038

Explanation:

7.50 x 0.0049852933845157 = 0.03738970038

Electronegativity decreases because the valence electrons are farther from the nucleus. Hence, option C is correct.

Electronegativity is a chemical property that describes the tendency of an atom or a functional group to attract electrons toward itself.

From top to bottom down a group, electronegativity decreases. This is because atomic number increases down a group, and thus there is an increased distance between the valence electrons and nucleus, or a greater atomic radius.

Important exceptions to the above rules include the noble gases, lanthanides, and actinides.

Electronegativity decreases because the valence electrons are farther from the nucleus. Hence, option C is correct.

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A B & E

If you look at the balancing you'll see that C & D are balanced incorrectly.

The reactions A, B, and E follow the law of conservation of mass. So the correct options are A, B, and E.

According to the rule of conservation of mass, matter cannot be generated or destroyed in a closed or isolated system. It is preserved yet capable of changing forms.

The rule of conservation of mass, which applies to the study of chemistry, states that the mass of the reactants and products in a chemical reaction must be equal.

To be clear: A system that is isolated from its environment is one that does not interact with it. As a result, no matter what changes or chemical reactions take place in that isolated system, the mass will remain constant; even if the final state may differ from the initial state, there can be no more or less mass than there was before the change or reaction.

Therefore the correct options are A, B, and E.

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Answer:

It is a heterogeneous mixture

Answer: 43

Explanation:

Answer:

Zinc-64: Number of protons is 30. Number of neutrons 34.

Zinc-66: Number of protons is 30. Number of neutrons 36.

Explanation:

The atomic number of Zinc is 30, so in every Zinc atom, regardless of whether it's an isotope or not, will always have 30 protons.

The atomic number of an equivalent to the number of protons, and never changes.

The isotope number is the sum of the protons and neutrons in the nucleus.

Isotope number = atomic number + neutrons

So if we have 30 protons, and we're trying to find the number of neutrons in Zinc-64 we just subtract 30 from 64.

64 - 30 = 34

So now we know that there are 34 neutrons in Zinc-64

Same thing goes for Zinc-66.

66 - 30 = 36

There are 36 neutrons in Zinc-66.

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Answer:

flow of electrons between the electrolytes and the electrodes

The anser is by making the bill have tall the things that a normal bill has. the invisiable line in the middle. the invisible ben franklin and the 50

The mass of produced silver from the reaction is 107.9 grams.

Mass of any substance will be calulated by using the moles of that substance as:

n = W/M, where

W = required mass

M = molar mass

Givem chemical reaction is:
Cu + 2AgNO₃ → Cu(NO₃)₂ + 2Ag

Moles of 31.75g of Cu = 31.75g / 63.5g/mol = 0.5 mole

From the stoichiometry of the reaction, it is clear that:

1 mole of Cu = produced 2 moles of Ag

0.5 mole of Cu = produced 2×0.5=1 mole of Ag

Now we calculate the mass of Ag from given moles as:

W = 1mol × 107.9g/mol = 107.9g

Hence correct option is (2).

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It is Free radicals

Answer:

Its Free Radicals

Explanation:

You're Welcome

Answer:

Similar to the movement of a pendulum, an enormous wrecking ball when held at a height possesses potential energy, and as it falls, its potential energy is converted to kinetic energy. As the wrecking ball makes contact with the structure to be destroyed, it transfers that energy to flatten or take down the structure.

Explanation:

I hope this helps :)

Answer:

the speed and wavelength of light are reduced , although the frequency remains unaltered.

The speed of light on the vacuum is equal to 3 ×10⁸m/s. The speed of light changes as it enters a different medium due to refraction.

Refraction of light can be described as the redirection of a light ray traveling from one optical medium to another optical medium. The redirection is caused by a change in speed with a change in the medium. Refraction of light can be described as an observed phenomenon, but sound waves and water also experience refraction.

Refraction follows Snell's law, which can be described as the ratio of the sines of the angle of incidence and angle of refraction should be equal to the ratio of the refractive indices of the two different mediums.

When light travels from a less dense to a denser medium, then the refracted ray bends towards the normal. The angle of incidence of the light ray will be greater than the angle of refraction.

If a light ray travels from a denser to a rarer medium, then it will bend away from the normal and the angle of incidence will be less than the angle of refraction.

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Considering the Dalton's partial pressure, the partial pressure of nitrogen in the tank is 41 atm.

The pressure exerted by a particular gas in a mixture is known as its partial pressure.

So, Dalton's law states that the total pressure of a gas mixture is equal to the sum of the pressures that each gas would exert if it were alone:

[tex]P_{T} =P_{1} +P_{2} +P_{3} + ... +P_{n}[/tex]

where n is the amount of gases present in the mixture.

This relationship is due to the assumption that there are no attractive forces between the gases.

In summary, the total pressure in a mixture of gases is equal to the sum of partial pressures of each gas.

In this case, the total pressure of the gas mixture is calculated as:

[tex]P_{T} =P_{oxygen} +P_{helium} +P_{nitrogen}[/tex]

You know that:

Replacing in the expression for the total pressure:

[tex]180 atm=81 atm+58 atm+P_{nitrogen}[/tex]

Solving:

180 atm -81 atm -58 atm= [tex]P_{nitrogen}[/tex]

41 atm= [tex]P_{nitrogen}[/tex]

Finally, the partial pressure of nitrogen in the tank is 41 atm.

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Answer:

4,256

if not that then 42,560

Explanation:

It's too short. Write at least 20 characters to explain it well.

Your answer can't be empty

Answer:

In 11.5 g of sodium, there are 0.5 moles.

Explanation:

Answer:

11) time

9) a projectile

5) Greater than vx

13)

Answer:

No

Explanation:

This is velocity time graph .

See the change between D and E(F is not given).

For a series of weak acids, the increase in pKa means that the conjugate bases become more stable.

The term pKa refers to the negative logarithm of the acid dissociation constant. This is a constant that shows the extent to which an acid is dissociated in solution.

As the pKa of a series of  weak acids increases, the conjugate bases become more stable.

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Answer:

1.potential

2. Kinetic

3. Potential

4. I think is potential because it is storing the energy but if is a crank flashlight it is kinetic.

Explanation:

Answer:

[tex]\huge\boxed{\sf 49.41\ L}[/tex]

Explanation:

In the reaction:

for every 3 moles of H₂, 2 moles of NH₃ are produced.

Converting 25 g of Ammonia into moles:

Moles = mass / molar mass

= 25 / (14 + 1 × 3)

= 25 / (14 + 3)

= 25 / 17

= 1.47 mol

From the reaction:

2 NH₃ = 3 H₂

1 NH₃ = 3/2 H₂

1 NH₃ = 1.5 H₂

1.47 mol of NH₃ = 1.5 × 1.47 mol of H₂

1.47 mol of NH₃ = 2.2 mol of H₂

So, 2.2 mol of H₂ are needed to produce 1.47 mol (25 g) of NH₃

Converting 2.2 mol of H₂ into L:

= mole × molar value

[molar value = 22.4 L/mol]

= 2.2 × 22.4

= 49.41 L

[tex]\rule[224]{225}{2}[/tex]

Answer:

It is reactive because it has to gain an electron to have a full outermost energy level.

Explanation:

The electron configuration of oxygen is 1s2,2s2 2p4.

Oxygen is in group six in the periodic table so it has six electrons in its valence shell. This means that it needs to gain two electrons to obey the octet rule and have a full outer shell of electrons (eight).