How many molecules of acetylene, C2H4, are there in 2.00 moles acetylene?

Answer:

1. C

2. B

3. B

4. Graph b, option D

Explanation:

Answer:

11. chloroplasts and a cell wall

17. microbes

1. increased

2. Graph b

Explanation:

I put them in the order u asked the questions btw.

Answer:

2 experimental

Explanation:

Answer

Rise: The kingdom of D'mt populated the majority of the Northern horn which had developed much agriculture and expansion of trade with other empires like Egypt. After the fall of the D'mt kingdom many small kingdoms took its place and slowly came together as one large kingdom called, Aksum. Aksum rose to power in the first century after the son of a Solomon queen had expanded to the land near the red sea.

Fall: The empire had become isolated from civilizations when it came to trade after battling Arabian armies. Their religion segregated them and caused the downfall of their power over the trading ports on the Red Sea.

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I think it's 80 . 12

pls tell me if correct

Answer:

Explanation:

Atoms are neutral; they contain the same number of protons as electrons. A neutral sodium atom, for example, contains 11 protons and 11 electrons. Atoms that gain extra electrons become negatively charged.

Answer:

Electron

Explanation:

Answer: Gasoline

Explanation: Siri said so

The non-aqueous means it does not contain water. Among the given options gasoline is an example of a non-aqueous solution. The correct option is A.

The solution which is obtained by dissolving solute in any liquid other than water is defined as the non-aqueous solution. If solute is dissolved in solvent like benzene, alcohol, ether, carbon disulphide, acetone etc. forms a non aqueous solution.

The major difference between the aqueous and non-aqueous solution is that the solvent of an aqueous solution is water whereas in non-aqueous solutions, the solvent is any substance other than water.

The solvent of non-aqueous solution can be polar or nonpolar and depending on the polarity the solutes dissolve in the solvent. Here gasoline is an example of the non-aqueous solution. The gasoline is a crude oil which does not include water as an ingredient.

Thus the correct option is A.

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Answer:

[tex]fro \: the \: equation : \\ 6 \: moles \: of \: nitric \: acid \: produce \: 2 \: moles \: of \: water \\ 1.1 \: moles \: of \: nitric \: acid \: react \: with \: ( \frac{1.1}{6} \times 2) \: moles \\ = 0.367 \: moles \: of \: water \\ 1 \: mole \: of \: water \: weighe \: 18 \: g \\ 0.367 \: moles \: will \: weigh \: ( 0.367 \times 18) \: g \\ = 6.6 \: g \: of \: water[/tex]

Answer:

22.2 g of MgF₂

Explanation:

We star from the reaction:

NaF → sodium fluoride

Mg → Magnesium

2NaF  +  Mg →  MgF₂  +  2Na

2 moles of sodium fluoride react to 1 mol of Mg in order to produce 1 mol of magnesium fluoride and 2 moles of sodium.

We convert mass of the reactant to moles:

30 g . 1mol / 41.98 g = 0.715 mol

We assume that Mg is in excess

As ratio is 2:1, if we have 0.715 moles of NaF we may produce the half of moles, of MgF₂

0.715 mol /2 = 0.357 moles of MgF₂

We convert moles to mass: 0.357 mol . 62.30g /mol = 22.2 g

Answer:

[tex]4.08x10^{25} molecules[/tex]

Explanation:

Hello there!

In this case, since the understanding of the mole-molecules relationships is analyzed via the Avogadro's number:

[tex]1mol=6.022x10^{23}molecules[/tex]

Next, we can solve the following setup by starting with the 67.8 moles of helium and obtaining the required molecules as follows:

[tex]67.8mol*\frac{6.022x10^{23}molecules}{1mol}\\\\=4.08x10^{25} molecules[/tex]

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Answer:

A.

Explanation:

This is the closest to what Ptolemy drew.

B would have the sun and moon in equal orbits, but the moon changes wouldn't be accounted for

C and D have the sun in the middle, so they are both heliocentric.

The diagram that correctly shows the orbits of the Sun, Earth, and Moon in the geocentric model of the solar system is A and the correct option is option A.

In the geocentric model of the solar system, the Earth is considered to be the center of the solar system.

The Moon, the planets, the Sun, and the stars all rotate around the Earth (which stays still), with uniform circular motion. They compose the heavens, which are considered to be ethereal and unchanging.

Therefore, the diagram that correctly shows the orbits of the Sun, Earth, and Moon in the geocentric model of the solar system is A and the correct option is option A.

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Answer:

Greenhouse gases in the atmosphere absorb heat radiation. Human activity has increased greenhouse gases in the atmosphere since the Industrial Revolution, leading to more heat retention and an increase in surface temperatures.

Answer:

k

Explanation:

that is shide rong and shide right

Answer:

Tbe reddish brown substance might be the rust that formed overtime in a iron tap and over the course of time mixed with other dust and particles it might have formed another substance .

The reddish brown substance is iron oxide which is formed by the reaction of iron materials with water and air. This oxide layer above the surface of metallic parts is called rust.

The Fe is a reddish metal more reactive towards the air and water as well. Fe is a very common in the manufacturing of many household materials. However, by the action of air and water these metallic parts undergo corrosion.

Corrosion is a chemical change involving the formation of oxide layer over the metallic surface which eventually corrode the substance and make it unusable.

Fe reacts with oxygen of water or air forming the reddish brown iron oxide Fe₂O₃ that is what called the rust. Rust can be seen in needles, vehicle parts made of iron etc.

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Answer:

83.33 m/s^2

Explanation:

Acceleration is defined as the rate of change of velocity.

So if we know that at the beginning an object has a velocity V1.

And after a time T, the object has a velocity V2, then the average acceleration in that time interval can be calculated as:

A = (V2 - V1)/T

In this case, we know that the initial speed was 5,000 m/s

And after a time of 60 s, the velocity is 10,000 m/s

Then we have:

V1 = 5,000 m/s

T = 60s

V2 = 10,000 m/s

Then the average acceleration is:

A = (10,000 m/s - 5,000 m/s)/60s = 83.33 m/s^2

Answer:

2.25 moles H2

Explanation:

The equation N2+ 3H2 > 2NH3

1 mol of N2 gives 3 mol of H2

Then

. 75 mole N2 give 3*.75 = 2.25 moles of H2

Answer:

[tex]\boxed {\boxed {\sf 3.1 \ liters}}[/tex]

Explanation:

This question asks us to find the new volume if the pressure changes. Therefore, we use Boyle's Law, which states that pressure and the volume of the gas are inversely proportional. The formula is:

[tex]P_1V_1=P_2V_2[/tex]

We know that the original sample of gas occupies 4.5 liters at a pressure of 1.63 atmospheres.  We know that the pressure was changed to 2.4 atmospheres, but we don't know the volume. Substitute all known values into the formula.

[tex]4.5 \ L * 1.63 \ atm= 2.4 \ atm * V_2[/tex]

Since we are solving for the new volume (V₂), we need to isolate the variable. It is being multiplied by 2.4 atmospheres and the inverse of multiplication is division. Divide both sides by 2.4 atm.

[tex]\frac {4.5 \ L * 1.63 \ atm}{2.4 \ atm}= \frac{2.4 \ atm * V_2}{2.4 \ atm}[/tex]

[tex]\frac {4.5 \ L * 1.63 \ atm}{2.4 \ atm}= V_2[/tex]

The units of atmospheres (atm) cancel.

[tex]\frac {4.5 \ L * 1.63 }{2.4 }=V_2[/tex]

[tex]\frac {7.335 \ L}{2.4 }=V_2[/tex]

[tex]3.05625 \ L= V_2[/tex]

The smallest number of significant figures in the original measurements is 2, so our answer must have the same. For the number we found, that is the tenths place.

The 5 in the hundredth place tells us to round the 0 up to a 1.

[tex]3.1 \ L = V_2[/tex]

The volume of the neon gas when the pressure is changed to 2.4 atmospheres is 3.1 Liters.

Explanation:

[tex]P1V1 = P2V2[/tex]

[tex]P1=1.63atm

\\ V1=4.5 L

\\ P2=2.4 atm

\\ V2=?[/tex]

[tex]V2 = \frac{1.63 \times 4.5}{2.4} [/tex]

[tex]V2 = 3.05625 \: Litres[/tex]

Answer: increasing the positive charge of the positively charged object and increasing the negative charge of the negatively charged object.

Explanation:

edge

Answer:

Your answer is A.

Explanation:

Answer:

computers

Explanation:

Answer:

[tex]x_{SO_3}=0.82\\\\x_{SO_2} =0.18\\[/tex]

Explanation:

Hello there!

In this case, according to the given information, it is possible for us to solve this problem by using the Dalton's law which allows us to calculate the mole fractions by dividing the partial pressures over the total pressure. In such a way, we plug in the given pressures of sulfur trioxide (SO3) and sulfur dioxide (SO2) to obtain:

[tex]x_{SO_3}=\frac{1.45atm}{1.45atm+0.32atm} =0.82\\\\x_{SO_2}=\frac{0.32atm}{1.45atm+0.32atm} =0.18\\[/tex]

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