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Answer:

3040 mmHg

Explanation:

Here

we have to convert 4.00 atm to mmHg

As we know that

The number of atm in 1 mmHg is 0.0013157895567935

Now there is 4.00 atm So, in mmHg it would be

And, according to this, the working is given below:

= 4 ÷ 0.0013157895567935

= 3,039.99

= 3040 mmHg

Hence, the last option is correct

And, the same is relevant and considered too

B) increasesAnswer:

Explanation:

As the concentration of a KOH solution increases, the number of moles of HCl needed to neutralize the KOH solution increases. Therefore, the correct option is option B.

The World System representing Units (SI) uses a mole (symbol mol) as the unit of material amount. How many fundamental entities of a particular substance are present in an object and sample is determined by the quantity of that material. An elementary entity can be a single atom, a molecule, a pair of ions, an ion pair, even a subatomic particle like a proton depending on the makeup of the substance.

For instance, although having differing volumes and masses, ten molecules of liquid (a chemical compound) because 10 moles of mercurial (a chemical element) both have the same quantity of substance, because the mercury has exactly one atom every every molecular structure of the water. As the concentration of a KOH solution increases, the number of moles of HCl needed to neutralize the KOH solution.

Therefore, the correct option is option B.

To know more about mole, here:

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Answer:

The molarity of MgCl₂ in water is 0.088 mol/L.

Explanation:

The molarity of MgCl₂ can be calculated as follows:

[tex] C = \frac{\eta}{V} = \frac{m}{MV} [/tex]

Where:

C: is the molarity =?

η: is the number of moles of MgCl₂ = m/M

V: is the volume of water = 500 mL = 0.500 L

m: is the mass of MgCl₂ = 4.18 g

M: is the molar mass of MgCl₂ = 95.211 g/mol

Hence, the molarity is:

[tex] C = \frac{m}{MV} = \frac{4.18 g}{95.211 g/mol*0.500 L} = 0.088 mol/L [/tex]

Therefore, the molarity of MgCl₂ in water is 0.088 mol/L.

I hope it helps you!

Answer:

First Blank: 656.3 kJ

Second Blank: Endothermic

Explanation:

Edge 21'

Answer:

1.  656.3

2.  endothermic

Explanation:

Answer:

im not sure

Explanation:

Answer:

Explanation:

The two electrons in the outer orbit, together with the other negatively charged electrons, repel each other and that make the diameter of the O^2- ion larger.

Answer:

Stalagmites

Sinkholes

Stalacites

Explanation:

These features are created because the ground water dissolves solid rocks and move the solid rocks, dissolve solutions beneath the ground water gradually and therefore enlarging the cracks, which eventually form a cave. Ground water carries minerals which are then deposited and can form stalagmites or stalactites. If a stalactite and stalagmite combine together, they usually form a column.

Answer:

a,b,d

Explanation:

join monkee kind ditch humanity :D

Answer:

An F1 offspring could produce four types of gametes, RY, Ry, rY, and ry. The F2 generation supports the independent-assortment model and refutes the linkage model.

Explanation:

Answer: There are 0.499 moles present in [tex]3.01 \times 10^{23}[/tex] molecules of Boron trichloride.

Explanation:

According to mole concept, there are [tex]6.022 \times 10^{23}[/tex] molecules present in 1 mole of a substance.

Hence, number of moles present in [tex]3.01 \times 10^{23}[/tex] molecules are as follows.

[tex]Moles = \frac{3.01 \times 10^{23}}{6.022 \times 10^{23}}\\= 0.499 mol[/tex]

Thus, we can conclude that there are 0.499 moles present in [tex]3.01 \times 10^{23}[/tex] molecules of Boron trichloride.

Answer:

The energy of a wave is inversely proportional to the wavelength of the wave.

As wavelength increases, the energy of the wave decreases.

As wavelength decreases, the energy of the wave increases.

Explanation:

The energy of a wave is directly proportional to the wave's frequency. As frequency increases, so does the energy of the wave.

[tex]E\propto f[/tex] (energy [tex]E[/tex] is proportional to frequency [tex]f[/tex])

How is this related to wavelength?

Frequency is inversely proportional to wavelength. That means that as frequency increases, wavelength decreases and as frequency decreases, wavelength increases.

[tex]f\propto \frac{1}{\lambda}[/tex] (frequency [tex]f[/tex] is inversely proportional to wavelength [tex]\lambda[/tex])

Therefore, as wavelength increases, the energy of a wave decreases and as wavelength decreases, the energy of a wave increases.

[tex]E\propto f\propto \frac{1}{\lambda}[/tex]

Answer:

[tex]\boxed {\boxed {\sf x \approx 1.34 \ atm}}[/tex]

Explanation:

Since we are dealing with temperature and pressure, we must use Boyle's Law. This states that the pressure is inversely proportional to the volume. The formula is:

[tex]P_1V_1=P_2V_2[/tex]

Where P is the pressure and V is the volume.

We know the original pressure (P₁)  of the gas is 1.20 atmospheres and the volume (V₁) is 2.45 liters.

[tex]1.20 \ atm * 2.45 \ L = P_2V_2[/tex]

We also know the gas is contracted to a new volume of 2.20 liters (V₂) , but we do not know the pressure (P₂). We can use x.

[tex]1.20 \ atm *2.45 \ L = x * 2.20 \ L[/tex]

We can solve the left side of the equation and multiply.

[tex]2.94 \ atm *L= x*2.20 \ L[/tex]

We are trying to find the new pressure (x), so we must isolate the variable. It is being multiplied by 2.20 liters. The inverse of multiplication is division, so we divide both sides by 2.20 L.

[tex]\frac {2.94 \ atm *L}{2.20 \ L}=\frac{x*2.20 \ L}{2.20 \ L}[/tex]

[tex]\frac {2.94 \ atm *L}{2.20 \ L}=x[/tex]

The units of liters cancel.

[tex]\frac {2.94 \ atm}{2.20 \ }=x[/tex]

[tex]1.33636363636 \ atm =x[/tex]

The original measurements have 3 significant figures, so our answer should have the same. For the number we found, that is the hundredth place.

The 6 in the thousandth place tells us to leave the 3 in the hundredth place.

[tex]1.34 \ atm \approx x[/tex]

The new pressure is approximately 1.34 atmospheres.

Answer:

Acids have a pH less than 7. Acids contain lots of hydrogen ions

Alkalis have a pH greater than 7. Alkalis contain lots of hydroxide ions

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Answer:

ACID - A substance with particular chemical properties including turning litmus red, neutralizing alkalis, and dissolving some metals; typically, a corrosive or sour-tasting liquid of this kind. Often contrasted with alkali and base.

ALKALIS - A compound with particular chemical properties including turning litmus blue and neutralizing or effervescing with acids; typically, a caustic or corrosive substance of this kind such as lime or soda: Often contrasted with acid and base.

Hope this helps

Answer:

Molarity of 40 ml of NaoH is 0.3125 mL

Explanation:

As we know  

Molarity of acid *  volume of acid = molarity of base * volume of base

Substituting the given values, we get  

[tex]0.5 * 25 = X* 40 \\X = \frac{0.5*25}{40} \\X = 0.3125[/tex]

Molarity of 40 ml of NaoH is 0.3125 mL

Answer:

none.

Explanation:

if we are not given any value as temperature in the question. and we were asked to calculate the T1, then our T2 will be 273k.

Answer:

yes

Explanation:

Answer:

578.....882...767..86

Answer:

proton

A proton is composed of two up quarks, one down quark, and the gluons that mediate the forces "binding" them together.

Answer:

[tex]V_2=0.87L[/tex]

Explanation:

¡Hola!

En este caso, al considerar la información dada, inferimos que este problem se resuelve aplicando la ley de Charles, dado que tenemos una relación entre el volume y la temperatura:

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

Así, despejamos V2 (volumen final) y obtenemos:

[tex]V_2=\frac{V_1T_2}{T_1}\\\\V_2=\frac{0.5L*473.15K}{273.15K}\\\\V_2=0.87L[/tex]

Saludos!

Answer:

1.204 × 10^24 formula units

Explanation:

Using the following formula to convert mass of iron (III) chloride to moles;

mole = mass/molar mass

Molar mass of FeCl3 = 56 + 35.5(3)

= 56 + 106.5

= 162.5g/mol

Mole = 325/162.5

mole = 2mol

Next, to calculate the formula units of FeCl3, we multiply the number of moles of FeCl3 by Avagadro number (6.02 × 10^23)

Formula units of FeCl3 = 2 × 6.02 × 10^23

12.04 × 10^23

= 1.204 × 10^24 formula units.

Answer:

food doesn't spoil as fast when it is refrigerated because  it would be at  room temperature. Because of the lowered temperature, there are less collisions, which slows down the reaction! Due to decomposition reactions with oxygen or carbon dioxide in the air, meat begins to feel slimy and smell spoiled.  and member mark me as brainliest

Answer:

A lower temperature slows down the reactions in the food because there are less collisions. The chemical breakdowns and microorganism activity can't work as fast as it used to because of the cold.

Answer:

The picture below is an example of a food chain.

Explanation:

The bug (can't tell which one by the picture) eats the grass, the frog eats the bug, the snake eats the frog, and the eagle eats the snake.

Answer:

6.22 mol

Explanation:

I think so but I don't know just yet

sorry if im wrong

Answer:

Bases

Explanation:

Most soaps fall under the base category as they are slippery and will taste bitter if you taste it (DONT TRY IT THO).

Answer:

D. 7-methyl-3-octyne

Explanation:

1) Identify the parent chain and name it like an alkane.

• The longest chain of carbons, which consists of the functional group (which is the alkyne group in this case: C≡C).

• There are 8 carbons in the longest chain, so it is called an octane.

2) Now, identify the location of the functional group.

• The location number of the functional group should be as low as possible. Thus although we could count from the right, we start counting from the left since the functional group is closer to the left. From the left, the functional group would be at carbon 8 while from the left, it is on carbon 3.

• Replace 'ane' with 'yne' in octane for the alkyne group.

• This would give us 3-octyne.

3) Lastly, add in the name of the branch.

• Here we have one branch, -CH₃. This is read as methyl.

• Identify the location number of the branch by counting the number of carbons in the same direction as when we counted the location number of the functional group. The methyl branch has a location number of 7.

• Adding the name of the branch before the parent chain, we would arrive at 7-methyl-3-octyne as the IUPAC name of the alkyne.

Further Explanation:

A) This option is incorrect as there are only 8 carbons in the parent chain. Although there are 9 carbons in total, the 9th carbon is taken care of in '7-methyl'.

B) Location number of the functional group should be as low as possible, so start counting the number of carbons from the left!

C) Since the functional group is an alkyne, the word 'octane' should be 'octyne' instead.

Answer:

Gravity

Explanation:

Sir Isaac Newton was an English mathematician and mathematician and physicist who lived from 1642-1727. The legend is that Newton discovered Gravity when he saw a falling apple while thinking about the forces of nature.

Answer:

A. Gravity

Explanation:

because Isaac Newton published a comprehensive theory of gravity in 1687. Though others had thought about it before him, Newton was the first to create a theory that applied to all objects, large and small, using mathematics that was ahead of its time.

Answer:

1077.3 molecular in 1.05*1026 molecules

the Answer is             502 Joules

Answer:

We are to name the compound:

Assuming carbon is represented by the big gray atoms while the smaller ones represents hydrogen atoms and the the red atom represents oxygen, the chemical formula of the compound is:

CH3CH2CH2OH

Answer:

surface water

Explanation:

I hope its correct