Two substances both exhibit hydrogen bonding Substance A has a boiling point of 78.4°C. Substance B has a boiling point of
100°C. Which statement correctly compares the substances? (1 point)
O Substance A has stronger bonds, and it takes less energy to undergo a phase change.
O Substance B has stronger bonds, and it takes less energy to undergo a phase change.
O Substance B has stronger bonds, and it takes more energy to undergo a phase change.
O Substance A has stronger bonds, and it takes more energy to undergo a phase change.

The number of grams present in 0.025 mole of Demerol hydrochloride is 7.094 grams.

It is a drug used in treating severe or moderate pain.

The moles are given = 0.025

The formula is C₁₅H₂₂CINO₂

The elements that present are C, H, Cl, N, O.

The molecular weight are given:

Carbon: 12.0107

Hydrogen: 1.00784

Chlorine: 35.453

Nitrogen: 14.007

Oxygen: 15.999

Multiply the molecular weight with moles and add them

(15 x 12.0107) + (22 x 1.00784) + (1 x 35.453) + (1 x 14.007) + (2 x 15.999) = 283.79098 grams per mole.

Now, multiply the number of moles given with the total molecular weight

283.79098 x 0.025 = 7.094

Thus, the number of grams are 7.094.

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The molecule is stable and can exist even though the number of valence electrons around central atom in the molecule are less than 8.

BF3 molecule is a stable molecule because all the electrons present in the outermost shell of boron are covalently bonded with fluorine. Boron in BF3, three bonds is the maximum possible because boron only has 3 electrons to share.

So we can conclude that the molecule is stable and can exist even though the number of valence electrons around central atom in the molecule are less than 8.

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Answer:

I believe it is useful as it shows how electrons are distributed in the shells (energy levels) of an iron atom. An atom is the smallest particle of an element that can take part in a chemical reaction. It contains the nucleus and the shells (energy levels). the nucleus contains protons and neutrons while the shells contain electrons.

Explanation:

Answer: Decomposition

Explanation:

Answer: C

Explanation:

This is a fact.

eimetchuinsumuleavtubronAnswer:

Explanation:

Give the positional isomers of 2 halopropane

(CH3)2CH​

answer:

    is in file download it

Answer:

4.041 moles C₂H₆

Explanation:

To convert from grams to moles, you first need to determine the molar mass of C₂H₆. The molar mass is the combination of the atomic masses times the quantity of each element present in the molecule. The atomic masses usually be found on the periodic table. They represent how much the element weighs per one mole.

Carbon (C) Atomic Mass: 12.01 g/mol

Hydrogen (H) Atomic Mass: 1.008 g/mol

Molar Mass (C₂H₆): 2(12.01 g/mol) + 6(1.008 g/mol)

Molar Mass (C₂H₆): 30.068 g/mol

Now that you have the molar mass, you can multiply this ratio to the given value. Keep in mind that in order to go from grams to moles, the numerical value should be place in the denominator of the molar mass ratio. This allows for the cancellation of the unit 'grams'. The final answer should have 4 significant figures because the given value also has 4 sig figs.

121.5 grams C₂H₆              1 mole
--------------------------  x  ------------------------  =  4.041 moles C₂H₆
                                     30.068 grams

The number of atoms present in 0.58 mole of magnesium, Mg is 3.49×10²³ atoms

1 mole of Mg = 6.02×10²³ atoms

1 mole of Mg = 6.02×10²³ atoms

Therefore,

0.58 mole of Mg = 0.58 × 6.02×10²³

0.58 mole of Mg = 3.49×10²³ atoms

Thus, 3.49×10²³ atoms are present in 0.58 mole of Mg

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An unsaturated solution is formed when 25g of NaCI are dissolved in 100g of water at 30 degrees Celsius.

A solution is formed as a result of the dissolution of a solute in a solvent.

However, based on the capacity of the solvent to take in more solute, a solution can be of three types namely;

An unsaturated solution is a solution whose solvent can dissolve more solute at a particular temperature.

According to this question, 25g of NaCI are dissolved in 100g of water at 30°C, hence, the solvent can take in more solute at 30°C.

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Find pH of all

#A

pH=-log[H+]

#B

#C

pOH=-log[OH]

pH=

#4

pH

So our answers

the cut pieces will have their own north and south pole

Answer:

194.73 K

Explanation:

Use the Ideal Gas Law:    PV = n RT

   R = .082057366  L Atm / k-mole

2 moles Argon weigh in at 79.896 gm

  79.896 gm / 5 gm/L = 15.9792 Liters

Ideal Gas Law:

(2)(15.9792) = 2 (.082057366) ( K)

194.73 K

Considering 2.00 moles of Argon, an ideal gas, at a density of 5.00 g/L and a pressure of 2.00 atm, the closest value to the temperature of the gas is approximately 39.01 K.

To find the temperature of the gas, we can use the ideal gas law equation:

PV = nRT

In this formula:

P = pressure (in atm)

V = volume (in L)

n = number of moles

R = ideal gas constant (0.0821 L·atm/mol·K)

T = temperature (in K)

Here it is given that:

P = 2.00 atm

V = 1 L

n = 2.00 moles

R = 0.0821 L·atm/mol·K

Now we can rearrange the equation to solve for T:

T = PV / (nR)

Substitute the given values:

T = (2.00 atm) x (16.00 L) ÷ (2.00 moles x 0.0821 L·atm/mol·K)

Calculate:

T ≈ 39.01 K

Thus, the closest value to the temperature of the gas is approximately 39.01 K.

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When the temperature and the volume of the gas stored in the container are high then the number of the moles will be measured accurately. Thus, options A and B are correct.

The ideal gas law is the establishment of the relation between the elements like the moles, pressure, temperature, and the volume of the gas containing the particle.

The ideal gas states:

PV = nRT

With an increase in the temperature, the number of particles that collides increases as the kinetic energy increases. The particle of the container is more when the volume of the gas is more.

Therefore, in options A and B high temperature and volume increase the accuracy.

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The weather station is a place which contain instrument that collect data of atmospheric pressure, wind, humidity, etc to forecast weather. The weather station is powered by solar power.

A weather station is a place that measure atmospheric conditions, on the basis of temp., pressure, wind speed, etc conditions.

They can be based either in land or sea. They are necessary to forecast any disaster, so we can prepare for the disaster.

Thus, the weather station is a place which contain instrument that collect data of atmospheric pressure, wind, humidity, etc to forecast weather. The weather station is powered by solar power.

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Answer:

Light and sound both are waves, but sound requires a material medium to travel, and hence cannot travel in empty space while light can travel through vacuum but not through opaque materials. Both undergo refraction, diffraction and interference.

Explanation:

Answer:

6.850767 grams is the answer

[tex]0.987 ~ \text{moles of Li} = 0.987 \times \text{Molar mass of Li}\\\\~~~~~~~~~~~~~~~~~~~~~~~=0.987 \times 6.941~ g\\\\~~~~~~~~~~~~~~~~~~~~~~~=6.850767~ g[/tex]

Answer:

the element air is the most similar to oxygen in chemical. and physical properties

There are three number of electrons lost by 1 mole of aluminium because aluminum has +3 charge on it.

When an atom loses electron, positive charge appears on the atom this is called cation. In this reaction we can see that aluminium has +3 charge which means that it loses 3 electrons.

So we can conclude that There are three number of electrons lost by 1 mole of aluminium because aluminum has +3 charge on it.

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Answer:

See below

Explanation:

Boiling point of water is 100 C

 this substance is higher boiling point and the molecules are likely with higher e-static forces

The unknown substance has a higher boiling point than water, and it has stronger electrostatic forces between its molecules than water. Therefore, option B is correct.

Boiling point is a measure of the temperature at which a substance changes from a liquid to a gas phase. Substances with higher boiling points generally have stronger intermolecular forces, such as hydrogen bonding or stronger dipole-dipole interactions.

Since the boiling point of the unknown substance is higher than that of water (which boils at 100°C), it suggests that the unknown substance likely has stronger electrostatic forces between its molecules compared to water.

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Answer: 3. Mass is lost due to the conversion of mass to energy.

The number of moles of Cr deposited by 1.5 F of electricity is 0.5 moles

The term electrolysis has to do with thee deposition of a solid when a direct current is passed through its solution.

Given the reaction;  Cr3+(aq)  + 3e ––›Cr(s)

If 3F of electricity is required to deposit  1 mole of Cr

1.5F of electricity is required to deposit  1.5F * 1 mole/3F

= 0.5 moles

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Answer:

c. one must have a higher kinetic energy than the other system

Answer:

hot

Explanation:

You'll need to boil the solution, though, to reduce the amount of water so that it is concentrated enough to form crystals. Cook your solution over low to medium heat for about an hour. You want to reduce it down to 1 cup or less.

Answer:

there are 310.64 grams in 9.40×10²⁵ molecules of H₂.

Explanation:

Amount of moles of H₂= (9.6 × 10²⁵ atoms × 1 mole) ÷ 6.023 × 10²³ atoms

amount of moles of H₂ = 155.32 moles

On the other hand, molar mass is the amount of mass that a substance contains in one mole. In this case, the molar mass of H₂ is 2 .

Then the mass that 155.32 mole of compound contains is calculated as:

155.32 moles × 2 = 310.64 grams

Finally, there are 310.64 grams in 9.40×10²⁵ molecules of H₂.

Moles of H_2

[tex]\\ \rm\Rrightarrow \dfrac{No\:of\: molecules}{Avagadro\:no}[/tex]

[tex]\\ \rm\Rrightarrow \dfrac{9.6\times 10^{25}}{6.023\times 10^{23}}[/tex]

[tex]\\ \rm\Rrightarrow 1.594\times 10^{2}[/tex]

[tex]\\ \rm\Rrightarrow 159.39mol[/tex]

Mass

[tex]\\ \rm\Rrightarrow Moles\times molar\:mass[/tex]

[tex]\\ \rm\Rrightarrow 159.39(2)[/tex]

[tex]\\ \rm\Rrightarrow 318.78g[/tex]

Answer:

Hope this helps kinda got confused mid way

Explanation:

So the hydrogen sulphide is H2S for the molecular formula. Then the mass of hydrogen sulphide would be 1×2+32= 34g/mol At STP.

They are able to find out more organisms which are present at the bottom of the sea due to their accomplishment.

This information can be used to help the Australian Institute of Marine Biology further to understand the environment of the ocean floor because they are able to see the seas floor and can find out other creatures as well.

So we can conclude that they are able to find out more organisms which are present at the bottom of the sea due to their accomplishment.

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Answer:

because cotton have a good absorbing quality and can absorb water more which is used to mop the floor

Explanation: