The atomic weight of nitrogen is what ?

The pressure in atm exerted by 1 mole of methane placed into a bulb with a volume of 244.6 mL at 25°C is 101.94atm.

The pressure of an ideal gas can be calculated using the following formula:

PV = nRT

Where;

According to information in this question;

P × 0.24 = 1 × 0.0821 × 298

0.24P = 24.47

P = 24.47/0.24

P = 101.94atm

Therefore, the pressure in atm exerted by 1 mole of methane placed into a bulb with a volume of 244.6 mL at 25°C is 101.94atm.

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Answer:

The the salt dissolves

Explanation:

The salt dissolves because the covalent bonds of water are stronger than the ionic bonds in the salt molecules.

Answer:

b) potential energy is stored in an object, and kinetic energy is released mechanical energy that causes motion.

Explanation:

potential energy is stored because it is the possible energy of an object if a force is acted upon it. on the other hand, kinetic energy is essentially when potential energy is being acted upon or changed.

Answer: The second option

Explanation: For example, if a ball is sitting at the top of a hill, it has a lot of potential energy. If it then falls off, potential energy will turn into kinetic energy and the ball will roll down the hill.

2.9 L of oxygen are required to react with 5.8 L of hydrogen at STP to form water.

Hydrogen gas and oxygen gas combines in a molar volume ratio of 2 : 1 to form water.

The equation of the reaction is given as follows:

Thus, twice the volume of hydrogen is required with a given volume of oxygen to form water.

If 5.8 L of hydrogen is available for reaction at STP, the volume of oxygen required all be half of 5.8 L.

Volume of oxygen required = 5.8 / 2 = 2.9 L

Therefore, 2.9 L of oxygen are required to react with 5.8 L of hydrogen at STP to form water.

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Explanation:

The intermolecular forces present in the bonding of CH₃F are dipole-dipole interactions and London dispersion forces.

1.) No, CH₃F does not exhibit hydrogen bonding. Hydrogen bonding occurs when a hydrogen atom is bonded to a highly electronegative atom such as fluorine, oxygen, or nitrogen. In CH₃F, the hydrogen atom is bonded to carbon, which is not highly electronegative.

2.) Yes, CH₃F exhibits dipole-dipole interactions. Dipole-dipole interactions occur between molecules that have permanent dipoles due to the electronegativity difference between the atoms. In CH₃F, the fluorine atom is more electronegative than the carbon and hydrogen atoms, resulting in a polar molecule with a permanent dipole moment.

3.) Yes, CH₃F exhibits London dispersion forces. London's dispersion forces, also known as Van der Waals forces, are present in all molecules and arise from temporary fluctuations in electron distribution. Although CH₃F has dipole-dipole interactions, it also experiences London dispersion forces due to the temporary shifts in electron density.

Hence, the bonding in CH₃F was explained above.

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Answer:

If temperature stays the same, the amount of carbon dioxide dissolved in the ocean would increase.

Explanation:

The carbon dioxide in the air ([tex]{\rm CO_{2}}\, (g)[/tex]) and the carbon dioxide dissolved in the ocean ([tex]{\rm CO_{2}}\, (aq)[/tex]) are in a solution equilibrium:

[tex]{\rm CO_{2}}\, (g) \rightleftharpoons {\rm CO_{2}}\, (aq)[/tex].

Assume that the concentration of carbon dioxide in the air ([tex]{\rm CO_{2}}\, (g)[/tex]) increased while temperature stayed the same.

By Le Ch[tex]^{}[/tex]atelier's Principle, the solution equilibrium [tex]{\rm CO_{2}}\, (g) \rightleftharpoons {\rm CO_{2}}\, (aq)[/tex] would shift to offset this increase in [tex]{\rm CO_{2}}\, (g)[/tex] concentration. Specifically, this equilibrium would reduce the amont of [tex]{\rm CO_{2}}\, (g)\![/tex] in the system by converting more atmospheric [tex]{\rm CO_{2}}\, (g)\!\![/tex] to [tex]{\rm CO_{2}}\, (aq)\![/tex] dissolved in the ocean. Therefore, the concentration of [tex]{\rm CO_{2}}\, (aq)\!\![/tex] dissolved in the ocean would increase.

Answer:

b

Explanation:

Answer:

1. The combined number of protons and neutrons remains constant.

2. There are two atoms with mass numbers of 2.

3. It is the number of protons plus neutrons.

4. A nucleus with a greater mass than any of the reactants will be produced.

5. Fusion reactions in the sun convert small amounts of matter into large amounts of energy.

Explanation: I couldn't see the comments so I guess some ppl can't either but here you go got them all correct! :)

Th sun produces energy through fusion reaction by converting small amount of matter into larger amounts of energy.

The sun is able to produce energy because protons of hydrogen atoms present in the sun collide violently in the sun's core and fuse together leading to the formation helium atom.

This process of fussion is referred to as a PP (proton-proton) chain reaction, and it emits an enormous amount of energy

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Answer:

D

Explanation:

if you observe a first quarter on January 3, the date will you see a full moon is on February 1st.

The lunar phase during which the Moon is completely illuminated from Earth's perspective is known as the full moon. When Earth is situated halfway between the Sun and the Moon, this happens. This indicates that the near side of the moon, which faces Earth, is fully illuminated by the sun and appears as a roughly circular disk.

The Moon is a symbol for both the emotional and physical bodies. The full Moon is a time to be open and receive the spirit's light and awareness into your physical, emotional, and mental bodies

It takes 29 day, to get to the full moon. This will be:

= January 3 + 29 days

= February 1st

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Answer:

Without taking body measurements, the fabric material can run out of supply if the tailor uses it too much. And more material is required to fix small dresses or suits. So when body measurements are taken accurately, the tailor will know the exact amount of material to be used.

Explanation:

Answer:

It is called the Random Walk, where the next move (as seen through the motion of gas particles) depends on chance.

Explanation:

Answer:

molecular mass of each substance

molecular mass of each substance

Explanation:

Answer:

c. pH=-log[H+]

Explanation:

pH=-log10[H+]

Quartz is not regarded as an example of a modified silicate.

This is defined as a hard, crystalline mineral composed of silica with a tetrahedral shape. Silica is also referred to as Silicon dioxide(SiO₂).

This type of mineral is a naturally occurring crystal and isn't a modified silicate but the rest can be modified using their respective constituents thereby making option D the most appropriate choice.

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The ratio of moles of AI(NO3)3 to moles Na2CO3 in the reaction is 2:3

In the reaction 2 moles of AI(NO3)3 reacted with 3 moles Na2CO3 so the ratio of the moles is 2 is to 3 represented as 2:3

hope it helps

Answer:

Niche.

A niche is a place where an organism lives at a given time or how the organism lives there.

Answer:

A. Rubidium and phosphorus react to form rubidium phosphide

Explanation:

P is not potassuim. It is phosporous. So A is the only correct choice.

Answer:

Socratic app

Explanation:

it will help you

The freezing points of each of the solutions are as follows;

0.100 m K2S -   - 0.558oC

21.5 g of CuCl2 in 4.50 * 102 g water -   -2oC

5.5% NaNO3 by mass (in water)​ -     - 2.6oC

The freezing point is the point at which liquid changes to solid. Let us now look at the freezing point of each solution.

a)

Since;

ΔT = K m i

K = 1.86 oC m-1

m = 0.100 m

i = 3

ΔT =   1.86 oC m-1 * 0.100 m * 3 = 0.558oC

Freezing point = 0oC - 0.558oC =  - 0.558oC

b) Number of moles of CuCl2 = 21.5 g/134.45 g/mol = 0.16 moles

molality = 0.16 moles/0.45 Kg = 0.36 m

ΔT = K m i

ΔT =  1.86 oC m-1 * 0.36 m * 3 = 2oC

Freezing point = 0oC - 2 = -2oC

c) Number of moles of NaNO3 = 5.5g/85 g/mol = 0.065 moles

molality of the solution =  0.065 moles/0.0945 Kg = 0.69 m

ΔT =  1.86 oC m-1 * 0.69 m * 2 = 2.6oC

Freezing point = 0oC - 2.6oC = - 2.6oC

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Intensive properties do not change as the size of an object changes but Extensive properties change as the size of an object changes; here the properties can not change because the amount of the water stays the same

The physical properties of matter can be divided into  intensive and extensive properties and the terms are introduced in 1917 by Richard C Tolman.

Intensive properties are independent of the presence of number of substance and they are bulk properties, here the Characteristic doesn’t change.

The size of intensive properties cannot change, examples are Density, temperature, pressure etc. It can not depend on the amount of matter and also intensive properties are fixed, countable.

Extensive properties are dependent on the presence of  number of substance, easily identified, Size of Extensive properties changes and  It can be computed.

extensive properties depend on the amount of matter, often changes and are not countable; For example Volume, size, mass, length, weight

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Answer:

nose

Explanation:

xde

Answer:

Hydrogen is neither an alkali metal or halogen.

Explanation:

It has the properties of both groups and so it's position is uncertain.

Answer:

2HBr(aq) + MgS(s) → MgBr2(aq) + H2S(g)

excess

Sulfide ion in solution exists as HS-. Adding additional H+ forces it to H2S gas.

H2S(g) <=> H+(aq) + HS-(aq)

A complete ionic equation also contains the spectator ions, whereas a net ionic equation just displays the chemical species that are involved in a reaction. when MgCO₃ (s) and excess HCl (aq) are combined, the equation becomes MgCO₃ (s) + 2H⁺ (aq) → Mg²⁺ (aq) + H₂O (l) + CO₂ (g).

The chemical species that change chemically are identified by the net ionic equation. The ions that show up on both sides of the equation are stable and are therefore referred to be spectator ions.

Spectator ions are ions that are present on both sides of chemical reactions but do not take part in the reaction itself. The spectator ions on both sides of the equation are canceled in the net chemical reaction.

The complete ionic equation is:

MgCO₃ (s) + 2H⁺ (aq) + 2Cl⁻ (aq) → Mg²⁺ (aq) + 2Cl⁻ (aq) + H₂O (l) + CO₂ (g)

The net ionic equation is:

MgCO₃ (s) + 2H⁺ (aq) → Mg²⁺ (aq) + H₂O (l) + CO₂ (g)

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Answer:

p2 = .75 atm

Explanation:

p1 v1  = p2 v2

5 * 1.5  = p2 10    

Answer:

2kci,3H12,702,c02g k 4 t v6vuvi

Answer:

The given reaction is a combustion reaction of benzene,

C

6

H

6

. From its balanced chemical equation,

2

C

6

H

6

+

15

O

2

→

12

C

O

2

+

6

H

2

O

,

the mass of carbon dioxide

(

C

O

2

)

produced from 20 grams (g) of

C

6

H

6

is determined through the molar mass of the two compounds, given by,

M

M

C

O

2

=

44.01

g

/

m

o

l

M

M

C

6

H

6

=

78.11

g

/

m

o

l

and their mole ratio:

12

m

o

l

C

O

2

2

m

o

l

C

6

H

6

→

6

m

o

l

C

O

2

1

m

o

l

C

6

H

6

With this,

m

a

s

s

o

f

C

O

2

=

(

20

g

C

6

H

6

)

(

1

m

o

l

C

6

H

6

78.11

g

C

6

H

6

)

(

6

m

o

l

C

O

2

1

m

o

l

C

6

H

6

)

(

44.01

g

C

O

2

1

m

o

l

C

O

2

)

=

(

20

)

(

6

)

(

44.01

)

g

C

O

2

78.11

=

5281.2

g

C

O

2

78.11

m

a

s

s

o

f

C

O

2

=

67.6

g

C

O

2

Therefore, the mass in grams of

C

O

2

formed from 20 grams of

C

6

H

6

is

67.6

g

C

O

2

.

it is a problem of app

The grams of C₆H₆ needed to produce 25 g of CO₂ are 7.38g.

Avogadro's number is the number of units in one mole of any substance and equals to 6.02214076 × 10²³. The units can be electrons, atoms, ions, or molecules.

No. of moles is defined as a particular no. of particles that we can calculate with the help of Avogadro’s number.

Mass of a particular product is also find out by stoichiometry of a reaction as per the no. of mole given in the reaction.

Given,

Mass of CO₂ = 25g

2C₆H₆ + 15O₂ → 12CO₂ + 6H₂O

As per reaction, 156g of C₆H₆ gives - 528g of CO₂

0.295g of C₆H₆ gives - 1g of CO₂

0.295 × 25 g of C₆H₆ gives - 25g of CO₂ = 7.38g C₆H₆

Therefore, The grams of C₆H₆ needed to produce 25 g of CO₂ are 7.38g.

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