match the following ​

Answer:

i think b is the answer hope this helps:))

Answer:

The electronic configuration for Phosphorus(P) is 1s2,2s2 2p6, 3s2 3p3

Answer:

3

Explanation:

co2 has 2 and h2o has 1

product is right side

atomic mass for N = 7

electron configuration: 1s²2s²2p³

orbital diagram:

↑↓   ↑↓    ↑ ↑ ↑

1s²  2s²      2p³

Answer:

See below

Explanation:

From periodic chart

Mg = 24.305 gm per mole

24.305 * 3 = 72.915 gm

Na = 22.989

Cl = 35.45            summed = 58.439 gm per mole

   58.439 * 4.2 = 245.4438 gm

Answer:

Below

Explanation:

The ocean is becoming more acid, which means the pH is decreasing. In that time frame it has decreased by about 0.05

Answer:

3 ATM   = INITIAL PRESSURE

Explanation:

P1V1 = P2V2

P1 * 25   =  5 * 15

P1 = 3 ATM

Using the stoichiometry of the balanced chemical reaction, the mass of the Ti is 144Kg.

The term chemical reaction refers to the combination of two or more substances to yiled one or more products.

The reaction equation here is; 4Na(s) + TICI4---->Ti(s) + 4NaCl(s)

Number of moles of TiCl4 = 570  * 10^3g/190 g/mol = 3000 moles

If 1 mole TiCl4 produces 1 mole of Ti

3000 moles of TiCl4 produces 300o moles of Ti

Mass of Ti produced = 3000 moles * 48 g/mol = 144Kg

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Answer:

Both are caused by heating. Both are Chemical changes.

Explanation:

Water evaporates from the Sun's heat and is transformed into a gas. Sediment is the particles of an object. When heat hits it, it starts breaking up, or in dry cases, heating and cracking.

After heating the crucible, cooling, and weighing the sample as 0.739 g, the students should have heated the crucible again and then reweigh the sample until a constant weight is obtained.

The sample being heated, CaCl2 2 H2O, contains water of hydration.

In order to arrive at an anhydrous sample of the salt, all the water molecules must be completely evaporated off by heating.

To do so, the sample should have been heated to constant weight by repeated heating and weighing until there is no longer a change in the weight of the sample.

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The estimated wavelengths and identities of the elements of spectral line in the given atomic spectrum is:

Atomic spectrum is the spectrum of frequencies or wavelengths of radiations absorbed or emitted when electrons transitions between on energyblevel to another.

The estimated wavelengths as well as identities of the elements of spectral lines shown above are as follows

Therefore, the wavelengths and colors of the spectral line in an atomic spectrum is useful in identifying elements.

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Answer:

The molecules are held together by intermolecular force of attraction. More the force the fusion takes after some time only that means the melting point is high. So molecules with greater molecular forces have high melting point and less molecular forces have low melting point.

Answer:

On heating a solid, the kinetic energy of the particle increases. The particle start vibrating with greater speed. The energy supplies by heat overcomes the force of attraction between the particles.

If this force of attraction is more, then more heat energy will be necessary to overcome this force. So, the melting point of the solid will be higher.

The number of moles will be 0.178 moles. It can be calculated by ideal gas law.

The ideal gas law  gave the relationship between pressure, volume as well as temperature. It can be expressed as:

PV =nRT

Where, P is pressure, V is volume and T is temperature.

Calculation of number of moles by using ideal gas law.

Put the value of given data in above ideal gas law formula.

n = PV / RT

n = (1 atom × 4 L)/ (0.0821  × 273 K

n = 0.178 moles.

Therefore, the number of moles will be 0.178 moles.

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Answer:

Matter is made-up of minute particles. Minute particles of matter have space between them.

So, when common salt is added to water, the particles of salt get into the space between particles of water.

Hence, common salt (Table salt) dissolves in water.

Answer:

37.5 moles of O2 needed

Explanation:

2 moles of  C6H6   need   15 moles of O2

5/2  * 15 = 37.5   of O2 needed

negative ion or anion

hope it helps...!!!

Answer:

C. None of these

Explanation:

Answer:

0.0562

Explanation:

Ph=-log[H+]

to find the h+ is the antilogarithm of the Ph.

Which is 10 raised to the power - Ph.

Answer:

5.62

-2

Explanation:

What is the H+ concentration in a solution with a pH of 1.25? Round to the nearest hundredth.

5.62 × 10n M n= -2

Answer:

Denaturation

Explanation:

Answer:

please you left that of I2 gas

Answer: Red supergiant.

Explanation:

The stars in group C are even more luminous than the giants. These are super giants, the largest of stars with extremely high luminosisties. A red supergiant such as Betelguese would extend beyond the orbit.

Answer:

211.2g/mol

Explanation:

[tex]mass \: of \: carbon = 12 \\ mass \: of \: lead = 12(17.6) \\ = 211.2gmol {}^{ - 1} [/tex]

Answer:

+1

Explanation:

Answer:

B

Explanation:

I think that the anserw is B.

Answer:

6.022×1023 individual items of that something. You have 3 moles, so there are 3×6.022×1023 oxygen molecules

Explanation:

6.022×1023 individual items of that something. You have 3 moles, so there are 3×6.022×1023 oxygen molecules

Answer:

39.379 liters

Explanation:

One mole of gas at STP = 22.4 l / mole

22.4 l/mole * 1.758 mole = 39.379 liters

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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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:

0.1 moles

Explanation:

3.4 g * (1 mol/34 g) = 0.1 moles