diagram shows a structure of compound. To which classes of compound does this molecule belong?

Answer:

I think Cs

Explanation:

because it has 6 energy levels

Answer:

c

Explanation:

Answer:

true

Explanation:

A combustion reaction is a reaction in which a substance reacts with oxygen gas, releasing energy in the form of light and heat. Combustion reactions must involve O2 as one reactant. The combustion of hydrogen gas produces water vapor. ... The products of the combustion of hydrocarbons are carbon dioxide and water.

Answer:

1 Calcium, 2 Nitrogen, and 4 oxygen

Explanation:

there is no number before of after Ca(calcium), so there is only 1. No(nitrogen) has no number next to it so there would be only 1 of it,but there is a 2 after the parenthesis so there is 2 nitrogen (2*1=2). O(oxygen) has a two next to it so there would be only 2 oxygen, but there is a two after the parenthesis so instead there are 4 oxygen because 2*2=4. Hope this helped you <3

Answer:

[tex] \frac{V _{1}}{T _{1}} = \frac{V _{2}}{T _{2} } \\ \frac{446.9}{(14 + 273)} = \frac{238.7}{T _{2} } \\ {T _{2}} = \frac{238.7 \times 287}{446.9} \\ {T _{2}} = 153.3 \: kelvin \\ = 119.7 \degree \: c[/tex]

Answer:

Carboxylic acid is an organic acid containing a carboxyl group. The simplest examples are methanoic (or formic) acid and ethanoic (or acetic) acid. It is  used in the production of polymers, biopolymers, coatings, adhesives, and pharmaceutical drugs. They also can be used as solvents, food additives, antimicrobials, and flavorings.

Explanation:

Hope that helps.

Answer: There are [tex]61.24 \times 10^{23}[/tex] molecules present in 183.2 grams of [tex]H_{2}O[/tex] gas.

Explanation:

Given: Mass = 183.2 g

Number of moles is the mass of substance divided by its molar mass.

As molar mass of water is 18 g/mol. Therefore, moles of [tex]H_{2}O[/tex] are calculated as follows.

[tex]Moles = \frac{mass}{molar mass}\\= \frac{183.2 g}{18 g/mol}\\= 10.17 mol[/tex]

According to the mole concept, there are [tex]6.022 \times 10^{22}[/tex] molecules present in one mole of a substance.

Hence, molecules present in 10.17 moles are calculated as follows.

[tex]10.17 mol \times 6.022 \times 10^{23}\\= 61.24 \times 10^{23}[/tex]

Thus, we can conclude that there are [tex]61.24 \times 10^{23}[/tex] molecules present in 183.2 grams of [tex]H_{2}O[/tex] gas.

Answer:

S = 21.92 %

F = 78.08 %

Explanation:

To find the percent composition of each element in SF6, we must find the molar mass of SF6 first.

Molar mass of SF6 = 32 + 19(6)

= 32 + 114

= 146g/mol

mass of Sulphur (S) in SF6 = 32g

mass of Fluorine (F) in SF6 = 114g

Percent composition = mass of element/molar mass of compound × 100

- % composition of S = 32/146 × 100 = 21.92%.

- % composition of F = 114/146 × 100 = 78.08%.

Answer:

1 - Salts required  that can be compared directly, using Ksp values, to estimate solubilities for copper (II) sulfide are - [tex]CaSO_3[/tex] (Option b) ,[tex]BaCrO_4[/tex] (Option c) and [tex]CaS[/tex] (Option d)

2 - Salts  that can be compared directly, using Ksp values, to estimate solubilities for zinc hydroxide are - [tex]Mg(OH)_2[/tex] (Option a)

Explanation:

[tex]K_s_p[/tex] values can be used to compare the solubility of salts that produce ions in a 1:1 ratio.

Because the salts [tex]CaSO_3[/tex] , [tex]BaCrO_4[/tex] and [tex]CaS[/tex]  have a 1:1 ion ratio, the solubilities of options b, c, and d can be compared to salt 1.

[tex]K_s_p[/tex] Values can be used to compare the solubility of salts that produce ions in a 1:2 or 2:1 ratio.

  2. [tex]Zn(OH)_2[/tex] dissociates into ions in ratio 1:2 .

Because the ions in the salt [tex]Mg(OH)_2[/tex] are in a 1:2 ratio, the solubility of salt 2 can be compared to that of salt 'a'.

Hence , Salt 1 is matched with options b , c , d.

              Salt 2 is matched with option a.

Answer:

4.0

Explanation:

we have a buffer system formed by a weak acid (benzoic acid C₆H₅O₂H) and its conjugate base (benzoate ion C₆H₅O₂⁻, coming from sodium benzoate C₆H₅O₂Na). Given the acid dissociation constant (Ka) for benzoic acid is 6.5 × 10⁻⁵, we can calculate the pH of the buffer solution using the Henderson-Hasselbach equation.

pH =pKa + log [base]/[acid]

pH =-log Ka + log [C₆H₅O₂⁻]/[C₆H₅O₂H]

pH =-log 6.5 × 10⁻⁵ + log (0.15 M/0.25 M) = 4.0

Answer:

[tex]\%N=28.6\%\\\\\%O=71.4\%[/tex]

Explanation:

Hello there!

In this case, according to the given information, it is possible to calculate the percent compositions, by dividing the mass of each element by the sum of the masses of the elements as shown below:

[tex]\%N=\frac{m_N}{m_N+m_O} *100\%\\\\\%O=\frac{m_O}{m_N+m_O}*100\%[/tex]

Thus, we plug in the given masses to obtain:

[tex]\%N=\frac{10.0g}{10.0g+25.00g} *100\%=28.6\%\\\\\%O=\frac{25.00g}{10.0g+25.00g}*100\% =71.4\%[/tex]

Regards!

Solution :

a). [tex]$SO_3$[/tex]

  This compound is known as sulfur trioxide.

  The molecular shape of sulfur trioxide is trigonal planer.

   And the bond angle is 120°.

b). [tex]$N_2O$[/tex]

   This compound is known as Nitrous oxide. Here, nitrogen is in the center.     There is no lone pair around the nitrogen atom and it forms two sigma bonds with the other two atoms.

 It is linear in shape.

  The bond angle between them is 180°.

c). [tex]$CH_2Cl_{2}$[/tex]

  This compound is known as the Dichloromethane.

   The molecular shape of the compound is tetrahedral.

   The bond angles is 120°

Answer:

i moles of copper has 6.022 multiplied by 10raseto 23

Explanation:

Answer:

The maggots had traces of this man in them and the entomologists found out who he was just by using the DNA in the maggots.

Explanation:

Answer:

She shares how there were maggots found in an empty house and found cocaine on them. By this, they knew that the maggots had been feeding off human remains.  They were then able to run more tests and find DNA that were on these maggots and they were able to discover who the victim was.

Answer:

177 mmHg

Explanation:

Given that:

The sample of  a gas is with Pressure (1) [tex]P_1[/tex] = 500 mmHg

The initial temperature [tex]T_1[/tex] = 773 K

The final temperature [tex]T_2[/tex] = 273 K

Using ideal gas equation:

[tex]\dfrac{P_1}{T_1} = \dfrac{P_2}{T_2} \\ \\ \dfrac{500}{773} = \dfrac{P_2}{273} \\ \\ (136500) = 773 \times P_2 \\ \\ P_2 = \dfrac{136500}{773} \\ \\ P_2 = 176.58 \ mmHg \\ \\ \simeq 177 mmHg[/tex]

Answer:

pH = 12.08

Explanation:

First we calculate how many moles of each substance were added, using the given volume and concentration:

As HBr is a strong acid, it dissociates completely into H⁺ and Br⁻ species. Conversely, KOH dissociates completely into OH⁻ and K⁺ species.

As there are more OH⁻ moles than H⁺ moles (5.55 vs 3.75), we calculate how many OH⁻ moles remain after the reaction:

With that number of moles and the volume of the mixture, we calculate [OH⁻]:

With [OH⁻], we calculate the pOH:

With the pOH, we calculate the pH:

Answer:

CuSO₄(aq) + 2KOH (aq) —> Cu(OH)₂(s) + K₂SO₄(aq)

Explanation:

CuSO₄ + 2KOH —> Cu(OH)₂ + K₂SO₄

To know the state of each compounds, we shall determine the complete ionic equation. This can be obtained as follow:

In solution, CuSO₄ and KOH will dissociate as follow:

CuSO₄(aq) —> Cu²⁺(aq) + SO₄²¯(aq)

KOH (aq) —> K⁺ (aq) + OH¯(aq)

CuSO₄(aq) + KOH (aq) —>

Cu²⁺(aq) + SO₄²¯(aq) + 2K⁺(aq) + 2OH¯(aq) —> Cu(OH)₂(s) + 2K⁺(aq) + SO₄²¯(aq)

Note: Cu(OH)₂ is insoluble in water.

Therefore, the elemental equation is:

CuSO₄(aq) + 2KOH (aq) —> Cu(OH)₂(s) + K₂SO₄(aq)

Answer:

253.85 L

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

C₃H₈ + 5O₂ —> 3CO₂ + 4H₂O

From the balanced equation above, 4 moles of water vapor were produced.

Finally, we shall determine the volume of the water vapor produced as follow:

Mole water vapor (n) = 4 moles

Pressure (P) = 1 atm

Temperature (T) = 500 °C = 500 °C + 273 = 773 K

Gas constant (R) = 0.821 atm.L/Kmol

Volume (V) =?

PV = nRT

1 × V = 4 ×0.0821 × 773

V = 253.85 L

Thus, the volume of water vapor obtained is 253.85 L

Answer:

1.95cm x 1.95cm x 1.95cm

Explanation:

20.00g / 2.70g/mL = 7.41 mL = 7.41 cm^3

∛7.41 = 1.95cm

Answer:

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Answer:

Mg

Explanation:

I think Mg is correct not too sure tho

Answer:

Partial lunar eclipse.

Explanation:

A lunar eclipse is a cosmological event by which, in the presence of the Earth between the Sun and the Moon, the latter does not receive the light of the Sun in the totality of its visible face, with which a part (or the totality ) of her is in the dark.

Thus, if the lunar eclipse implies an absence of sunlight in the entire lunar surface, the eclipse will be total, while if the eclipse implies an absence of light only in part, the eclipse will be partial (which is the most common event).

Answer:

Answer is A - The low temperature outside lowers the volume of the gas according to Charles's law because this law describes how a gas will behave at constant pressure.

Explanation:

The low temperature outside lowers the volume of the gas according to Charles's law because this law describes how a gas will behave at constant pressure.

Charles states that, the volume of aa given mass of gas is directly proportional to its temperature at constant pressure.

Hence, to understand this behavior of the gas, we must understand that the low temperature outside lowers the volume of the gas according to Charles's law because this law describes how a gas will behave at constant pressure.

Learn more about Charles's law:https://brainly.com/question/16927784

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Answer:

The solubility of gases decreases with pressure as that of solids and liquids is not affected.

Answer:

3.89

Explanation:

the specific heat is usually quoted at constant pressure but in some applications where pressure changes it is quoted at quoted at constant volume

Answer:

The given statement - The main criterion for sigma bond formation is that the two bonded atoms have valence orbitals with lobes that point directly at each other along the line between the two nuclei , is True.

Explanation:

The above statement is correct , because the sigma bond is produced by the head on overlapping, the orbitals should all point in the same direction.

SIGMA BONDS - Sigma bonds (bonds) are the strongest type of covalent chemical bond in chemistry. They're made up of atomic orbitals that collide head-on. For diatomic molecules, sigma bonding is best characterized using the language and tools of symmetry groups.

Head-on overlapping of atomic orbitals produces sigma bonds. The concept of sigma bonding is expanded to include bonding interactions where a single lobe of one orbital overlaps with a single lobe of another. Propane, for example, is made up of ten sigma bonds, one for each of the two CC bonds and one for each of the eight CH bonds.

Hence , the answer is true .

Answer:

alkali metals

Explanation:

:)

Answer:

7.3125grams

Explanation:

Molarity is the measure of the molar concentration of a solution. It can be calculated using the formula as follows:

Molarity = number of moles (n) ÷ volume (V)

Based on the information given,

Molarity = 1.25 M

Volume = 100 mL = 100/1000 = 0.1 L

Molarity = n/V

1.25 = n/0.1

n = 1.25 × 0.1

n = 0.125mol

Using the below formula to calculate the mass of NaCl;

mole = mass/molar mass

Molar mass of NaCl = 23 + 35.5 = 58.5g/mol

0.125 = mass/58.5

mass = 0.125 × 58.5

mass = 7.3125 grams

Answer:

A. The actual number of atoms in a molecule

Explanation:

Molecular formula is simply defined as a type of chemical formula that describes the type and number of atoms present in a single molecule of a compound.

Looking at the options, the correct answer is option A.

Answer:

a

Explanation: