How many atoms are in 3.5 L of Neon at STP? Show your work!

Answer:

2 Sb3+ (aq) + 3 S2- (aq) ⇒ Sb2S3 (s)

 Explanation:

Molecular equation for Sb(OH)3 + Na2S

2 Sb(OH)3 (aq) + 3 Na2S (aq) ⇒ Sb2S3 (s) + 6 NaOH (aq)

Ionic equation for Sb(OH)3 + Na2S

2 Sb3+ + 6 OH-  + 6 Na+ + 3 S2- ⇒ Sb2S3 + 6 Na+ + 6 OH-

To get the net ionic, any duplications on the left or right side would be canceled.

∴ Thus, the net ionic equation for Sb(OH)3 + Na2S is 2 Sb3+ (aq) + 3 S2- (aq) ⇒ Sb2S3 (s)

The net ionic equation is a chemical equation that shows only those ions that are involved directly in the formation of the final product. The net ionic equation for the given reaction is [tex]\bold { 2 Sb3^+ (aq) + 3 S_2^- (aq) \rightarrow Sb_2S_3 (s)}[/tex].

It is a chemical equation that shows only those ions that are involved directly in the formation of the final product.

So, molecular equation,

[tex]\bold {2 Sb(OH)_3 (aq) + 3 Na_2S (aq) \rightarrow Sb_2S_3 (s) + 6 NaOH (aq)}[/tex]

Now, write the ionic equation,

[tex]\bold {2 Sb_3^+ + 6 OH^- + 6 Na+ + 3 S_2^- \rightarrow Sb_2S_3 + 6 Na^+ + 6 OH^-}[/tex]

To make a Net ionic equation cancel all the duplicate ions present on both sides of the equation.

[tex]\bold { 2 Sb3^+ (aq) + 3 S_2^- (aq) \rightarrow Sb_2S_3 (s)}[/tex]

Therefore, the net ionic equation for the given reaction is [tex]\bold { 2 Sb3^+ (aq) + 3 S_2^- (aq) \rightarrow Sb_2S_3 (s)}[/tex].

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Answer:

Option D. Electron clouds with a total of 7 electrons.

Explanation:

For an atom to be neutral (i.e having a charge of zero), the number of protons and electrons must be equal.

Thus, to know which option is correct, we shall determine the number of protons and electrons in the nitrogen atom as given in the question above.

From the question given above, we obtained the following:

Atomic number = 7

Mass number = 14

Number of protons =?

Number of electrons =.?

Next, we shall determine the number of protons in the nitrogen atom as follow:

Atomic number of an element is simply defined as the number of protons in the atom of the element. Mathematically,

Atomic number = proton number

Atomic number = 7

Therefore,

Number of protons = 7

Next, we shall determine the number of electrons in nitrogen atom as follow:

Since the atom is neutral (i.e having a charge of zero), the number of protons and electrons are equal i.e

Number of protons = number of electrons

Number of protons = 7

Therefore,

Number of electrons = 7

Thus, the nitrogen atom must have 7 electrons in order for it to be neutral.

**** Check ****

Charge of atom = Proton – Electron

Charge = 0

Proton = 7

Electron = 7

Charge of atom = Proton – Electron

0 = 7 – 7

0 = 0

Answer:

A and D

Explanation:

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One mole of or 392 g of chromium sulphate gives 3 moles of sulphate ions. Thus 30 g of chromium gives 0.15 moles of sulphate ions or 9.39 ×10²² ions.

Ions are charged substances formed by electron lose or gain by an atom. If an atom gain an electron it acquire one unit of  negative charge and if it lose an electron it acquires a positive charge.

The ionization of chromium sulphate is written as follows:

[tex]Cr_{2}(SO_{4})_{3} \rightarrow 2Cr^{3+} + 3SO_{4}^{2-}[/tex]

Hence, one moles of chromium sulphate forms 3 moles of sulphate ions. One mole of chromium sulphate is 392.18 g/mol. Thus number of moles 20.4 g of the compounds is 20.4 / 392.18 = 0.052 moles.

The number of moles of sulphate ions produced by 0.052 moles of chromium sulphate is calculated as follows:

0.052 × 3 = 0.15 moles.

One mole of sulphate ion contains 6.022 × 10 ²³ions. Thus number of ions in 0.15 moles is 0.15 ×6.022 × 10 ²³ =  9.39 ×10²² ions.

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Answer:

Explanation:

It is odd to describe the presence of a given substance and its dissolved species as a competition but the state is called an equilibrium in solubility.

Answer:

Solubility

Explanation:

Mark that

The amount of given substance and dissolved species is constant at equilibrium .

As per le ch atler's principle

If you change the concentration it would affect the Equilibrium n

Answer:

A red shirt appears red to our eyes because the shirt absorbs the red wavelengths of visible light. The shorter the wavelength of light, the more energy it has.

Explanation:

Please mark as brainliest

The volume of CO₂ at 683 torr and 25.0°C released into the atmosphere daily by this company is 2.53×10⁸ L

Mole = mass / molar mass

Mole of CaCO₃ = 9.3×10⁸ / 100

Mole of CaCO₃ = 9.3×10⁶ moles

Balanced equation

CaCO₃ —> CaO + CO₂

From the balanced equation above,

1 mole of CaCO₃ reacted to produce 1 mole of CO₂

Therefore,

9.3×10⁶ moles of CaCO₃ will also react to produce 9.3×10⁶ moles of CO₂

V = nRT / P

V = (9.3×10⁶ × 0.0821 × 298) / 0.899

V = 2.53×10⁸ L

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Answer:

Are held together by strong electrostatic forces of attraction between oppositely charged ions. These compounds have high melting points and high boiling points because of the large amounts of energy needed to break the many strong bonds.

Explanation:

:)

Answer:

c

Explanation:

resources are distributed unevenly and often must be moved for human use

Answer:c

Explanation: correct on edg 2020

Answer:

they are call the engine of the cell because they are the one that provides energy for the cells

The molarity of the solution in a large beaker that has 6.75 L of a solution containing 5.25 moles of copper (II) sulfate in water is 0.78M.

The molarity of a solution can be calculated using the following formula:

M = n/V

Molarity = 5.25/6.75

Molarity = 0.78M

Therefore, the molarity of the solution in a large beaker that has 6.75 L of a solution containing 5.25 moles of copper (II) sulfate in water is 0.78M.

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Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question

mass = 60 g

volume = 2 cm³

We have

[tex]density = \frac{60}{2} \\ [/tex]

We have the final answer as

Hope this helps you

Because the extent of ionic charge is more important than ionic radius in calculating the lattice energy of ionic compounds. Because the ionic charge of the N3-ion is greater than that of the F-ion, the Na3N molecule has a higher lattice energy than the NaF complex.

The lattice energy increases when the ion charge variable is increased. As a result, ions with higher charge values generate ionic compounds with higher lattice energies. As a result, ions with lower charges lower the lattice energies of their compounds.

Answer:

3HClO⁴ + Pb(NO³)³ => Pb(ClO⁴)³ + 3HNO²

Answer:

4HCIO4+-3Pb(NO3)3-and3Pb(CIO4)3+4HNO2

Answer: Heat energy is another name for thermal energy.

Explanation:

As thermal energy comes from moving particles, it is a form of kinetic energy. Thermal energy comes from a substance whose molecules and atoms are vibrating faster due to a rise in temperature.

Answer:

When a substance heats up, the rise in temperature makes these particles move faster and bump into each other. Thermal energy is the energy that comes from the heated up substance. The hotter the substance, the more its particles move, and the higher its thermal energy.

Answer:

7.2 × 10^7 is the correct answers.

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Answer:

This question requires use of Avogrado’s constant that states there are 6.02 x10^23 constituent particles contained in the amount of a substance given by one mole. Constituent particles are usually molecules, ions or atoms. Therefore there are 18.06x10^23 total atoms, 12.04x10^23 oxygen atoms, 6.02x10^23 carbon atoms and 6.02x10^23 carbon dioxide molecules.

Answer:

Air is considered as a mixture because it is composed of various separate components. The air has no characteristic properties of its own. ur welcome :)

Explanation:

Answer:

once hydrogen ions are outside the membrane they are allowed to flow back in. this flow is changed to energy that is stored in the bonds of new molecules.

Explanation:

Answer:

d.-379 cal/mol

Explanation:

ΔG = ΔG⁰ + RT ln K

for equilibrium ΔG = 0

ΔG⁰ + RT ln K =0

ΔG⁰   =  -  RT ln K

PG ⇒ PEP

K = [ PEP ] / [ PG ]

= .68 / .32

= 2.125

ΔG⁰   =   - 1.987 x 273 x  ln 2.125

= - 409 Cal / mole

Option d is the nearest answer .

Answer:

carbon dioxide and water

Explanation:

Example: Combustion of Methane (CH₄(g))

CH₄(g) + 2O₂(g) => CO₂(g) + 2H₂O(g)**

____________________

Note: The combustion of any hydrocarbon produces CO₂ & H₂O. That is,

Ethane (C₂H₆) + O₂ => CO₂(g) + H₂O(g)

Propane (C₃H₈) + O₂ => CO₂(g) + H₂O(g)

Butane (C₄H₁₀) + O₂ => CO₂(g) + H₂O(g)

The issue remaining is to balance the reaction equation. For these type equation balance Carbon 1st, then Hydrogen and finish with Oxygen. Balancing in this order leaves Oxygen which can be balanced using fractions. If problem requires lowest whole number ratios of elements, simply multiply entire equation by 2 to get standard equation*

______________________

*Standard Equation is defined as the smallest whole number ratios of elements. The 'standard equation' is significant in that it is assumed to be at STP conditions; i.e., 0⁰C (=273K) & 1.0 Atmosphere pressure.

    => 2C₂H₆ + 7O₂(g) => 4CO₂(g) + 6H₂O(g)  <= Standard Form of Rxn

    => 2C₃H₈ + 13O₂(g) => 4CO₂(g) + 5H₂O(g) <= Standard Form of Rxn

______________________

**Also, note that water, H₂O(g), is listed as a gas. In some cases it will be listed as a liquid, H₂O(l).

A substance burning in the presence of oxygen produces heat and light, a process known as combustion. Combustible compounds are defined as those substances that burn. Carbon dioxide and water are the products. The correct option is B.

The process of combustion is a chemical interaction between the fuel (hydrocarbon) and the oxygen. Heat and light energy are released when fuel and oxygen react. The flame then develops from the energy of heat and light. Hydrocarbon + Oxygen = Heat energy is the equation for a combustion reaction.

Complete combustion occurs when there is a sufficient amount of air available. The hydrocarbon fuel's carbon and hydrogen atoms undergo an exothermic reaction with oxygen to form carbon dioxide and water. Energy is released.

Thus the correct option is B.

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Answer:

100

Explanation:

follow the basic order of events using the formula

V is velocity so 20m/s

M is mass so 0.5kg

20^2 is 400

so then 1/2 * 0.5 is .25

then .25 * 400 is 100 (KE)
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Answer:

The FIRST option, give me brainliest answer pls

Explanation:

The photosynthesis equation is as follows: 6CO2 + 6H20 + (energy) → C6H12O6 + 6O2 Carbon dioxide + water + energy from light produces glucose and oxygen

Answer:

(a)

carbon dioxide+ glucose+ sunlight * water + oxygen

Explanation:

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