Which formula is an ionic compound?

CO2

NaF

N2

NO2

Answer:

NH₄⁺ (aq) + OH⁻ (aq) → H₂O (l) + NH₃ (g)

General Formulas and Concepts:

Chemistry - Solutions

Explanation:

Step 1: RxN

NH₄Cl (aq) + NaOH (aq) → H₂O (l) + NH₃ (g) + NaCl (aq)

Step 2: Balance RxN

NH₄Cl (aq) + NaOH (aq) → H₂O (l) + NH₃ (g) + NaCl (aq)

Step 3: Ionic Equations

Total Ionic Equation

Break up aqueous solutions.

NH₄⁺ (aq) + Cl⁻ (aq) + Na⁺ (aq) + OH⁻ (aq) → H₂O (l) + NH₃ (g) + Na⁺ (aq) + Cl⁻ (aq)

Net Ionic Equation

Cancel out spectator ions.

NH₄⁺ (aq) + OH⁻ (aq) → H₂O (l) + NH₃ (g)

Answer:

c insulators

Explanation:

Answer:

C: Insulators

Explanation:

Hope This Helps :)

Answer:

a) anode

b) anode

c) cathode

d) anode

Answer:

C

Explanation:

Answer:

4. Transfer of heat through the movement of particles

Explanation:

because it goes in a circular motion

Answer:

Explanation:

1.

 Given parameters:

Number of moles of CaO = 0.22moles

Unknown:

Mass of CaO = ?

Solution:

Mass, number of moles and molar mass are related using the expression below;

  Mass  = number of moles x molar mass

Molar mass of CaO  = 40 + 16  = 56g/mol

  Insert the parameters and solve;

  Mass = 0.22 x 56  = 12.32g

2

Given parameters:

Number of moles of NaCl  = 0.83moles

Unknown:

mass of NaCl  = ?

Solution:

Also,

 Mass  = number of moles x molar mass

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

Now insert the parameters and solve;

    mass = 0.83 x 58.5

     mass  = 48.6g

3.

Given parameters:

Number of moles of H₂SO₄  = 0.5moles

Unknown:

mass of H₂SO₄ = ?

Solution:

Mass  = number of moles x molar mass

Molar mass of H₂SO₄  = 2(1) + 32 + 4(16) = 98g/mol

Insert the parameters and solve;

  Mass = 0.5 x 98  = 49g

The final volume : 3.4 L

Charles's Law  

When the gas pressure is kept constant, the gas volume is proportional to the temperature  

[tex]\tt \dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex]

V₁=3300 ml

T₁=63 + 273=336 K

T₂=78+273=351 K

the final volume :

[tex]\tt V_2=\dfrac{V_1.T_2}{T_1}\\\\V_2=\dfrac{3300\times 351}{336}\\\\V_2=3447.3~ml\rightarrow 2~sig.~fig.\rightarrow 3.4~L[/tex]

Answer:

Explanation:

The instantaneous speed is the speed of an object at a particular moment in time. And if you include the direction with that speed, you get the instantaneous velocity.

Answer:

Explanation:

Diagram 2! Because the polar H2O molecules can induce temporary dipoles on the electron clouds of 02 molecules.

Answer:

Higher chain length, higher boiling point

Polar species are soluble in similar polarity water, Non polar species are soluble in similar non polar oil.

Explanation:

Chain length refers to the number of carbons. As it increases, boiling points of alkanes increase for these compounds. Reason behind is that longer chain molecules become more entangled along with each other.

Polarity bonds atoms together, by chemical bonding - through sharing seperated electric charge ie electrons. Polar Solvents have large dipole moments, contain bonds between atoms with different electro negativities. Non Polar solvents contain bonds between atoms with similar electro negativities.

Answer:

0.02kg

Explanation:

Given parameters:

Amount of heat  = 5200J

Unknown:

Mass of ice that would be melted at 0°C = ?

Solution:

To solve this problem, use the expression below;

        H  = mL

H is the heat

m is the mass

L is the latent heat of fusion of ice  =  3.33 x 10⁵ J/kg.

 Insert the parameters and solve for m;

           5200  = m x 3.3 x 10⁵

             m  = [tex]\frac{5200}{3.33 x 10^{5} }[/tex]   = 0.02kg

Answer:

neutrons are inside the nucleus

Explanation:

The most significant contribution that added to Rutherford's discovery of a positive nucleus is that neutrons are also inside the nucleus.

2SO₂+O₂⇒2SO₃  ΔH=-197 kJ

Based on the principle of Hess's Law, the change in enthalpy of a reaction will be the same even though it is through several stages or ways

Reaction

2SO₂+O₂⇒2SO₃

Given :

1. S(s)+O₂(g)→SO₂(g) ΔH = -297 kJ

Reverse

SO₂(g) ⇒S(s)+O₂(g ΔH = +297 kJ (sign change to +) x 2

2SO₂(g) ⇒2S(s)+2O₂(g ΔH =  +594 kJ

2.2S(s)+3O2(g)→2SO3(g) ΔH=-791kJ

Add both reactions and remove/subtract the same compound for different sides

1. 2SO₂(g) ⇒2S(s)+2O₂(g) ΔH =  +594 kJ

2.2S(s)+3O₂(g)→2SO₃(g) ΔH=-791kJ

--------------------------------------------------------+

2SO₂+O₂⇒2SO₃  ΔH=-197 kJ

Answer:

Percent error =  4.8%

Explanation:

Given data:

Measured value = 26.1 K

Actual value = 24.9 K

percent error = ?

Solution:

Formula:

Percent error = [ measured value - actual value/ actual value] × 100

Percent error =   [26.1 K - 24.9 K/24.9 K] × 100

Percent error = [ 1.2K /24.9K]× 100

Percent error = 0.048 × 100

Percent error =  4.8%

Answer:

Conduct Electricity and Are malleable

Explanation:

Answer:

conduct electricity

are malleable

Explanation:

Metals conduct electricity because they have “free electrons.” Unlike most other forms of matter, metallic bonding is unique because the electrons are not bound to a particular atom. This allows the delocalized electrons to flow in response to a potential difference.

And since metals don't tightly hold on to electrons during metallic bonding, they are easily replaced. In metallic bonding, electrons are delocalized and move freely among nuclei. When a force is exerted n the metal, the nuclei shift, but the bonds do not break, giving metals their characteristic malleability.

Answer:

Increased, 7.5-8.3

Decreases, 3.5-4.3

Gay Lussacs law

Explanation:

There are so many laws for ideal gas at constant temperature , at constant pressure, the law at constant volume is called Gay-Lussac's law. Therefore, on increasing temperature to approximately 400 K (127°C), the pressure will also increase.

According to this law, pressure is directly proportional to temperature. This gas law is valid only to ideal gas not on the vanderwaal gas. Since it is mentioned in the question that volume is constant we can apply Gay-Lussac's law over here.

Mathematically

P₁T₂=P₂T₁

Since according to this law, pressure is directly proportional to temperature, so on increasing temperature to approximately 400 K (127°C), the pressure will also increase.

Therefore, on increasing temperature to approximately 400 K (127°C), the pressure will also increase.

To know more about Gay-Lussac's law, here:

https://brainly.com/question/11387781

#SPJ2

Answer:

This question is incomplete

Explanation:

This question is incomplete. However, it should be noted that if the containers are compared with an equal average volume, the containers having solids will have larger masses than that containing liquid which will also have a larger mass than that containing gas. This is because solids have there molecules touching each other in compact manner which makes the molecule exert a certain combined force/mass. The molecules of liquid are also close to one another but are not compact like the solids and are hence exerting a lesser force/mass than solids. Gases have free molecules that are far apart and thus are usually the lightest when they occupy the same volume as liquids and solids.

Answer:

2360J

Explanation:

Given parameters:

Mass of aluminum  = 25g

Melting point  = 658°C

Latent heat of melting  = 94.4j/g

Unknown:

Amount of heat require for melting = ?

Solution:

The amount of heat required for this melting will be the product of the mass of the aluminum and the latent heat of melting;

  H = m L

m is the mass

L is the latent heat of melting

  Insert the parameters and solve;

 H = 25 x 94.4 = 2360J

Answer:

0.6139M

Explanation:

A 3.50% by mass of NaCl means there are 3,50g of NaCl in 100g of solution. To find molarity we need to convert the mass of NaCl to moles and mass of solution to liters as follows:

Moles NaCl -molar mass: 58.44g/mol-:

3.50g NaCl * (1mol / 58.44g) = 0.05989 moles of NaCl

Liters solution:

100g solution * (1mL / 1.025g) * (1L / 1000mL) = 0.09756L of solution

Molarity -Ratio of moles and liters-:

0.05989 moles of NaCl / 0.09756L of solution =

Answer:

There are 18 moles of oxygen in 3.0 mole of glucose...

Explanation:

Does it help???

Answer:

18.066× 10²³ molecules

Explanation:

Given data:

Number of moles of oxygen = 3.0 mol

Number of molecules = ?

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.  The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ molecules

3 mol  × 6.022 × 10²³ molecules  / 1 mol

18.066× 10²³ molecules

Answer:

See attached picture.

Explanation:

Hello!

In this case, considering that the cyclohexane has six carbon atoms and therefore twelve hydrogen atoms in its structure because it has no double bonds unlike benzene which actually has three and therefore it has six carbon atoms but six hydrogen atoms, on the attached picture, you will see the structure of both hydrocarbons as required, considering that each carbon atom must have four bonds in order to complete the corresponding octets.

Best regards!

Answer:

Number of moles of CO₂ produced = 11.1 mol

Explanation:

Given data:

Mass of ethane = 5.55 mol

Number of moles of CO₂ produced = ?

Solution:

Chemical equation:

2C₂H₆ + 7O₂       →     4CO₂ + 6H₂O

Now we will compare the moles of ethane and carbondioxide.

             C₂H₆          :           CO₂

                 2             :            4

              5.55          :         4/2×5.55 = 11.1 moles

Number of moles of CO₂ produced =  11.1 mol

Answer:

C. either A or B

Explanation:

To calculate the energy of a photon returning to its ground state, we required either the frequency or the wavelength. Often times, not both.

The wavelength of a photon can be derived by;

     E = hf

 or

        E  = [tex]\frac{hc}{wavelength}[/tex]  

 h is the Planck's constant

 c is the speed of light

 f is the frequency

Answer:

A. air pressure,this is answer.

Answer:

Ebenezer Scrooge's business is to take care of his own establishment and thus, refused to donate/ contribute any to the charity.

He feels this way because he thinks that it is not one's business to interfere in another's business.

Explanation:

Charles Dickens's play "A Christmas Carol," tells the story of the protagonist Ebenezer Scrooge and his 'hatred' of the Christmas festival. But it was during this time of the year that he got 'inspired' by the ghost of his late partner c um friend Marley, teaching him a life lesson that changed Scrooge for the better.

When the two gentlemen came to visit the workplace of Scrooge expecting some donation for charity, Scrooge refused to give a single penny. According to him, the suffering of the people and their need is none of his business. He exclaims "I don’t make merry myself at Christmas and I can’t afford to make idle people merry. I help to support the establishments I have mentioned—they cost enough; and those who are badly off must go there." Rather, his business is to take care of his company, which "occupies [him] constantly" and thus, it's not his business to "not to interfere with other people’s".

he felt this way because he thinks that it is "unfair" and unbecoming to get involved in someone's business.

Answer:

The nucleon number of given atom = 51

Explanation:

An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.

All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom has 6 protons than it must have 6 electrons. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.

The mass number is also called nucleon number.

The nucleon number of given atom = number of protons + number of neutrons

The nucleon number of given atom = 25 + 26

The nucleon number of given atom = 51

Answer:

50/36 = 25/18

Explanation:

Solution at attachment box

Molality = mole of dissolvable (this question glucose) / kg of water

Answer:

Molality = 1.38 mol/Kg

Explanation:

Given data:

Molality of solution = ?

Mass of C₆H₁₂O₆ = 150.0 g

Mass of water = 600.0 g (600 g ×1 kg/1000 g= 0.6 Kg)

Solution:

Number of moles of C₆H₁₂O₆:

Number of moles = mass/molar mass

Number of moles = 150.0 g/180.16 g/mol

Number of moles = 0.83 mol

Molality:

Molality = moles of solute / kg of solvent

Molality =  0.83 mol /0.6 Kg

Molality = 1.38 mol/Kg

it must have been light, so it can be more mobile, and strong to penetrate skin and flesh, and easy to carve so they can put it on a spear.

your welcome and a brainliest would be nice if you can

Answer:

[tex]P_A=4.20atm\\\\P_B=17.1atm[/tex]

Explanation:

Hello!

In this case, since the equation for the ideal gas is:

[tex]PV=nRT[/tex]

For each gas, given the total volume, temperature (28.1+273.15=301.25K) and moles, we can easily compute the partial pressure as shown below:

[tex]P_A=\frac{n_ART}{V} =\frac{1.21mol*0.082\frac{atm*L}{mol*K}*301.25K}{7.12L} \\\\P_A=4.20atm\\\\P_B=\frac{n_BRT}{V} =\frac{4.94mol*0.082\frac{atm*L}{mol*K}*301.25K}{7.12L} \\\\P_B=17.1atm[/tex]

Best regards!