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3 years ago

Balance the following reaction. Choose "blank" if no coefficient is needed.

Chemistry

1 answer:

katen-ka-za [31]3 years ago

4 0

Answer:

4 C2H5 + 13 O2 -> 8 CO2 + 10 H2O

Explanation:

What I do is I make a chart of how many elements the product side and reactant sides have:

Reactants-

2 C

5 H

2 O

Products-

1 C

3 O

2 H

It's easier to see how many coefficients are needed for the reaction to be balanced then. Hope this helped.

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PLEASE HELP ASAP NO LINKS PLEASE

Zarrin [17]

Answer:

gravity

Explanation:

Gravity is the force that pulls us to the surface of the Earth, keeps the planets in orbit around the Sun and causes the formation of planets, stars and galaxies.

Hope this helped!!!

5 0

3 years ago

Consider the reaction between no and cl2 to form nocl. 2no(g) + cl2(g) ⇌ 2nocl(g) a reaction mixture at a certain temperature in

Debora [2.8K]

Answer:

1.125 x 10⁻³.

Explanation:

For the reaction: 2NO(g) + Cl₂(g) → 2NOCl(g).

Kc = [NOCl]²/[NO]²[Cl₂],

Where, [NOCl], [NO], and [Cl₂] is the equilibrium concentration of NOCl, NO, and Cl₂.

∵ Initial concentration of NO and Cl₂ = 0.50 M.

And the equilibrium concentration of NOCl = 0.30 M.

∴ The equilibrium concentration of NO, and Cl₂: [NO] = [Cl₂] = 0.50 M - 0.30 M = 0.20 M.

∴ Kc = [NOCl]²/[NO]²[Cl₂] = [0.30]²/[0.20]²[0.20] = 1.125 x 10⁻³.

7 0

3 years ago

What best describes ionization energy?

Ksenya-84 [330]

Answer: energy needed to remove an electron from an atom or ion in the gas phase. Explanation: That is the very definition of ionization energy: ionization energy is the energy needed to remove (get appart) an electron from a neutral atom or ion in gas phase.Jun 19, 2016

4 0

4 years ago

The compound calcium cyanamide (CaNCN) is used as a nitrogen source for crops. To obtain this compound, calcium carbide is react

fenix001 [56]

N2 + CaC2 = CaNCN + C
As you can see, 1 mol of N2 can react completely with 1 mol of CaC2 and 1 mol of CaNCN will be obtained 
It means 5 mol of N2 can react completely with 5 mol of CaC2 and 5 mol of CaNCN will be obtained 

So, there are 7.5 - 5 = 2.5 odd mole of CaC2 after the reaction 
And the mass of obtained CaNCN is 
m = n*M = 5*80 = 400g

4 0

4 years ago

There are two steps in the usual industrial preparation of acrylic acid, the immediate precursor of several useful plastics. In

tatyana61 [14]

Answer:

-470.4 kJ/mol

Explanation:

Balanced reactions equations are as follows.

CaC2 (s) + 2H2O (l) â C2H2 (g) + CaOH2 (s) ÎH=â414.kJ

6C2H2 (g) + 3CO2 (g) + 4H2O (g) â 5CH2CHCO2H (g) ÎH=132.kJ

To get the 6 C2H2 we need to multiply first equation by 6

Then we get

6CaC2 (s) + 12H2O (l) â 6C2H2 (g) + 6CaOH2 (s) ÎH=â414.kJ * 6 = -2484 kJ

6C2H2 (g) + 3CO2 (g) + 4H2O (g) â 5CH2CHCO2H (g) ÎH=132.kJ

So the total energy produced = -2484 kJ + 132.0 kJ = -2352 kJ

This amount of energy is given out for the 5 moles of acid

So lets convert it for 1 mol

-2352 kJ * 1 mol / 5 mol = -470.4 kJ/mol

So the delta H of reaction for the formation of the acrylic acid is -470.4 kJ/mol

5 0

3 years ago