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Vikentia [17]
2 years ago
6

Name two elements that are extracted from their compounds by electrolysis.

Chemistry
2 answers:
Paladinen [302]2 years ago
8 0

Answer:

Hydrogen and oxygen

Explanation:

This is the most common compound water

  • When water goes through electrolysis it produces two elements
  • H_2 and O_2

The reaction is given by

  • H_2O-->H_2+O_2
Zanzabum2 years ago
8 0

Answer:

Hydrogen and helium is the answer

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The Earth revolves in a path called_________around the sun.
Rasek [7]
It’s called revolution
3 0
3 years ago
Read 2 more answers
How many moles of carbon are in 6.0 moles of quinine
damaskus [11]
The molecular formula of quinine is C20H<span>24N2</span>O<span>2. For every 1 mole of quinine molecule, there are 20 moles of carbon. Simply multiplying 6.0 moles by 20, we get, 120 moles.
Therefore, there are 120 moles of carbon in 6.0 moles of quinine.</span>
4 0
3 years ago
`Let's just consider the concept of stoichiometry without any confusing chemicals. Here is a generic equation: 2A + 6B ? 3C. If
lesya [120]

Answer:

Option D. 5.5

Explanation:

The equation is this:

2A + 6B  ⇒  3C

With the amounts that we were given, let's determine which is the <em>limting reactant</em>

2 A reacts with 6 B

4 A will react with ( 4 .6)/2 = 12B

I have 11 B, so the limiting is B

6 B react with 2 A

11 B will react with (11 .2 )/6 =3.66 A

I have 4 A, so A is the excess.

6 B produce 3 C

11 B will produce ( 11 .3)/6 = 5.5C

7 0
3 years ago
The standard heats of formation for CO2(g), C2H6(g), and H2O(l) are -394.0 kJ/mol, -84.00 kJ/mol, and -286.0 kJ, respectively. W
Ivanshal [37]

Answer:

ΔH°r = -1562 kJ

Explanation:

Let's consider the following combustion.

C₂H₆(g) + 7/2 O₂(g) ⇒ 2 CO₂(g) + 3 H₂O(l)

We can calculate the standard heat of reaction (ΔH°r) using the following expression:

ΔH°r = ∑np × ΔH°f(p) - ∑nr × ΔH°f(r)

where,

ni are the moles of reactants and products

ΔH°f(i) are the standard heats of formation of reactants and products

The standard heat of formation of simple substances in their most stable state is zero. That means that ΔH°f(O₂(g)) = 0

ΔH°r = ∑np × ΔH°f(p) - ∑nr × ΔH°f(r)

ΔH°r = [2 mol × ΔH°f(CO₂) + 3 mol × ΔH°f(H₂O)] - [1 mol × ΔH°f(C₂H₆) + 7/2 mol × ΔH°f(O₂)]

ΔH°r = [2 mol × (-394.0 kJ/mol) + 3 mol × (-286.0 kJ/mol)] - [1 mol × (-84.00 kJ/mol) + 7/2 mol × 0]

ΔH°r = -1562 kJ

6 0
3 years ago
A potential energy diagram is shown. What is the total change in enthalpy of this reaction? 25 kJ 30 kJ 35 kJ 55 kJ
Kazeer [188]

Answer : The total change in enthalpy of this reaction is 25 kJ.

Explanation :

Enthalpy of reaction : It is defined as the changes in heat energy takes place when reactants go to products. It is denotes as .

ΔH = Energy of product - Energy of reactant

ΔH is positive when heat is absorbed and the reaction is endothermic.

ΔH is negative when heat is released and the reaction is exothermic.

In the given potential energy diagram, the energy of product at higher level and energy of reactant at lower level. The ΔH for this reaction will be positive.

Given:

Energy of product = 55 kJ

Energy of reactant = 30 kJ

ΔH = Energy of product - Energy of reactant

ΔH = 55 kJ - 30 kJ

ΔH = 25 kJ

Thus, the total change in enthalpy of this reaction is 25 kJ.

5 0
3 years ago
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