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Olegator [25]
3 years ago
7

Which of the following equations does not represent a redox reaction?

Chemistry
1 answer:
bija089 [108]3 years ago
4 0

Answer:

a. NH3+ HCl → NH4Cl

c. 2O3 → 3O2

Explanation:

A redox reaction is a reaction in which there is loss or gain of electrons. As  a result of that , there is a change in the oxidation number of the species involved in the reaction.

If we look at the species shown in the answer, there isn't any change in oxidation number as we move from left to right hence they are not redox reactions.

Redox reactions lead to change in oxidation number of species from left to right.

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Which best describes the geologic time scale? (choose the best answer from below)
Evgen [1.6K]

Answer: B) It presents the correct sequence of events in Earth’s history.

Explanation: edge 2021

5 0
3 years ago
How can you tell from a substance's formula if it is ionic or molecular?
frozen [14]
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3 0
3 years ago
Calculate the mass of Octane needed to release 6.20 mol Co2
n200080 [17]
The combustion reaction of octane is as follow,

                           C₈H₁₈  +  25/2 O₂     →     8 CO₂  +  9 H₂O

According to balance equation,

8 moles of CO₂ are released when  =  114.23 g (1 mole) Octane is reacted

So,

      6.20 moles of CO₂ will release when  =  X g of Octane is reacted

Solving for X,
                                     X  =  (114.23 g × 6.20 mol) ÷ 8 mol

                                     X  =  88.52 g of Octane
Result:
           88.52 g of Octane is needed to release 6.20 mol CO₂.
8 0
3 years ago
how many moles of sodium are present in a sample of sodium having a mass of 137 g? (molar mass is 23.0g)
vivado [14]

Answer:

5.95 moles

Explanation:

No of moles = given mass / molar mass

No of moles = 137/23

= 5.95 moles

7 0
3 years ago
Why do depositions often look layerd?
aalyn [17]

Sedimentary rocks have layers because of different depositions of sediments over time.

8 0
2 years ago
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