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Nikolay [14]
2 years ago
6

Type a sentence or two about early models of telephones. Include its description.

Chemistry
2 answers:
Evgesh-ka [11]2 years ago
8 0

Answer:early models of telephones were used with a twirl of numbers

Explanation:

Not advanced technology

Charra [1.4K]2 years ago
5 0

Answer:

flip phone

Explanation:

they fliped and it was small and u ddint have many games back then it was the phone after the twirling phone

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Balance the reaction for the combustion of pentane: ?C5H12+?O2→?CO2+?H2O Enter the four coefficients in order, separated by comm
Daniel [21]

Answer:

The four coefficients in order, separated by commas are 1, 8, 5, 6

Explanation:

We count the atoms in order to balance this combustion reaction. In combustion reactions, the products are always water and carbon dioxide.

C₅H₁₂  +  ?O₂→  ?CO₂ + ?H₂O

We have 12 hydrogen in right side and we can balance with 6 in the left side. But the number of oxygen is odd. We add 2 in the  right side, so we have 24 H, and in the product side we add a 12.

As we add 2 in the C₅H₁₂, we have 10 C, so we must add 10 to the CO₂ in the product side.

Let's count the oxygens: 20 from the CO₂ + 12 from the water = 32.

We add 16 in the reactant side. Balanced equation is:

2C₅H₁₂  + 16O₂→  10CO₂ + 12H₂O

We also can divide by /2 in order to have the lowest stoichiometry

C₅H₁₂  + 8O₂→  5CO₂ + 6H₂O

6 0
3 years ago
Which functional group is found in an ester?
Klio2033 [76]
<h2>QUESTION:- Which functional group is found in an ester?</h2>

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so common formula of ester ->

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IN WHICH R AND R' ARE CARBON CHAINS

4 0
2 years ago
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Hello!

Your answer is A.. Earth's core is the most dense layer and it consists of the outer core and the inner core.

Hope this helps :))
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Answer:

Explanation:

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3 years ago
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liberstina [14]

Answer:

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