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tamaranim1 [39]
3 years ago
14

Which is an example of an endothermic reaction? A. combustion of fuels B. burning of wood C. cellular respiration D. photosynthe

sis E. nuclear explosion
Chemistry
2 answers:
kifflom [539]3 years ago
8 0

D. photosynthesis is an endothermic reaction

grandymaker [24]3 years ago
6 0

Answer: D. photosynthesis

Explanation:

Exothermic processes are those processes in which heat is released and endothermic processes are those processes in which heat is absorbed.

A. Combustion of fuels is an oxidation of hydrocarbons where energy is released.

B. Burning of wood is oxidation of carbon in which energy is released.

C. Cellular respiration is oxidation of food to release energy as ATP.

D. Photosynthesis is process of generation of food by green plants by use of sunlight as energy source.

E. Nuclear explosion involves nuclear reactions in which energy is released.

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In terms of their electron configurations, why is cesium more likely to lose its valence electron than potassium?
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Explanation:

use the term electron sheilding, the more electrons between the valence el3ctron and nucleus the easier to lose the valence electron (more sheilding = easier to lose)

5 0
3 years ago
Two grams of potassium chloride are completely dissolved in a sample of water in a beaker. This solution is classified as
Eddi Din [679]
The answer is (3) a homogeneous mixture. The difference between homogeneous and heterogeneous mixture is the degree of the mixture being mixed. Due to the completely dissolved and the dissolving ability of KCl, we can get the answer,
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Gasoline and motor oil are chemically similar. They are both mixtures of nonpolar hydrocarbons
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Answer:

motor oil

Explanation:

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5 0
3 years ago
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Consider a hypothetical reaction in which A and B are reactants, and C and D are products. If 26 grams of A completely reacts wi
natali 33 [55]

Answer:

The answer to your question is: 24 grams of D

Explanation:

To answer this question we need to remember the Lavoisier law of conservation of mass, which says that in a chemical reaction matter is neither created nor destroyed.

This means that the amount of matter stays the same.

Then, the reaction is

                    A      +      B      ⇒       C      +      D

                 26 g         12 g             14 g            x

mass                              

of reactants      38 g                              ?          mass of products, but it must be

                                                                          equal to the mass of products

Then                14g + x = 38

                        x = 38 - 14

                        x = 24 g of D                                                        

4 0
3 years ago
What did sewage treatment in Ancient Rome and 19th century London have in common? How effective was this strategy and why?
anygoal [31]

Yea pretty much

Explanation:

4 0
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