What molecules can produce more energy per gram than sugars and are used for storing energy in animals?

2 answers:

8 0

The answer is C: Lipids. Because:

1 gram of carbohydrates provides <span>17 kJ of energy per gram.
</span>
1 gram of protein provides 17 kJ of energy per gram.

1 gram of fat provides 37 kJ of energy per gram.

Hydrocarbon is a fuel so it is not stored in animals.

Andrei [34K]4 years ago

3 0

The answer is lipids

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In an experiment, hydrochloric acid reacted with different volumes of sodium thiosulfate in water. A yellow precipitate was form

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Answer:

The time decreases steadily

Explanation:

We know that the rate of chemical reaction is defined as how fast or slow a chemical reaction proceeds. Hence a chemical reaction is said to proceed at a faster rate if it takes a lesser time for the reaction to get to completion.

There are certain factors that affects the rate of reaction, prominent among them is the concentration of reactants. Concentration simply means the amount of substance in a system.

Taking a look at the table given in the question, we will realize that the volume of HCl remained constant, the volume of thiosulphate increased steadily while the volume of water decreased steadily. Remember that concentration increases when less water is added to the system. This implies that the reactant concentration increases steadily. Hence, according to the collision theory, particles collide more frequently and the rate of reaction increases.

As the rate of reaction increases, it now takes a lesser time for the reaction to get to completion (indicated by the disappearance of the cross). Hence as we move down the table, it takes lesser and lesser time for the cross to disappear. This means that the column for time will decrease steadily.

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3 years ago

The melting points of alkaline earth metals are many times higher than those of the alkali metals. Explain this difference on th

7nadin3 [17]

The correct answer is higher melting point, bound by metal metal bonds.

While alkali metals only have one valence electron, alkaline earth metals have two. Metal to metal connections hold the metals together. Alkaline earth metals have a stronger metallic connection and a higher melting point because they have two valence electrons.

the characteristics that Group 2 metals excel in over Group 1 metals.

Initial Ionization Potential
Group 2 items are more difficult than group 1 elements.
Strong propensity to produce bivalent compounds

As a result, group 2 metals have stronger metallic bonding, which leads to increased cohesive energy and compact atom packing. This explains why group 2 metals are harder and have higher melting and boiling temperatures than group 1 metals.

To learn more about Group 2A(2) refer the link:

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2 years ago

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Endothermic processe: Melting ice cubes, evaporation of water

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