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dlinn [17]
3 years ago
10

Name the stellar process in which the fusion of hydrogen produces other elements.

Chemistry
1 answer:
Vilka [71]3 years ago
3 0
<span>Hydrogen fusion generates the energy for proton - proton chains and the carbon nitrogen oxygen cycle. It is the nuclear fusion of 4 protons to form a helium 4 nucleus.</span>
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Whitepunk [10]

Answer:

a. absorbs energy as heat and has positive enthalpy of solution.

Explanation:

A reaction can either be exothermic or endothermic. An endothermic reaction, as the dissolution described in the question, is that which absorbs heat energy from the surroundings in order to start the reaction.

Because an endothermic reaction makes heat lost from the surroundings, the enthalpy (∆H) of the solution will be positive (+). ∆H is got by finding the difference between the enthalpy of the reactants and products and since the enthalpy of a product in endothermic reaction is more, the enthalpy change (∆T) will be positive.

8 0
3 years ago
The density of aluminum is 2.70 g/cm3. What is the mass of a solid piece of aluminum with a volume of 2.50 cm3?
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Answer:

<h2>6.75 g</h2>

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question we have

mass = 2.7 × 2.5

We have the final answer as

<h3>6.75 g</h3>

Hope this helps you

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