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masha68 [24]
3 years ago
8

I thought heavy elements like iron & gold were dense & sank into the interior of the molten planet? How did gold get on

top of the less dense crust?
Chemistry
1 answer:
Pavel [41]3 years ago
6 0

Answer:

If it is denser then water it shall float  but if water has a higher density the object sinks

Explanation:

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Based on the following reaction, how much water is produced when oxygen react with 1 mole of C₂H8?
Alexandra [31]

Answer:

4 moles

Explanation:

For every mole of deuteriomethane consumed, 4 moles of water are produced.

So, the answer is 4 moles.

6 0
2 years ago
What is an example of a community protecting Earth's resources? (2 points)
Lerok [7]

D. A town has started a new recycling and composting program

7 0
3 years ago
The overall force on an object is called the:
shusha [124]

Answer: D

Explanation:

Balanced force is when 2 equal forces are acting on each other, summing force isn’t a thing, unbalanced force is when 2 unequal forces are acting on each other, and net force is the total amount of forces acting on an object. Hope this helps!

8 0
4 years ago
Read 2 more answers
What is the value for ∆Soreaction for the following reaction, given the standard entropy values?
Soloha48 [4]
To get the ∆S of the reaction, we simply have to add the ∆S of the reactants and the ∆S of the products. Then, we get the difference between the ∆S of the products and the ∆S of the products. If the <span>∆S is negative, then the reaction spontaneous. If the otherwise, the reaction is not spontaneous.</span>
8 0
3 years ago
I wanted known how many of the reaction below is energy released
Tema [17]

Answer:

2

Explanation:

In two reactions energy is released.

1) C₆H₁₂O₆ + 6O₂    →    6H₂O + 6CO₂ + heat

It is cellular respiration reaction.It involves the breakdown of glucose molecule in the presence of oxygen to yield large amount of energy. Water and carbon dioxide are also produced as a byproduct.

Glucose + oxygen → carbon dioxide + water + 38ATP

2) 2H₂ + O₂   →    2H₂O  ΔH = -486 kj/mol

The given reaction is formation of water. In this reaction oxygen and hydrogen react to form water and 486 kj/mol is also released.

The reaction in which heat is released is called exothermic reaction.

Exothermic reaction:

The type of reactions in which energy is released are called exothermic reactions.

In this type of reaction energy needed to break the bonds are less than the energy released during the bond formation.

For example:

Chemical equation:

C + O₂   →  CO₂

ΔH = -393 Kj/mol

it can be written as,

C + O₂   →  CO₂ + 393 Kj/mol

Endothermic reactions:

The type of reactions in which energy is absorbed are called endothermic reactions.

In this type of reaction energy needed to break the bond are higher than the energy released during bond formation.

For example:

C + H₂O   →  CO  + H₂

ΔH = +131 kj/mol

it can be written as,

C +  H₂O  + 131 kj/mol  →  CO  + H₂

5 0
3 years ago
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