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ElenaW [278]
3 years ago
13

Explain the energy transformation occurring in the image and how the law of conservation of energy is demonstrated here.

Chemistry
1 answer:
telo118 [61]3 years ago
5 0
The continuous movement of the bike or along those lines
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If 2.32 moles of iron react with excess oxygen gas, how many moles of Fe2O3 can be produced?
bearhunter [10]

Moles Fe₂O₃ produced : 1.16 moles

<h3>Further explanation</h3>

Given

2.32 moles of iron

Required

moles of Fe2O3

Solution

The reaction coefficient in a chemical equation shows the mole ratio of the reacting compounds (reactants and products)

Reaction

4 Fe + 3 O₂ ⇒  2 Fe₂O₃

From the equation, mol ratio Fe : mol Fe₂O₃ = 4 : 2, so mol Fe₂O₃ :

= 2/4 x mol Fe

= 2/4 x 2.32

= 1.16 moles

7 0
3 years ago
What is the difference between the mass number of an isotope and its atomic number?
Ksivusya [100]
The atomic number is the number of Protons on the nucleus of the atom, whereas the mass number of some isotope is the mass of the protons plus the mass of the neutrons. That's the difference between isotopes: number of neutrons.
Ask me if you need any help ;)
5 0
4 years ago
potassium and chlorine react to form potassium chloride. a.it is a redox reaction,explain why. b.see if u can write a balanced e
Elan Coil [88]

Answer:

<em>K</em><em>+</em><em>Cl</em><em /><em>KCl</em>

Explanation:

because the reaction is between metal Potassium and Non-metal Chlorine

8 0
3 years ago
Read 2 more answers
How much (in mL) 12.1 M solution of hydrochloric acid would be required to make 500 mL of a 2.5 M solution
victus00 [196]

Answer:

Volume of the concentrated solution, which is needed is 103.30 mL

Explanation:

Let's apply the formula for dilutions to solve the problem

Conc. Molarity . Conc. volume = Dil. Molarity . Dil volume

12.1 M . Conc. volume = 2.5 M . 500 mL

Conc. volume = (2.5 M . 500 mL) / 12.1M

Conc. volume = 103.30 mL

6 0
4 years ago
The age of fossils can sometimes be determined by radiometric dating, which is based on the constant rate of decay of radioactiv
True [87]
The age of the fossil given the present amount of Carbon-14 is given in the equation,
                               A(t) = A(o)(0.5)^t/h
where A(t) is the current amount, A(o) is the initial amount, t is time and h is the half-life. Substituting the known values to the equation,
                       A(t) / A(o) = 0.125 = (0.5)^(t/5730)
The value of t from the equation is 17190.
Thus, the age of the fossil is mostly likely to be 17190 years old. 
8 0
3 years ago
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