The question is incomplete; the complete question is;
In the early 1900s many scientists thought that an atom consisted of a positive substance with negative charges scattered throughout the substance. Then Ernest Rutherford completed an experiment that changed the concept of an atom. His discovery led to the understanding that an atom consists mostly of empty with space with-
Protons orbiting a dense nucleus made of electrons and neutrons
Electrons orbiting a dense nucleus made of protons and neutrons
Neutrons and protons orbiting a cloud of electrons
Electrons and protons orbiting a cloud of neutrons
Answer:
Electrons orbiting a dense nucleus made of protons and neutrons
Explanation:
Rutherford established the nuclear theory of the atom by his famous experiment. In his experiment, alpha particles were used to bombard a thin gold foil and the movement of the particles was observed on a moveable zinc sulphide screen.
It was discovered from the experiment that the atom was mostly made up of empty space. The electrons orbit a dense nucleus comprising of protons and neutrons.
A substance that influences the reaction but does not participate in the reaction is called a catalyst. In other words, it <span>increases the rate of a chemical reaction without itself undergoing any permanent chemical change.
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Answer:
9.0 mol
Explanation:
- C₂H₄(g) + 3O₂(g) → 2CO₂ (g) + 2H₂O (g)
In order to <u>convert from moles of CO₂ to moles of O₂</u>, we need to use the <em>stoichiometric coefficients</em> in the balanced reaction. We use a conversion factor that has moles of CO₂ in the denominator and moles of O₂ in the numerator:
- 6.0 mol CO₂ *
= 9.0 mol O₂
Answer:
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Explanation:
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