C I’m pretty sure. The first step is the rate determining step
Answer:
Explanation:
Substance are consist of very large number of atoms, ions , molecules etc.
They can not be count in a simple way. Scientist used Avogadro number to express the large number of atoms, ions, molecules.
Avogadro number:
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
For example,
18 g of water = 1 mole = 6.022 × 10²³ molecules of water
1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen
96.06 g of SO₄²⁻ ion = 1 mole of SO₄²⁻ ion = 6.022 × 10²³ ions of SO₄²⁻
Answer:
1. The plastic is poor conductor of electricity
Explanation:
Indeed when two objects are placed in a room, there'll be flow of energy between the objects and the air in the room until all of them are at the same temperature. So when a person touches a metal that has been sitting in a room and it feels colder than a plastic bag at the same temperature because the moment he touches the metal, which is a good conductor of heat, it immediately starts conducting heat away from his hand leaving his hand with the sensation of "coldness". However when you touch a plastic, a poor conductor, it does not feel as cold because it is conducting very little heat from the hand.
Answer: True
Explanation: The answer is true because A compound is a molecule made of atoms from different elements. All compounds are molecules, but not all molecules are compounds. … There are two main types of chemical bonds that hold atoms together: covalent and ionic/electrovalent bonds. Atoms that share electrons in a chemical bond have covalent bonds.
Answer:
<u>The half-reaction that occurs on the anode of an electrolytic cell is called oxidation.
</u>
This can easily be depicted by a chemical reaction as such <u>"Zn(s) = Zn2+ (aq) + (2e-)"
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While, the Zinc in this reaction loses two elections. Hence copper gains those electrons and becomes solid.
<em>These reactions occurring on the anode are called positive reactions.
</em>
While the reaction that occurs on the cathode is called reduction. This reaction can be represented by this equation "<u>Cu2+ (aq) + 2e- = Cu(s)</u>".
<u>These non-spontaneous reactions occurring in an electrolytic cell together are called redox reactions. These generate electrical energy.</u>
