A picture of the electroplating apparatus can be found attached. The nail (cathode) is completely submerged and that is where reduction happens. In the other side, the copper strip is (anode) where oxidation happens. The electron flow happens from the anode to the cathode. The positive charge of the battery is attached to the anode while the negative side is attached to the cathode.
Answer:
Explanation:
We are asked to convert particles to moles.
<h3>1. Avogadro's Number </h3>
1 mole of any substance contains the same number of particles (atoms, molecules, formula units). This is Avogadro's Number or 6.022*10²³.
In this problem, the particles are atoms of copper. So, 1 mole of copper contains 6.022*10²³ atoms of copper
<h3>2. Convert Atoms to Moles</h3>
Use Avogadro's Number to make a ratio.
We are trying to convert 8.3*10²⁰ atoms of copper to moles, so we multiply that value by the ratio.
The units of "atoms Cu" will cancel.
Condense the expression into 1 fraction.
<h3>3. Round</h3>
The original measurement of atoms has 2 significant figures, so our answer must have the same. For the number we calculated that is the ten-thousandths place.
The 7 in the hundredth thousandth place tells us to round the 3 up to a 4.
8.3*10²⁰ atoms of copper are equal to <u>0.0014 moles of copper. </u>
Answer:
A potassium atom (atomic number 19) and a bromine atom (atomic number 35) can form a chemical bond through a transfer of one electron. The potassium ion that forms has 18 electrons. What best describes the bromide ion that forms? It is a negative ion that has one more valence electron than a neutral bromine atom.
Explanation:
Explanation:
1 mol = 22.4 l
5.42 mol = 22.4 × 5.42 = 121.408
in two decimal place it is 121.41
Answer: None of these rabbits listed. they are all different species
Explanation:
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