Answer:
1. Land 2. open 3. broken 4. Lava matter 5. Force of the plates
Answer:
These elements show variable oxidation state because their valence electrons in two different sets of orbitals, that is (n-1)d and ns. The energy difference between these orbitals is very less, so both the energy levels can be used for bond formation.
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Answer:
1.69 × 10² ball bearings
Explanation:
The output of a plant is 4335 pounds of ball bearings per week (five days). The output of the plant per day is:
4335 lb/5 day = 867.0 lb/day
1 pound is equal to 453.592 grams. The mass in grams made each day is:
867.0 lb/day × (453.592 g/1 lb) = 1.911 g/day
Each ball bearing weighs 0.0113 g. The number of ball bearings made each day is:
1.911 g/day × (1 ball bearing/0.0113 g) = 1.69 × 10² ball bearing
The balanced equation for the reaction is as follows
Cu₂O + 2HCl ---> 2CuCl + H₂O
Molar ratio of Cu₂O to CuCl is 1:2
mass of Cu₂O reacted - 73.5 g
Number of moles of Cu₂O reacted - 73.5 g / 143 g/mol = 0.51 mol
According to the molar ratio,
when 1 mol of Cu₂O reacts then 2 mol of CuCl is formed
therefore when 0.51 mol of Cu₂O reacts then - 2 x 0.51 mol of CuCl is formed
number of CuCl moles formed - 1.02 mol
mass of CuCl formed - 1.02 mol x 99 g/mol = 101 g
mass of CuCl formed is 101 g