Answer:
This is not a chemical change
Explanation:
The dark green solution mixed with the water, but the water is still water. There were no bubbles, smell, temperature change, or any other signs of a chemical change
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Answer:
Explanation:
6.90 mol x grams
2As + 6NaOH = 2Na3AsO3 + 3H2
6 mol 2 mol
192 g/mol
6.90 mol NaOH x 2 mol Na3AsO3/6 mol NaOH== 2.3 mol Na3AsO3
2.3 mol Na3AsO3 x 192 g/mol = 442 g Na3AsO3
16.94 % Zn
Explanation:
First we need the molar weight of the Zn₃(PO₄)₂:
molar weight of Zn₃(PO₄)₂ = atomic weight of Zn × 3 + atomic weight of P × 2 + atomic weight of O × 4 × 2
molar weight of Zn₃(PO₄)₂ = 65.4 × 3 + 31 × 2 + 16 × 4 × 2 = 386 g/moles
Taking in account weight of 1 mole of Zn₃(PO₄)₂ we devise the following reasoning:
if 386 g of Zn₃(PO₄)₂ contains 65.4 g of Zn
then 100 g of Zn₃(PO₄)₂ contains X g of Zn
X = (100 × 65.4) / 386 = 16.94 % Zn
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percent composition
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Answer:
The object will continue moving north.
Explanation:
Equal and opposite forces east and west
People with a good credit score usually have high salaries and their job is safe, usually in a respectable place or a company. They are known to always pay their debt on time and thus ensure that their credit score is high meaning that there is a chance that they will be given better interests or similar things when they apply for a loan again.