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vichka [17]
3 years ago
5

When copper metal is heated to 1100 oC it melts. Is this a chemical or physical change? Explain your answer

Chemistry
2 answers:
Pani-rosa [81]3 years ago
6 0

Answer:

it is a physical change

kupik [55]3 years ago
3 0
It is Physical change
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B.melting of a substance
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What does the skeletal system work with?
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I. Three different representations of glucose are<br> given below. Identify each type<br> of model.
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2 years ago
From the choices provided below, list the reagent(s) in order that will react with 3-pentanone to form 3-pentanol
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5 0
4 years ago
During a lab, you heat 1.62 g of a CoCl2 hydrate over a Bunsen burner. After heating, the final mass of the dehydrated compound
sashaice [31]
Answer is: formula of hydrate is CoCl₂· 6H₂O -c<span>obalt(II) chloride hexahydrate
</span>m(CoCl₂· xH₂O) = 1,62 g.
m(CoCl₂) = 0,88 g.
n(CoCl₂) = m(CoCl₂) ÷ M(CoCl₂)
n(CoCl₂) = 0,88 g ÷ 130 g/mol
n(CoCl₂) = 0,0068 mol.
m(H₂O) = 1,62 g - 0,88 g.
m(H₂O) = 0,74 g.
n(H₂O) = m(H₂O) ÷ m(H₂O) 
n(H₂O) = 0,74 g ÷ 18 g/mol
n(H₂O) = 0,041 mol.
n(CoCl₂) : n(H₂O) = 0,0068 mol : 0,041 mol.
n(CoCl₂) : n(H₂O) = 1 : 6.
8 0
3 years ago
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