Answer:
D. All of the Above
Explanation:
i just took the test on edgenuity
H₂O₂ → <span> O</span>₂ +<span> H</span>₂<span>O
</span>
Since the hydrogen peroxide (H₂O₂ ) is being broken down into two constituents (O₂ and H₂O) then this therefore means that this type of reaction would be a DECOMPOSITION reaction.
Answer:
Mass of Cu react =31.14 g
Explanation:
Given data:
Mass of Cu react = ?
Mass of silver produced = 105.2 g
Solution:
Chemical equation:
Cu + 2AgNO₃ → 2Ag + Cu(NO₃)₂
Number of moles of Ag:
Number of moles = mass/ molar mass
Number of moles = 105.2 g/107.87 g/mol
Number of moles = 0.98 mol
Now we will compare the moles of Cu and silver from balance chemical equation:
Ag : Cu
2 : 1
0.98 : 1/2×0.98 = 0.49 mol
Mass of Cu:
Mass = number of moles × molar mass
Mass = 0.49 mol ×63.546 g/mol
Mass = 31.14 g