First cell theory. All living things are composed of cells.
Second cell theory. Cells are the basic unit of structure and function in living things.
Third cell theory. All cells are produced from other cells
Answer:
What are all the products of a hydrocarbon combustion reaction?
A. Carbon dioxide, water vapor, and heat
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Answer:
safety glasses, safety goggles, face shield, they protect your eyes from harmful liquids, bright lights
Answer:
Mass of Cu(NO₃)₂ produced = 125.67 g
limiting reactant = Cu
Explanation:
Given data:
Mass of Cu = 42.6 g
Mass of HNO₃ = 84.0 g
What is limiting reactant = ?
Mass of Cu(NO₃)₂ produced = ?
Solution:
Chemical equation:
3Cu + 8HNO₃ → 3Cu(NO₃)₂ + 4H₂O + 2NO
Number of moles of Cu:
Number of moles = mass/ molar mass
Number of moles = 42.6 g/63.546 g/mol
Number of moles = 0.67 mol
Number of moles of HNO₃:
Number of moles = mass/ molar mass
Number of moles = 84 g/63.01 g/mol
Number of moles = 1.3 mol
Now we will compare the moles of Cu(NO₃)₂ with HNO₃ and Cu from balance chemical equation.
HNO₃ : Cu(NO₃)₂
8 : 3
1.3 : 3/8×1.3 = 6
Cu : Cu(NO₃)₂
3 : 3
0.67 : 0.67
Number of moles of Cu(NO₃)₂ produced by Cu are less so Cu will limiting reactant.
Mass of Cu(NO₃)₂:
Mass = number of moles × molar mass
Mass = 0.67 mol × 187.56 g/mol
Mass = 125.67 g
