Moles = mass (g) / molar mass (g/mol)
Molar mass of copper = 63.5 g/mol
Molar mass of magnesium = 24.3 g/mol
Moles of copper = 6.23 g / 63.5 g/mol = 0.098 mol
Moles of magnesium = 6.23 g / 24.3 g/mol = 0.256 mol
according to the Avogadro constant,
1 mol = 6.022 x 10²³
Hence,
atoms of copper = 0.098 x 6.022 x 10²³ = 5.902 x 10²²
atoms of magnesium = 0.256 x 6.022 x 10²³ = 15.416 10²²
Hence magnesium ribbon has more atoms.
Molecular mass of MgCl2 = 24.31+2(35.45)=95.21
Number of moles in 307 g
=307/95.2
=3.224 mol
=3.22 mol (rounded to 3 significant figures)
Answer:
The two main variables in an experiment are the independent and dependent variable. An independent variable is the variable that is changed or controlled in a scientific experiment to test the effects on the dependent variable. A dependent variable is the variable being tested and measured in a scientific experiment.
Explanation:
Hope this helps...
Answer:
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Answer:
I am almost positive that it is D. I might be incorrect do i appoligise if i am.
Explanation: