Answer:
12.01 g
Explanation:
Molar mass is the number of grams of a substance per mole of it.
Molar masses of elements are actually already present in the periodic table. Looking at carbon (C) on a periodic table, you'll find that its molar mass is approximately 12.01 grams.
I am 100% positive it is C. Have a ice day ( ^ω^ )
Explanation:
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Answer:
Mass = 13.14 g
Explanation:
Given data:
Mass of zinc = 11.89 g
Mass of HCl needed = ?
Solution:
Chemical equation:
Zn + 2HCl → ZnCl₂ + H₂
Number of moles of Zn:
Number of moles = mass/molar mass
Number of moles = 11.89 g/ 65.38 g/mol
Number of moles = 0.18 mol
Now we will compare the moles of Zn and HCl.
Zn : HCl
1 : 2
0.18 : 2/1×0.18 = 0.36 mol
Mass of HCl:
Mass = number of moles × molar mass
Mass = 0.36 mol ×36.5 g/mol
Mass = 13.14 g
Should be D, because alpha particles are absorbed by soil and gamma isn't
