Answer:
16.92 g C13H18O2
Explanation:
If the molecular mass of C13H18O2 is 206.3 amu, then molar mass of C13H18O2 is 206. 3 g/mol.
So, if we have 0.082 mol C13H18O2, than it is
206.3 g/mol*0.082 mol = 16.92 g C13H18O2.
There are three valence electrons in an atom of Aluminum (Al).
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Al · or : Al : ·
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The answer is B.
Answer:
efficiency of heating with this oven is 51 %
Explanation:
to raise the temp of 200 ml of coffee from 30°C to 60°C the energy input to microwave oven is:
1100 J/s x 45 = 49,500 J
AT 100% efficiency
For 1°C the energy required to raise the temperature of 1 ml = 4.2 J
So for 30 C°, 1°C the energy required to raise the temperature of 200 ml =
Q = (4.2) (200)(30) = 25,200 J
efficiency = 25,200/49,500 = 0.51 = 51%
C. A magnet causing a metal object to move
