Answer:
Light energy can be converted to heat energy. Electrical energy can be converted to mechanical energy, light energy, heat energy, etc. Chemical energy can be converted to electrical energy. Thermal energy can be converted to heat energy
Explanation:
If you look at the periodic table, underneath each element it give you the atomic mass, which has the units g/mol. So CO2 have a molecular mass (MM) of those combined atomic masses.
The MM for CO2 would be...
12.01 g/mol + 2(16.00 g/mol) = 44.01 g/mol
This can be used as a conversion to change from moles to grams.
8 mol * (44.01 g / 1 mol) = 352.08 g or 6 x 10 to the 2 g for the significant figures (sig figs) at are shown in your problem.
You may have just typed 8 instead of 8.0 or 8.00 which would change your sig figs. It is all important to right now all your zeros, since almost all chemistry calculations involve significant figures.
I solved the above equation using dimensional analysis and had to cancel out the units, in case this is your first chemistry class.
I hope I helped!
Answer:
Let the mixture is X% by mass of CuSO
4
.5H
2
O and 100 - X % by mass of MgSO
4
.7H
2
O. 5.0 g of mixture will contain 0.05X g CuSO
4
.5H
2
O and 5.0 - 0.05X g MgSO
4
.7H
2
O
The molar masses of CuSO
4
.5H
2
O and MgSO
4
.7H
2
O are 249.7 g/mol and 246.5 g/mol respectively.
The number of moles of CuSO
4
.5H
2
O=
249.7
0.05X
=2.00×10
−4
X moles.
Explanation:
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