Grease is nonpolar. It is made up of lengthy hydrocarbon chains attached to glycerol (triacylglycerols). Because of this property, nonpolar solvents, such as tetrachloroethylene, can get grease out of clothes. This solvent acts by dissolving the grease, thereby removing it from clothes without leaving any residue.
<u>Answer:</u> The amount of heat released is 462.3 kJ
<u>Explanation:</u>
The chemical equation for the reaction of manganese and oxygen to produce manganese (II,III) oxide follows:
We need to calculate the amount heat released for 1 mole of manganese.
To calculate the amount of heat released, we use unitary method:
When 3 moles of manganese is burnt, the amount of heat released is 1387 kJ
So, when 1 mole of manganese is burnt, the amount of heat released will be =
Hence, the amount of heat released is 462.3 kJ
Answer:
the answer is C (dobereiner)
Explanation:
I'm sure
<span>Weight of CaC2 is 1.53 g
Temparature is 23 celcius T = 23 + 273K = 296K
The pressure of the gas P = 755 torr
Calculating the moles of CaC2 n = 1.53g x 64.0994 mol/g = 0.023869 moles
PV = nRT
V = nRT / P => V = (0.023869 mol) x (62.3636 L Torr / K mol) x (296 K) / 755 torr
Volume of C2H2 = 0.587 L</span>
For example:
A 12 oz Coca Cola contains 39g of sugar or C6H12O6.
To calculate for the molarity of sugar in the soda, convert 39 grams of sugar to moles sugar:
39g/ 180.16 g/mol = 0.216 mol sugar
then, convert 12 oz to L:
12oz / (1oz/0.02957L) = 0.35484 L
therefore the concentration of sugar in the soda is:
M = mol sugar / L sol'n
= 0.216 mol sugar / 0.35484 L
= 0.609 M