Please see the pic, I'd solved in it..
Answer:
The jewelry is 2896.54_Kg/m^3 less dense than pure silver
Explanation:
Density of jewellery = (mass of jewellery) ÷ (volume of jewellery)
=3.25g ÷ 0.428mL = 0.00325Kg÷0.000000428m^3 = 7583.46Kg/m^3
The density of silver is 10490_Kg/m^3 which is (10490 - 7583.46) 2896.54_Kg/m^3 more dense than the jewellery
The density of Silver [Ag]
The weight of Silver per cubic centimeter is 10.49 grams or the weight of silver per cubic meter is 10490 kilograms, that is the density of silver is 10490 kg/m³; at 20°C (68°F or 293.15K) at a pressure of one atmospheres.
The money lost through the recrystallization process billion
As per the data given in the question,
Mass of aspirin formed =1.366 g
Mass of recrystallized aspirin =0.209 g
Loss of mass of aspirin during recrystallization =1.366-0.209 g=1.157 g
Per cent loss
Cost of 1 mg aspirin =0.0861 cents
cost of 1.157 g or 1157 mg aspirin cent =1 (approximately)
41000 metric tons of aspirin
Loss during production of of aspirin =1
Loss during production of of aspirin
Hence, loss billion
For such more questions on recrystallization process.
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Answer:
-6.517 kJ is the heat of combustion for this sample that is 0.2301 grams of ethanol.
Explanation:
Mass of bomb calorimeter = 2.000 kg = 2.000 × 1000 g = 2000. g
1 kg = 1000 g
Specific heat of bomb calorimeter = c = 2.45 J/g°C
Change in temperature =
Heat absorbed by the bomb claorimeter = Q
Heat energy released on combustion of 0.2301 grams of ethanol = Q'= -Q
Q' = -Q = -6,517 J = -6.517 kJ
1 J = 0.001 kJ
-6.517 kJ is the heat of combustion for this sample that is 0.2301 grams of ethanol.
Hello!
For this reaction: 2H
₂ + O₂ → 2H₂O
If 19 g of oxygen reacts completely,
you'll need 2,39 g of H₂
To calculate that, you need to use the following conversion factor, applying molar equivalences, reaction coefficients, and molar masses, to go from grams of Oxygen to grams of Hydrogen: