Answer:
The correct answer is 7.1 degree C.
Explanation:
Based on the given information, the initial temperature or To of the block is 23.4 degree C.
The energy lost or Q from the given wooden block is -759 J.
The specific heat capacity or c of the wood given is 1.716 J/g°C
The mass of the wooden block given is 27.2 grams.
There is a need to find the final temperature of the wooden block, for this the formula to be used is,
Q = m × c × (T-To)
Now by putting the given values in the formula we get,
-759 = 27.2 × 1.716 (T - 23.4)
T = 7.1 degree C.
False. A mixture represents elements or molecules which are not chemically combined.
Answer:
The amount of anhydrous crystal are coming out of the solution when this is cooled from 80°C to 30°C are 5 kg of A
Explanation:
A saturated solution is a chemical solution containing the maximum concentration of a solute dissolved in the solvent, and knowing the solubility of component A at 80°C it is possible to know their amount, thus:
10Kg of water × = 8 kg of A
The maximum concentration that water can dissolve at 30°C is:
10Kg of water × = 3 kg of A
Thus, the amount of anhydrous crystal are coming out of the solution when this is cooled from 80°C to 30°C are:
8 kg of A - 3 kg of A = 5 kg of A
I hope it helps!
Answer:
Explanation:
Hello there!
In this case, according to the given chemical reaction:
It turns out possible for us to realize about the 7:8 mole ratio of O2 to CO, and therefore, the theoretical yield of the latter is calculated via stoichiometry:
Finally, the percent yield is calculated by dividing the actual yield, 36.5 g by the just computed theoretical one:
Regards!
The nitrogen atom in NH3 is sp3 hybridized. ... In NH3 molecule, three of the sp3 orbitals are used to formbonds to the three hydrogen atoms and the fourth sp3 orbital is used to hold the lone pair. and is sometimes called a non-bonding pair.