Answer:
47.2%
Explanation:
Judging from the question given, the theoretical yield is 10g because the student had already made his/her calculation and was expecting to get the same result at the end of the experiment. But he could only get 4.72g from the experiment.
Now, The percentage yield can be obtain as follows
Experimental yield = 4.72g.
Theoretical yield = 10g
%yield = Experimental yield /Theoretical yield x100
% yield = 4.72/10 x100
%yield = 47.2%
Therefore, the percentage yield of the experiment is 47.2%
Answer:
30284.88J
Explanation:
Given parameters:
Mass of ethanol = 257g
Specific heat capacity of ethanol = 2.4J/g°C
Temperature change = 49.1°C
Unknown:
Amount of heat = ?
Solution:
The quantity of heat need to cause a temperature change on a body is given as;
H = m c Δt
where m is the mass
c is the specific heat capacity
Δt is the change in temperature
All units in proper dimensions. Input the parameters and solve for H;
H = 257 x 2.4 x 49.1
H = 30284.88J
The answer is Iron(II) Hydrogen Carbonate. It can also be known or referred as Ferrous Hydrogen Carbonate or even Iron(II) Bicarbonate. The known formula for this chemical is Fe(HCO3)2. The Molar Mass of this chemical is known as 177.8787. Here are some chemical reactions that may be equivalent to this chemical: FeCO3 + H2CO3 = Fe(HCO3)2; or Fe(HCO3)2 = FeCO3↓ + CO2 + H2O; or Fe(HCO3)2 + 2HNO3 = Fe(NO3)2 + 2H2O + 2CO2
Calculate the mass defect and nuclear binding energy of an atom ... To convert to joules per nucleon, simply divide by the number of nucleons.
In terms of workplace we need our safety measures to have a safe and to ensure the awareness of health and safety of every personnel, waste disposal and the security. Speaking of security every laboratories have their own security, well organized and the most important to store information safely and the other data. The information can be stored in LIMS (laboratory information management system) by registration all the samples. You can any kind of device to upload the information.