Answer:a) ∆E=-0.077KJ (exothermic)
b) ∆E = 110KJ (endothermic)
Explanation:
a) ∆E = q + w
q= 0.763 KJ
w= -840J = -0.840 KJ
∆E = 0.763-0.840 = - 0.077KJ
Exothermic reaction are those reactions that proceeds with the release of heat to the surroundings and Energy is negative in exothermic processes.
b)/∆E = q+w
q= 66.1KJ, w=44KJ
∆E = 101KJ
And it is endothermic
When work is done on a system, the international energy increases.
Explanation:
mole of acid/mole of base=(concentration of acid×volume of acid)/(concentration of base×volume of base)
Na/Nb=CaVa/CbVb
1/2=(Ca×16.7)/(0.2×25)
0.2×25=2×Ca×16.7
Ca=(0.2×25)/(2×16.7)
Ca=0.15mol/dm³
mole of acid=Concentration×volume
mole of acid=0.15×(16.7/1000)
mole of acid=2.5×10^-3moles
Answer:
_____ play an important role in creating responsible and informed health care consumers and in the development and design of health services.
The answer is Option D (Health psychologists)
Explanation:
Health psychologists:
Is a sub-field of psychology which focus on the bio-psycho-social factors, thereby applying psychological principles and research to the enhancement of health and the treatment and prevention of illness.
Health psychology can further be explained as the application of psychological knowledge and methods to the study, prevention, and management of physical diseases, disorders and behavioral processes in health, illness, and healthcare.
Roles of Health psychologists
Below are some of the important roles health psychologists play:
- Health psychologists identify and treat psychological distress in patients with physical diseases. Thereby offering therapy for difficulties relating to anxiety, depression, addictions, and risky behaviors
- Analyze the best ways to promote healthy living and disease prevention, and they focus on appropriate programs of treatment, including therapy, in collaboration with other involved health professionals.
- Intervene with psychological assistance when people are diagnosed with serious illness. For example, providing psychological support for Intensive Care Unit patients.
Finding percent composition is fairly easy. You only need to divide the mass of an element by the total mass of the compound. We can do this one element at a time.
First, let's find the total mass by using the masses of the elements given on the periodic table.
7 x 12.011 (mass of Carbon) = 84.077
5 x 1.008 (mass of Hydrogen) = 5.04
3 x 14.007 (mass of Nitrogen) = 42.021
6 x 15.999 (mass of Oxygen) = 95.994
Add all of those pieces together.
84.077 + 5.04 + 42.021 + 95.994 = 227.132 g/mol is your total. Since we also just found the mass of each individual element, the next step will be very easy.
Carbon: 84.077 / 227.132 = 0.37016 ≈ 37.01 %
Hydrogen: 5.04 / 227.132 = 0.022189 ≈ 2.22 %
Nitrogen: 42.021 / 227.132 = 0.185 ≈ 18.5 %
Oxygen: 95.994 / 227.132 = 0.42263 ≈ 42.26 %
You can check your work by making sure they add up to 100%. The ones I just found add up to 99.99, which is close enough. A small difference (no more than 0.03 in my experience) is just a matter of where you rounded your numbers.
The answer is C 5m. Thanks