Answer:
J. J. Thomson discovered electrons.
Explanation:
Thomson discovered electrons using the cathode ray tube experiment. When he observed the results of the experiment, he made his own atomic model. He created the Plum Pudding Model, which states that electrons are spread out among the atom with the protons (modern day, this is incorrect).
The H+ concentration in a solution =10^(-1.25)=0.05623413M
Answer:
Q = 217.63J
Explanation:
Data;
Mass = 34.5g
T1 = 26.4°C
T2 = 75.3°C
c = 0.129J/g°C
Energy (Q) = mc(T2 - T1)
Q = 34.5 * 0.129 *(75.3 - 26.4)
Q = 4.4505 * 48.9
Q = 217.629J
Q = 217.63J
The heat gained was 217.63J
