As a result of temperature regulation within the body of endothermic animals, human bodies are much exposed to the environment than any other endothermic animal which causes human to sweat through their sweat glands and dogs has no sweat glands like that of human
I am pretty shore the answer is d and plaz mark as brainliest
0.157 moles of Hg will be produced from 34.0 g of HgO.
<u>Explanation:</u>
2HgO → 2Hg + O2
Molar mass of HgO = 216.59 g / mol
34.0 g / (216.59 g / mol) = 0.156979 mol HgO
1: HgO: Hg = 1 coefficient ratio ( mol defense ) because ,
0.156979 mol HgO = 0.156979 mol Hg
= 0.157 mol of Hg.
.
The correct answer is 2.73.
HF is a weak acid which partially dissociates to release H+ and F-
HF → H⁺ + F⁻
Initial 0.0050 0 0
Change -x +x +x
Equilibrium 0.0050–x +x +x
Solve by using the equilibrium expression: = [H⁺] [F⁻]/ [HF]
6 .8 x 10⁻⁴= x. x / 0.0050 –x
6 .8 x 10⁻⁴= x² /0.0050
x² = 6 .8 x 10⁻⁴ x 0.0050
x² = 3.4 x 10⁻⁶
x = 3.4 x 10⁻⁶
[H⁺] = 1.84 x 10⁻³
pH = - log [H⁺] = - log (1.84 x 10⁻³)
pH = 2.73
Answer:
a) 15.2 kJ/g
b) 1367 kJ/mol
Explanation:
<u>Given:</u>
Mass of lactic acid = 0.5865 g
Heat capacity C of calorimeter = 4.812 kJ/C
Initial temperature, T1 = 23.10 C
Final temperature, T2 = 24.95 C
<u>To determine:</u>
Heat of combustion/gram and heat/mole lactic acid
<u>Calculation:</u>
Molar mass of lactic acid = 90.08 g/mol
The heat of combustion is given as:
where C = heat capacity of calorimeter
T1 and T2 are the initial and final temperatures
a) heat of combustion per gram
b) heat of combustion per mole