<h3>The enthalpy of combustion per mole of anthracene : 7064 kj/mol(- sign=exothermic)</h3><h3>Further explanation </h3>
The law of conservation of energy can be applied to heat changes, i.e. the heat received/absorbed is the same as the heat released
Q in = Q out
Heat can be calculated using the formula:
Q = mc∆T
Heat released by anthracene= Heat absorbed by water
Heat absorbed by water =
mol of anthracene (MW=178,23 g/mol)
The enthalpy of combustion per mole of anthracene :
First off, what is nonpoint-source pollution?
It comes from many sources BUT this type of pollution doesn't come from factories discharging their waster, nor sewage pipes, nor smokestack emissions; but rather it comes from rainfall or snow-melt moving through and over the ground. Taking away natural and human-made pollutants.
This being said, the answer, is A. Polluted Rainwater.
Answer:
<h2>Sulfate- SO4^2-</h2><h2>Sulfite- SO3^2-</h2><h2>Permanganate- MnO4</h2><h2>Carbonate- CO3^2</h2>
Explanation:
CARRY ON LEARNING.
The answer is Isotope. Isotopes; each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element. For example, carbon-12, carbon-13 and carbon-14 are three isotopes of the element carbon with mass numbers 12,13 and 14 respectively.
<span>CH3COOH ---> CH3COO- + H+
X X
pH = -log [H+]
3.15 = -log [H+]
[H+] = 7.08*10^-4 M
so,
x = 7.08*10^-4 M
Ka = [CH3COO-] [H+] / [CH3COOH]
1.8*10^-5 = x*x / [CH3COOH]
1.8*10^-5 = (7.08*10^-4)*(7.08*10^-4) / [CH3COOH]
[CH3COOH] = 0.028 M
Answer: 0.028 M</span>