First, we need to assume acetylene to adapt an ideal gas behavior. So, we can use the Ideal Gas Law:
PV = nRT
Given:
V = 42 L
T = 305 K
P = 780 torr = 1.026 atm
R = gas constant, 0.0821 L atm/ mol K
n = amount of gas in the canister
1.026 atm * 42 L = n * 0.0821 L atm/mol K * 305 K
n = 1.72 moles of gas
Explanation:
b. Bromo cyclopentane + HBr
C+2H2 -------> CH4
from reaction 2 mol 1 mol
from the problem x mol 10 mol
x=2*10/1 = 20 mol
Answer: 20 mol of H2.
Answer:
The drinks that the student should avoid - if he wants to avoid damage to his teeth - are drinks C and E, since they are acidic, according to their pH.
Explanation:
pH measures the acidity or alkalinity of a solution, taking into account the amount of hydrogen ions present in it, and established on a scale that goes from 0 to 14.
In chemistry, pH is derived from the formula that indicates:
<em>pH = - Log₁₀ αH⁺</em>
, where α is the activity of hydrogen ions.
A solution with a pH of 7 is considered neutral, above this value it is an acidic solution and below this value it is called acidic.
According to this:
- <em>Acidic drinks are: drink C (5.3) and E (2.4).</em>
- <em>The basic drinks are: drink A (11.9) and drink D (9.8).</em>
- <em>The neutral drink is the drink B (7), which corresponds to water.</em>
