Answer:
Explanation:
1. Atomic mass of T
To get the atomic mass of T, you calculate the weighted average of the atomic masses of the isotopes.
That is, you multiply the atomic mass of each isotope by a number representing its relative importance (e.g.., its percent of the total).
2. Identity of T
Lithium has an atomic mass of 6.64 u.
Element T is lithium.
Answer:
1.016 seconds
Explanation:
Let's bring out the parameters we were given in the question;
Rate constant k = 0.710 s^-1
Initial Concentration [A] = 0.820 M
Final concentration [A]o = 0.290 M
Time t = ?
Formular relating these parameters is given as;
ln[A] = ln[A]o − kt
Making t subject of interest, we have;
ln[A] - ln[A]o = -kt
kt = ln[A]o - ln[A]
t = (ln[A]o - ln[A]) / k
Substituting the values, we have;
t = ( ln(0.820) - ln(0.290) ) / 0.710
t = 0.7217 / 0.710
t = 1.016 seconds
Answer:
53.8 L
Explanation:
Ideal gas law
PV=nRT
must be for volume so we arrange to V=nRT/P
V= (4.8)(8.31)(297)/220
Answer: Option (A) is the correct answer.
Explanation:
A catalyst is a substance which helps in increasing the rate of a reaction without itself getting consumed in the reaction.
A catalyst lowers the activation energy of a reaction so that reactant molecules with less energy can easily participate into the chemical reaction and thus, product formation becomes faster.
Thus, we can conclude that adding a catalyst to the reaction would reduce the activation energy of a chemical reaction.