The only nonmetal
that is liquid at room temperature is the element Br or Bromine. When we say at
room temperature, it means at zero degrees Celsius and at one atmospheric
pressure. The metal that is liquid at room temperature is the element Hg or
mercury.
Atomic no = no of electrons present in atom
and atomic mass = no of protons + no of neutrons
Answer:

Explanation:

Assume 1 kg water.
1. Moles of P.HCl
Then we have 4.666 mol of P.HCl
2. Mass of P.HCl
n = 4.666 mol × 272.77 g/mol = 1271.1 g
3. Total mass of solution
m = 1000 g + 1271.1 g = 2271.1 g solution
4. Volume of solution

5. Molar concentration


The final concentration after 172 seconds is 1.15 M. To obtain this answer, use the the integrated rate law for the order of reaction. Based on the problem, this is a second order reaction. The units of the rate constant also support that it is a second order reaction.
Further Explanation:
The solution to this problem is straightforward.
- Identify the integrated rate law for the corresponding order of reaction.
- Substitute the given values into the integrated rate law equation.
- Use algebra to solve for the unknown, C(f).
STEP 1: Since the reaction is a second order reaction, the integrated rate law will be:

where:
C(f) is the final concentration
k is the rate constant
t is the time
C(i) is the initial concentration
STEP 2: Plugging in the values given in the problem into the equation, the following equation should be obtained:

STEP 3: Using algebra to solve for C(f):

Since the given values only have 3 significant figures, the final answer must be expressed with 3 significant figures as well.
Therefore,

Learn More
- Learn more about half life brainly.com/question/4318844
- Learn more about first order reaction brainly.com/question/8139015
- Learn more about rate law brainly.com/question/1450796
Keywords: rate law, second order, integrated rate law
Im assuming that the 2 is a sub of the Al and not the # for O and that u made a type of AL which is Al
its been a while but
Al2O3 + 6HCl = 2ALCl3 + 3H2O