Answer: 6.6
Explanation: For steps pleaase go here https://www.percentagecal.com/answer/what-is-15-percent-of-44
This the chemical equation of the reaction of Al and HCl
Al + HCl → AlCl3 + H2 (g)
When you balance the atomos you get:
2Al + 6HCl → 2AlCl3 + 3H2 (g) ------- you can check that here you have the same number of atoms of Al, H, and Cl in both sides.
The coefficients are:
2 for Al, 6 for HCl, 2 for AlCl3 , and 3 for H2.
Then, the answer is: the coefficient of HCl is 6
Answer : The concentrations of hydroxide and hydronium ions in a solution with a pH of 10.2 are, and respectively.
Explanation : Given,
pH = 10.2
pH : It is defined as the negative logarithm of the hydrogen ion concentration.
First we have to calculate the hydrogen ion concentration
Now put the value of pH in this formula, we get the hydrogen ion concentration.
Now we have to calculate the pOH of the solution.
Now put the value of pH, we get the value of pOH.
Now we have to calculate the hydroxide ion concentration
Now put the value of pOH in this formula, we get the hydroxide ion concentration.
Therefore, the concentrations of hydroxide and hydronium ions in a solution with a pH of 10.2 are, and respectively.
Answer:
Calcium
Explanation:
The symbol for the element with a mass number of 27 is actually Al for Aluminum instead of Co for Cobalt. Mass number refers to atomic mass, not atomic number.
Aluminum has an atomic mass of 26.982 or 27.
The letters to unscramble are I, M, C, Al, U, and C.
The mystery element is Calcium.
Hope that helps.
Answer:
4 sig figs: 20.18
Explanation:
the smallest amount of digits was 4 in the expression