Answer:
60.7%
Explanation:
Molar mass of NaCl = 23 +35.5
= 58.5 g/mol
Molar mass of Cl = 35.5 g/mol
Percentage by mass of Cl =?
The percentage by mass of Cl in NaCl can be obtained as shown below'
Percentage by mass = mass of element / mass of the compound × 100
Percentage by mass of Cl
= 35.5 / 58.5 × 100
= 3550 / 58.5
= 60.7%
Therefore, the percentage by mass of Cl in NaCl is 60.7%
A substance which turns universal indicator blue. It’s not pH 1 cause it’s acidic. And pH 7 is neutral not alkali.
Hope u understood.
Pls give me the brainliest
Answer : Combustion reactions are those reactions which includes reacting with the oxygen along with the reactant.
Here, the reactant is cooking fat.
So when a long chain hydrocarbon which is cooking fat here reacts with oxygen the products obtained are carbon dioxide and water molecule.
One mole of fat reacts with 70 moles of oxygen and gives 51 moles of carbon dioxide and 44 moles of water molecule.
Step 1: Write the chemical formula.
Step 2: List all the atoms.
<span>Step 3: </span>Count<span> the number of </span>atoms<span> of each element in 1 molecule.
Step 4: Multiply the number of </span>atoms<span> of each by the coefficient.
Step 5: Make sure your answer makes sense.</span>
Answer:
7,1x10⁻⁵M = [OH⁻]
Explanation:
pH is the -log of hydronium ion. pOH is -log of hydroxide ion. Knowing pH + pOH = 14:
14 = 9,85 + pOH
pOH = 14 - 9,85
pOH = 4,15
-log [OH⁻] = 4,15
10^-4,15 = [OH⁻]
<em>7,1x10⁻⁵M = [OH⁻]</em>
<em></em>
I hope it helps!