The Calories on a food label indicate the
1 answer:
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Answer:
a: before equivalence point
b: equivalence point
c: before equivalence point
d: after the eqivalence point
e: before equivalence point
f: after the eqivalence point
Explanation:
Balanced equation of reaction:
NaOH +HCl =NaCl +H2O;
Volume of HCl is fixed and it 100ml and concentration is 1.0M
N1 and N2 normality of HCl and NaOH respectively;
V1 and V2 volume of HCl and NaOH respectively;
we have given molarity but we need normality;
<em>but in case of NaOH and HCl n-factor is 1 for each.</em>
hence
normality=molarity;
At equivalence point:
Before equivalence point :
After the equivalence point:
case a: 5.00 mL of 1.00 M NaOH
hence it is before equivalence point
case b: 100mL of 1.00 M NaOH
hence it is equivalence point
case c: 10.0 mL of 1.00 M NaOH
hence it is before equivalence point
case d: 150 mL of 1.00 M NaOH
hence it is after the eqivalence point
case e: 50.0 mL of 1.00 M NaOH
hence it is before equivalence point
case f: 200 mL of 1.00 M NaOH
hence it is after the eqivalence point
Answer:
Explanation:
The molar mass is the mass of a substance in grams per mole.
To find it, add the mass of each element in the compound. These masses can be found on the Periodic Table.
The compound given is:
The compound has 1 Ca (calcium) and 2 Cl (chlorine).
Mass of Calcium
- The molar mass of calcium is 40.08 g/mol
- There is only one atom of Calcium in CaCl₂, so the number above is what we will use.
Mass of Chlorine
- The molar mass of chlorine is 35.45 g/mol
- There are two atoms of chlorine in CaCl₂, therefore we need to multiply the molar mass by 2.
- 35.45 * 2= 70.9 g/mol
Molar Mass of CaCl₂
- Now, to find the molar mass, add the molar mass of 1 calcium and 2 chlorine.
- 40.08 g/mol + 70.9 g/mol =110.98 g/mol
The molar mass of CaCl₂ is <u>110.98 grams per mole. </u>