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What will be the formula mass of CaCl2 (Ca = 40, Cl = 3.5)
- a)99 amu
- b)100 amu
- c)111 amu
- d)122 amu
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
What will be the formula mass of CaCl2 (Ca = 40, Cl = 3.5)a)99 amub)1...
Understanding Formula Mass of CaCl2
To find the formula mass of calcium chloride (CaCl2), we need to sum the atomic masses of all the atoms in the compound.
Components of CaCl2
- Calcium (Ca): The atomic mass is given as 40 amu.
- Chlorine (Cl): The atomic mass provided is 3.5 amu. However, this value seems incorrect as the actual atomic mass of chlorine is approximately 35.5 amu. For the sake of this explanation, we will use the provided value of 3.5 amu for calculation purposes.
Calculation of Formula Mass
1. Identify the Number of Atoms:
- There is 1 calcium atom in CaCl2.
- There are 2 chlorine atoms in CaCl2.
2. Calculate the Total Mass:
- Total mass from Calcium:
- 1 atom of Ca = 1 × 40 amu = 40 amu
- Total mass from Chlorine:
- 2 atoms of Cl = 2 × 3.5 amu = 7 amu
3. Sum the Masses:
- Total formula mass of CaCl2 = Mass from Ca + Mass from Cl
- Total formula mass = 40 amu + 7 amu = 47 amu
However, if you consider a more accurate atomic mass of Cl (35.5 amu), the calculation would be:
- Total mass from Cl = 2 × 35.5 amu = 71 amu
- Total formula mass = 40 amu + 71 amu = 111 amu.
Correct Answer
The correct answer is option 'C', which is 111 amu, based on the correct atomic mass of chlorine.
To find the formula mass of calcium chloride (CaCl2), we need to sum the atomic masses of all the atoms in the compound.
Components of CaCl2
- Calcium (Ca): The atomic mass is given as 40 amu.
- Chlorine (Cl): The atomic mass provided is 3.5 amu. However, this value seems incorrect as the actual atomic mass of chlorine is approximately 35.5 amu. For the sake of this explanation, we will use the provided value of 3.5 amu for calculation purposes.
Calculation of Formula Mass
1. Identify the Number of Atoms:
- There is 1 calcium atom in CaCl2.
- There are 2 chlorine atoms in CaCl2.
2. Calculate the Total Mass:
- Total mass from Calcium:
- 1 atom of Ca = 1 × 40 amu = 40 amu
- Total mass from Chlorine:
- 2 atoms of Cl = 2 × 3.5 amu = 7 amu
3. Sum the Masses:
- Total formula mass of CaCl2 = Mass from Ca + Mass from Cl
- Total formula mass = 40 amu + 7 amu = 47 amu
However, if you consider a more accurate atomic mass of Cl (35.5 amu), the calculation would be:
- Total mass from Cl = 2 × 35.5 amu = 71 amu
- Total formula mass = 40 amu + 71 amu = 111 amu.
Correct Answer
The correct answer is option 'C', which is 111 amu, based on the correct atomic mass of chlorine.
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Community Answer
What will be the formula mass of CaCl2 (Ca = 40, Cl = 3.5)a)99 amub)1...
1 (Ca) + 2 (Cl) = 40 + 2 × 35.5
= 111 amu
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What will be the formula mass of CaCl2 (Ca = 40, Cl = 3.5)a)99 amub)100 amuc)111 amud)122 amuCorrect answer is option 'C'. Can you explain this answer? for Class 9 2025 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about What will be the formula mass of CaCl2 (Ca = 40, Cl = 3.5)a)99 amub)100 amuc)111 amud)122 amuCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 9 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What will be the formula mass of CaCl2 (Ca = 40, Cl = 3.5)a)99 amub)100 amuc)111 amud)122 amuCorrect answer is option 'C'. Can you explain this answer?.
What will be the formula mass of CaCl2 (Ca = 40, Cl = 3.5)a)99 amub)100 amuc)111 amud)122 amuCorrect answer is option 'C'. Can you explain this answer? for Class 9 2025 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about What will be the formula mass of CaCl2 (Ca = 40, Cl = 3.5)a)99 amub)100 amuc)111 amud)122 amuCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 9 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What will be the formula mass of CaCl2 (Ca = 40, Cl = 3.5)a)99 amub)100 amuc)111 amud)122 amuCorrect answer is option 'C'. Can you explain this answer?.
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