The molecular mass of a compound is 63 u
The molecular mass of a compound is 63 u. If it contains one hydrogen atom and three oxygen atoms, the atomic mass of the remaining element is :
किसी यौगिक का आणविक द्रव्यमान 63 u है। यदि इसमें एक हाइड्रोजन परमाणु और तीन ऑक्सीजन परमाणु हैं, तो शेष तत्व का परमाणु द्रव्यमान __________है।
Detailed Solution & Logic
14 u
📘 Explanation
The molecular mass of a compound is the total mass of all atoms present in one molecule.
Molecular mass = 63,u
The compound contains:
1 Hydrogen atom
3 Oxygen atoms
1 unknown element
Atomic masses:
Hydrogen = 1,u
Oxygen = 16,u
Total mass contribution of known atoms:
$ 1 + (3 \times 16) = 1 + 48 = 49,u $
Let the atomic mass of the remaining element be $x$.
$49 + x = 63$
$x = 63 - 49$
$x = 14,u$
👉 Therefore, the atomic mass of the remaining element is 14 u.
📗 व्याख्या
आणविक द्रव्यमान किसी अणु में उपस्थित सभी परमाणुओं के द्रव्यमानों का योग होता है।
आणविक द्रव्यमान $= 63,u$
यौगिक में:
1 हाइड्रोजन परमाणु
3 ऑक्सीजन परमाणु
1 अज्ञात तत्व
परमाणु द्रव्यमान:
हाइड्रोजन = 1,u
ऑक्सीजन $= 16,u$
ज्ञात परमाणुओं का कुल द्रव्यमान:
$1 + (3 \times 16) = 49,u$
मान लें अज्ञात तत्व का द्रव्यमान $x$ है।
$49 + x = 63$
$x = 14,u$
👉 अतः शेष तत्व का परमाणु द्रव्यमान 14 u है।
⭐ Extra Facts / अतिरिक्त तथ्य
🔹 English
-
Atomic mass is measured in atomic mass unit (u).
-
1,u = $\dfrac{1}{12}$ of the mass of a carbon-12 atom.
-
An element with atomic mass near 14 u is Nitrogen (N).
🔹 Hindi
-
परमाणु द्रव्यमान की इकाई atomic mass unit (u) होती है।
-
1,u कार्बन-12 परमाणु के द्रव्यमान का $\dfrac{1}{12}$ भाग होता है।
-
लगभग 14,u परमाणु द्रव्यमान वाला तत्व नाइट्रोजन (N) होता है।
Similar Practice Questions
Which blood group is known as the Universal Donor?
Which blood group is known as the Universal Donor? किस रक्त समूह को सर्वदाता (Universal...
A train starts from rest and reaches a velocity of 36 km/hr in 3 minutes with uniform acceleration.
A train starts from rest and reaches a velocity of 36 km/hr in 3 minutes...
Which part of the ovule guides the pollen tube towards the female gamete?
Which part in the ovule helps in guiding the pollen tube (carrying sperm nuclei) towards...
In the electrolytic refining of copper, which
In the electrolytic refining of copper, which of the following correctly describes the role of...
What is the function of the secretions from the prostate gland and seminal vesicles in the male reproductive system?
What is the function of the secretions from the prostate gland and seminal vesicles in...
A certain force acting on a 20 kg mass changes its velocity from 5 m/s to 2 m/s.
A certain force acting on a 20 kg mass changes its velocity from 5 m/s...
Which of the following acts as an
Which of the following acts as an olfactory indicator in acid-base reactions? अम्ल – क्षारक...