Advertisements
Advertisements
प्रश्न
A sample of vitamic C is known to contain 2.58 ×1024 oxygen atoms. How many moles of oxygen atoms are present in the sample?
उत्तर
Number of oxygen atoms in the sample = 2.58 x 1024
= 2.58 × 1024
6.022 × 1023 atoms of oxygen = 1 mole
2.58 × 1024 atoms of oxygen = `(2.58 xx 10^24)/(6.022 xx 10^23)` moles
= 4.28 moles
APPEARS IN
संबंधित प्रश्न
The average atomic mass of a sample of an element X is 16.2 u. What are the percentages of isotopes `""_8^16X" and """_8^18X` in the sample?
ANSWER IN DETAIL
How are isobars different from isotopes ?
Define:- Atom
Write the names of the elements present in the:-
Sodium hydroxide
Write the names of `"FeS"` compounds :
Write the names of `"Na"_3"PO"_4` compounds :
Name two particles found inside the nucleus. What are they collectively called ?
Name the particle or particles you would expect to find in :
The orbit of an atom
Name the particle or particles you would expect to find in :
The nucleus of an atom
An atom has 13 protons and 14 neutrons.
What is the atomic mass of the atom ?
Define: An Atom:
State two observations which show that atom is not indivisible.
Give scientific reason.
All the mass of an atom is concentrated in the nucleus.
Name the gas that.
Turns moist starch iodide paper blue black.
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which element will gain electron?
The smaller particles found in the atom is called ______.
An element is composed of ______ atoms.
Write any two observations which support the fact that atoms are divisible.
The ______ are combination of atoms of various elements or the same element.
