Advertisements
Advertisements
प्रश्न
Calculate the number of moles in 12.044 × 1025 atoms of phosphorus.
Advertisements
उत्तर
12.044 × 1025 atoms of phosphorus
6.022 × 1023 atoms of phosphorus = 1 mole
12.044 × 1025 atoms of phosphorus = 12.044 × 1025/6.022 × 1023 = 199.9 moles or 200 moles
Hence, 12.044 × 1025 atoms of phosphorus have 200 moles.
APPEARS IN
संबंधित प्रश्न
TRUE \ FALSE
Elements combine in definite proportions to form compounds.
Write the names of the elements present in the following compound.
Common salt
Write the names of the elements present in the :-
Sulphuric acid
Write the names of the elements present in the:-
Glucose
Write the names of `"Ca"("NO"_3)_2` compounds :
Fill in the blank:
Atoms are _____
Name two particles found inside the nucleus. What are they collectively called ?
Write electronic configuration of oxygen, fluorine, sodium, silicon, argon.
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the atomic numebr of X ?
Name the three subatomic particles present in an atom.
Fill in the following blanks with suitable words :
In water, the proportion of oxygen and hydrogen is .............. by mass.
An atom of element E contains 3 protons, 3 electrons and 4 neutrons :
(a) What is its atomic number?
(b) What is its mass number?
(c) Write the electronic configuration of the element E.
(d) State whether element E is a metal or non-metal. Why?
(e) What type of ion, cation or anion, will be formed by an atom of element E? Why
(f) Write the symbol of the ion formed by an atom of element E.
(g) What could element X be?
For the symbols H, D and T, write the subatomic particles (protons, neutrons and electrons) found in each one of them.
Which of the following statement is correct about the atom of an element ?
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which will form positive ion?
Atoms of one element can be transmuted into atoms of other elements by ______
The number of atoms present in a molecule is called its ______.
Write any two observations which support the fact that atoms are divisible.
What is the fundamental particle of an element?
The ______ are combination of atoms of various elements or the same element.
