Answer : The one mole atom of carbon is not equal to 1 mole of substance.
Explanation :
As we know that,
number of hydrogen molecules present in 1 mole of substance.
and,
At STP, 22.4 L volume of hydrogen gas present in 1 mole of substance
and,
number of sodium molecules present in 1 mole of substance.
and,
number of gold molecules present in 1 mole of substance.
All these options are equal to the 1 mole of substance.
While the option, one mole atom of carbon is not equal to the 1 mole of substance because 1 mole of atom of carbon is equal to 12 grams.
Hence, the one mole atom of carbon is not equal to 1 mole of substance.
The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus. The number of neutrons is equal to the difference between the mass number of the atom (M) and the atomic number (Z).
Answer:
What is the matrix used in lithography? Lithography is a planographic or "flat surface" method that uses a stone slab matrix. Unlike relief and intaglio printing, the matrix used in lithography is completely flat. Serigraphy is also known as "silkscreen painting".
Explanation:
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Answer:
44.8 litres is the answer to the question
Answer:
A) 2.27 grams of tungsten trioxide must be needed to prepare 1.80 g of tungsten.
B)To prepare 1.80 g of tungsten we will need 0.0587 grams of hydrogen gas.
Explanation:
A) Mass of tungsten prepared = 1.80 g
Moles of tungsten =
According to reaction, 1 mol of tungsten is obtained from 1 mole of tungsten trioxide.
Then 0.009783 moles of tungsten will be obtained from:
of tungsten trioxide
Mass of 0.009783 moles of tungsten trioxide :
0.009783 mol × 231.8 g/mol = 2.27 g
2.27 grams of tungsten trioxide must be needed to prepare 1.80 g of tungsten.
B) According to reaction,1 mol of tungsten is produced by 3 moles of hydrogen gas
Then 0.009783 moles of tungsten are produced by :
Mass of 0.02935 moles of hydrogen gas:
0.02935 mol × 2 g/mol =0.0587 g
To prepare 1.80 g of tungsten we will need 0.0587 grams of hydrogen gas.