Argentum is the Latin name of
The Latin name of Silver is Argentum. The symbol of Silver is Ag.
Match the following with correct response.
What is the name given to 6.022 × 1023?
Fixed number of atoms or molecules present in gram atomic mass of an atom or molecules is 6.022 × 1023.Thisnumber is known as Avogadro constant.
Match the following with correct response.
The number of moles for 52g of He is:
(Atomic Mass of He: 4u)
Gram atomic mass of He = 4u
Therefore 52 g of He contains :
= 52 / 4
= 13 moles
Which of the following is anion?
A. Magnesium
B. Sulphate
C. Oxalate
D. Ammonium
C is the correct option.a negatively charged ion, i.e. one that would be attracted to the anode in electrolysis.
A. Magnesium (+2)
B. Sulphate (-2)
C. Oxalate (-2)
D. Ammonium(+1)
Hence, only B and C are Anions.
Calculate the number of particles in 0.01 mole of carbon atoms
One mole of carbon contains6.022 × 1023atoms of carbon. The number of particles present in 0.01 mole of carbon = 6.022 × 1023×0.01=6.022 × 1021atoms.
Match the following with correct response.
Phosphorus is a
Phosphorus is tetra-atomic. Each molecules of phosphorus contain 4 atoms.
What is the ratio of magnesium and Sulphur by mass in Magnesium sulphide?
Atomic mass of Magnesium is 12 and Sulphur is 16. Therefore, the ratio of Magnesium ans Sulphur by mass is 12:16 = 12/16 = 3:4.
A sample of CaCO3 conatins 3.01×1023 ions of Ca2+ and (CO3)2-.The mass of the sample is
The mass of one mole of CaCO3 is equal to 100 g. one mole of is equal to 6.022 × 1023ions. Therefore, mass of 3.01×1023 ions = 50 g
Which is not true about H2SO4?
A. It is composed of 2 Hydrogen, 1 Sulpher and 4 Oxygen atoms
B. It relative molecular mass is 98
C. It is composed of one molecule of H2 One atom S and two molecules O2
D. Its relative molecular mass is 108
98.07848 g mol
The formula for sulfuric acid is H2SO4. The molar mass of sulfuric acid is 98.07848 g mol.
How many times an atom Sulphur is heavier than an atom of carbon?
Atomic mass of Sulphur is 32 u and atomic mass of Carbon is 12 u. So, mass of Sulphur is 32/12 times heavier than Oxygen. = 8/3 times.
“Gram atomic mass of an element and the gram molecular mass of a compound contains the same number of molecules” is a
Gram atomic mass of an element and the gram molecular mass of a compound contain the same number of molecules, which is equal to6.022×1023molecules.
Which of the following is correct definition of a mole?
A. It is equal to the gram atomic mass of the substance
B. It contain 6.022×1020 atoms of a given substance
C. It is equal to gram molecular mass of the substance
D. It contain 6.022×1023 molecules of a given substance
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