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Answer:
1. The law of multiple proportions states that when two elements form two or more compounds between them, the ratio of the masses of the second element in each compound can be expressed in the form of small whole numbers. This law was proposed by John Dalton, and it is a combination of the previous laws.
2. Dalton's atomic theory was the first complete attempt to describe all matter in terms of atoms and their properties. ... The first part of his theory states that all matter is made of atoms, which are indivisible. The second part of the theory says all atoms of a given element are identical in mass and properties.
3. In chemistry, the molar mass of a chemical compound is defined as the mass of a sample of that compound divided by the amount of substance in that sample, measured in moles. ... In the International System of Units (SI), the base unit of molar mass is kg/mol.
4. M = m/n
M = molar mass
m = mass of a substance (in grams)
n = number of moles of a substance
5. 1 120.366 g/mol
5.2 84.3139 g/mol
5.3 136.14 g/mol
5.4 310.18 g/mol
6 .1 Thus no. of moles = 287 = 0.25.
6.2 Moles = 8/32 = 1/4 moles.
6.3 0.749838103136826mol
6.4 0.09999213157154761mol
Explanation: