A scientific control is an experiment or observation designed to minimize the effects of variables other than the independent variable. This increases the reliability of the results, often through a comparison between control measurements and the other measurements.
1 mole of CaCl2 consists of 1 mole Ca2+ and 2 mole Cl–. If 1 mole of Cl– is 6.02 x 1023 Cl– ions, then 1 mole of CaCl2 contains (2 x 6.02 x 1023) Cl– ions or 1.20 x 1024 Cl– ions.
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<u>Answer: </u>The molar mass of solute is 115 g/mol.
<u>Explanation:</u>
Elevation in the boiling point is defined as the difference between the boiling point of the solution and the boiling point of the pure solvent.
The expression for the calculation of elevation in boiling point is:
OR
......(1)
where,
Boiling point of pure solvent (benzene) = 
Boiling point of solution = 
i = Vant Hoff factor = 1 (for non-electrolytes)
= Boiling point elevation constant = 
= Given mass of solute = 10 g
= Molar mass of solute = ? g/mol
= Mass of solvent = 200 g
Putting values in equation 1, we get:
Hence, the molar mass of solute is 115 g/mol.
The answer is"bonding molecular orbital".
There are types of molecular orbitals that are pi molecular orbitals, sigma molecular orbitals,bonding molecular orbitals and anti-bonding molecular orbitals. Bonding and anti-bonding molecular orbitals are opposite to each other as their name shows, bonding molecular orbitals is low in energy where the anti-bonding orbital is higher in energy.
Answer:
In roasting, air in large amounts, sometimes enriched with oxygen, is brought into contact with the sulfide mineral concentrate. This is done at elevated temperatures when oxygen combines with sulfur to form sulfur dioxide and with the metal to form oxides, sulfates and so on. ... Roasting is an exothermic reaction.
calcination as "heating to high temperatures in air or oxygen
Explanation:
