Density is mass/ volume so 1300/743x10^3=.00174966
Answer:
Matter cannot be created or destroyed in chemical reactions. This is the law of conservation of mass. In every chemical reaction, the same mass of matter must end up in the products as started in the reactants. Balanced chemical equations show that mass is conserved in chemical reactions.
Explanation:
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Proton and Neutron numbers within an atom cannot change, however, the electron number may change and form an ion. The answer is True
Answer:
A)Boiling point constant of benzene = 2.63°C/m
B) 242.77 g/mol is the molar mass of the solute.
Explanation:
where,
=Elevation in boiling point
= boiling point constant od solvent= 3.63 °C/m
1 - van't Hoff factor
m = molality
A) Mas of solvent = 500 g = 0.500 kg
T = 80.1°C , =82.73°C
= 82.73°C - 80.1°C = 2.63°C
Boiling point constant of benzene = 2.63°C/m
B) Mass of solute = 1.2 g
Molar mas of solute = M
Mass of solvent = 50 g= 0.050 kg
i = 1
T = 80.1°C , =80.36°C
=80.36°C - 80.1°C = 0.26°C
M = 242.77 g/mol
242.77 g/mol is the molar mass of the solute.