Answer:
Explanation:
as we know that 1dm3 =1000cm3
therefore x dm3 =120 cm3
1000X =1*120
X dm3 =120/1000=0.12
so 120 cm3 =0.12 dm3
now the number of moles of carbon dioxide at RTP is
moles =given volume(dm3)/standard volume at RTP
moles=0.12dm3/24
moles =5*10^-3
Answer: Option (B) is the correct answer.
Explanation:
Metals are the substances that have more number of electrons. Metals are good conductors of heat and electricity.
For example, iron, copper, zinc are all metals and good conductors of heat and electricity.
Whereas wood and foam are is a poor conductor of heat and electricity.
Thus, we can conclude that out of the given options copper and iron are good conductors of heat.
Answer:option D= 82.6°C
Explanation:
Step 1: determine the molality
Molality = moles of solute/ kg of solvent.
(Recall: number of moles= mass / molar mass).
Therefore, 375/256.5 g/mol = 1.4620 mole.
Substituting into the molality equation we have,
1.4620/ 0.1250kg = 11.696.
∆T(b) = k(b) × molality
∆T(b) = 82.6°C
