The specific heat capacity of ethanol is 2.46 joules per gram.
Now, we may use the equation:
Energy = mass * specific heat capacity * change in temperature
Here we may substitute:
mass = density * volume
Energy = density * volume * specific heat capacity * change in temperature
720 = 0.789 * 35 * 2.46 * ΔT
ΔT = 10.6
The final temperature will be
20 + 10.6
= 30.6 °C
Answer:
The percentage by mass of benzene in the solution is approximately 0.2%
Explanation:
The given parameters are;
The mass of the benzene solute dissolved in the gasoline solvent, m₁ = 1.56 g
The total volume of the benzene gasoline solution made, V = 998.44 mL
The density of gasoline, ρ = 0.7489 g/mL
Mass, m = Density, ρ × Volume, V
∴ The mass of gasoline in the 998.44 mL, solution = 0.7489 g/mL × 998.44 mL = 747.731716 g
The total mass of the solution = The mass of the benzene in the solution + The mass of the gasoline in the solution
∴ The total mass of the solution = 747.731716 g + 1.5 g = 749.231716 g

The percentage by mass of benzene in the solution = (1.5 g/749.231716 g)×100 ≈ 0.2% by mass.
Answer:For jewellery and ornaments, gold, platinum and silver are being used.
For building purposes, iron and steel can be used.Iron and aluminium are used as utensils.
The thermometer uses mercury and helps to monitor the temperature.
The insulation wires are made of aluminium.
Aluminium foils are being used as wrappers for food.In sweets, a silver foil is being used.
To avoid rusting, zinc is used for galvanizing.In vehicles, iron is being used.
For making cable wires, copper is being used.
Explanation:
93.21 miles hope this is correct and hoped I helped you