Answer:
There is 2.52 kJ of energy released (option 4)
Explanation:
Step 1: Data given
The enthalpy of fusion of methanol (CH3OH) is 3.16 kJ/mol
Mass of methanol = 25.6 grams
Molar mass of methanol = 32.04 g/mol
Step 2: Calculate moles of methanol
Moles methanol = mass methanol / molar mass methanol
Moles methanol = 25.6 grams / 32.04 g/mol
Moles methanol = 0.799 moles
Step 3: Calculate energy transfer
Energy transfer = moles * enthalpy of fusion
Energy = 0.799 moles * 3.16 kJ/mol
Energy = 2.52 kJ released
There is 2.52 kJ of energy released
Potassium itself is not a compound, it’s an element. Represented by “K” and has an atomic number of 19. However, it can be used to make a compound
1 mm ---------- 0.1 cm
38.2 mm ------ ?
38.2 x 0.1 / 1
= 3.82 cm
Density of an object is computed by dividing its mass by its volume. D = M / V
Solution:
D = 500 g / 2.75 cm3
D = 181.82 g/cm3
Further, density of an object is computed by dividing its mass by its volume. D = M / V
However, since Volume is the missing component in the equation. Mass of an object is divided by its density to get its volume. V = M / D
<span>Volume of Gold nugget = 50 g </span>/<span> 19.3g/cm3 = </span>2.59cm3
<span>Volume of Iron Pyrite nugget = 50 g </span>/ <span>5.0g/cm3 = </span>10cm3
