Answer:
4909.486Kj/mol
Explanation:
the heat would be required to change steam at 100°c to water at 100°c then change the water at that temperature to water at 0°c then change water at 0°c to ice at 0°c then ice at 0°c to ice at -15°c
Answer:
Balanced equation is: 2Na (s) + Cl₂(g) → 2NaCl (s)
Number of moles of needed Cl₂ → 0.217 moles
Mass of needed Cl₂ → 15.4 g
Explanation:
We determine the reaction
2Na (s) + Cl₂(g) → 2NaCl (s)
We convert the mass of solid Na to moles
10 g. 1 mol/23 g = 0.435 moles
Ratio is 2:1. 2 moles of Na react with 1 mol of chlorine
Then, 0.435 moles of Na may react with (0.435 . 1)/2 = 0.217 moles of Cl₂
Number of moles of needed Cl₂ → 0.217 moles
We convert the moles to mass → 0.217 mol . 70.9 g/1mol = 15.4 g
The right answer is B.
In proposition B, 0.00116 meters is equal to 1.16 millimeters.
In Proposition A, it is equal to 11.6 millimeters (1km = 1,000,000mm), the decimal point is six digits.
In Proposition C, 0.116dm is equal to 11.6 millimeters (1dm = 100mm), the decimal point is shifted by two digits.
In proposition D, 1.16cm is equal to 11.6 millimeters (1cm = 10mm), the decimal point is shifted by one digit.