Answer:
2.46 × 10²⁵ atoms H
Explanation:
Avagadro's Number: 6.022 × 10²³
Step 1: Find formulas
Hydrogen - H
Ammonium Sulfide - (NH₄)₂S
Step 2: Use Dimensional Analysis
=
Step 3: Simplify
We have 3 sig figs.
2.45616 × 10²⁵ atoms H ≈ 2.46 × 10²⁵ atoms H
First, calculate for the amount of heat used up for increasing the temperature of ice.
H = mcpdT
H = (18 g)*(2.09 J/g-K)(50 K) = 1881 J
Then, solve for the heat needed to convert the phase of water.
H = (1 mol)(6.01 kJ/mol) = 6.01 kJ = 6010 J
Then, solve for the heat needed to increase again the temperature of water.
H = (18 g)(4.18 J/gK)(70 k)
H = 5266.8 J
The total value is equal to 13157.8 J
Answer: 13157.8 J
The one created by mandeleev is not in order of increasing the atomic number
