Answer:
207.89g
Explanation:
The formula of the compound is:
Fe₂S₃
Find the molar mass of the compound;
Atomic mass of Fe = 55.845g/mol
S = 32.065g/mol
Now;
Molar mass of Fe₂S₃ = 2 (55.845) + 3 (32.065)
= 207.89g
Answer: 50%
Explanation: 50% or more of plant and animal species on Earth are found in tropical rainforests.
Answer:
The new pressure of the gas is 57.69atm
Explanation:
P1 = 50 atm
T1 = 390K
T2 = 450K
P2 = ?
This problem requires pressure law.
Pressure law states that the pressure of a fixed mass of gas is directly proportional to its temperature provided volume remains constant.
Mathematically,
P = kT, k = P / T
P1 / T1 = P2 / T2 = P3 / T3 .......Pn /Tn
P1 / T1 = P2 / T2
Solve for P2,
P2 = (P1 * T2) / T1
P2 = (50 * 450) / 390
P2 = 57.69atm
The new pressure of the gas is 57.69atm
Answer:
178.5g of NaCl is the maximum amount that can be dissolved
Explanation:
Solubility is defined as the maximum amount of solute that can be dissolved in aAt 20°C, the solubility of NaCl is 35.7g per 100g of water at 20°C. That means the maximum amount that can be dissolved of NaCl is:
500g water * (35.7g NaCl / 100g water) =
<h3>178.5g of NaCl is the maximum amount that can be dissolved</h3>