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laylac45531
10.10.2019 •
Chemistry
The goodyear blimp contains 5.74×10^6 l of helium at 25 °c and 1.00 atm. what is the mass in grams of the helium inside the blimp?
a. 2.30*10^6 g
b. 1.12*10^7 g
c. 2.34*10^5 g
d. 2.80*10^6 g
e. 9.39*10^5 g
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Ответ:
Explanation:
1) Data:
a) V = 5.74×10⁶ liter
b) T = 25°C = 25 + 273.15 K = 298.15 K
c) p = 1.00 atm
d) Helium ⇒ molar mass = 4.003 g/mol
2) Formulae:
a) pV = nRT
b) molar mass = mass in grams / n
3) Solution:
a) n = (pV) / (RT) =
= (1.00 tam × 5.74×10⁶ liter ) / (0.0821 atm-liter/mol-K) × 298.15K)
= 2.34495 ×10⁵ moles
b) Convert moles to mass in grams:
mass in grams = 4.003 g/ mol×2.34495 ×10⁵ moles = 9.39 × 10⁵g↑
answer
Ответ: