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andrealch13p3w89f
17.12.2020 •
Chemistry
What do you already know about the structure of a water molecule?
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Ответ:
The key to understanding water's chemical behavior is its molecular structure. A water molecule consists of two hydrogen atoms bonded to an oxygen atom, and its overall structure is bent. This is because the oxygen atom, in addition to forming bonds with the hydrogen atoms, also carries two pairs of unshared electrons.
Explanation:
Ответ:
a) 132 g NaCl consumed at 1.5 Atm & 290K
b) 93.2 g NaCl consumed at STP
Explanation:
F₂ + 2NaCl => 2NaF + Cl₂
Given 18L F₂(g) at 1.5Atm & 290K
moles F₂(g) = PV/RT = (1.5Atm)(18L)/(0.08206L·Atm/mol·K)(290K) = 1.135 mol F₂(g) consumed
moles NaCl consumed = 2(moles F₂) = 2(1.135) mol NaCl = 2.269 mol NaCl
mass NaCl = 2.269 mol NaCl x 58 g/mol = 131.61 g ≅ 132 g consumed at 1.5 Atm & 290K
Given 18L F₂(g) - same volume as in part a - at STP
moles F₂(g) = PV/RT = (1.0Atm)(18L)/(0.08206L·Atm/mol·K)(273K) = 0.803 mol F₂(g) consumed
moles NaCl consumed = 2(moles F₂) = 2(0.803) mole NaCl = 1.607 mol NaCl
mass NaCl = 1.607 mol NaCl x 58 g/mol = 93.2 g NaCl consumed at STP