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uysha [10]
3 years ago
14

How many moles of 90gm of water

Chemistry
1 answer:
Rama09 [41]3 years ago
4 0
Molar mass H2O = <span>18.01 g/mol

1 mole H2O ---------- 18.01 g
?? moles H2O -------- 90 g

90 x 1 / 18.01 => 4.997 moles</span>
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7 0
3 years ago
Read 2 more answers
The reaction C4H8(g)⟶2C2H4(g) C4H8(g)⟶2C2H4(g) has an activation energy of 262 kJ/mol.262 kJ/mol. At 600.0 K,600.0 K, the rate c
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\log (\frac{K_2}{K_1})=\frac{Ea}{2.303\times R}[\frac{1}{T_1}-\frac{1}{T_2}]

where,

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T_2 = final temperature = 785.0K

Now put all the given values in this formula, we get:

\log (\frac{K_2}{6.1\times 10^{-8}s^{-1}})=\frac{262000J/mole}{2.303\times 8.314J/mole.K}[\frac{1}{600.0K}-\frac{1}{785.0K}]

K_2=1.45\times 10^{-2}s^{-1}

Therefore, the rate constant at 785.0 K is, 1.45\times 10^{-2}s^{-1}

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