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Doss [256]
3 years ago
14

How to write a balanced chemical equation for the standard formation reaction of liquid octanol?

Chemistry
1 answer:
garri49 [273]3 years ago
3 0
To write a balanced chemical equation for the standard formation reaction of liquid octanol form the octanol from its elements — C, H, and O.

The standard enthalpy of formation of a compound is the change in enthalpy when 1 mol of the compound is formed from its constituent elements. All substances must be in their most stable states at 100 kPa and 25 °C.

write a thermochemical equation for the formation of 1 mol of octanol.

8C(s) + 9H₂(g) + ½O₂(g) → C₈H₁₇OH(l)

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a sample that has a half life of 45 years take ____ for the count rate to drop from 600 cpm to 150 cpm
Bond [772]

Answer:

90yrs

Explanation:

Half life is the time taken for half of an original radioactive material to decay by half.

For the sample;

    Half - life = 45yrs

  Original amount  = 600cpm

 

                 Start                                  Number of atoms    

                 0yrs                                                600cpm

                                   First half life

                 45yrs                                              300cpm

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                 90yrs                                               150cpm

5 0
3 years ago
Les étapes nous permettant de sentir une tarte aux pommes
Dmitry [639]

Answer:

L'ordre correct est le suivant;

1. Les cils olfactifs capturent les molécules chimiques odorantes

2. Le signal des molécules chimiques est transformé en impulsions nerveuses

3. L'influx nerveux est transféré au cerveau par le nerf olfactif au bulbe olfactif du cerveau antérieur

4. Les odeurs sont perçues

Explanation:

Pour sentir la pomme, l'air autour de la pomme est inhalé rapidement pour aider les produits chimiques odorants à entrer dans la cavité nasale.

La cavité nasale a des cellules spéciales qui sont réceptives aux produits chimiques odorants, qui envoient un message au cerveau lors de la liaison au produit chimique par le nerf olfactif. Lorsque le message arrive au bulbe olfactif du cerveau antérieur, il est analysé et l'odeur est identifiée et / ou reconnue.

Par conséquent, l'ordre correct est le suivant;

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3. 4. L'influx nerveux est transféré au cerveau par le nerf olfactif au bulbe olfactif du cerveau antérieur

4. 3. Les odeurs sont perçues.

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