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Scilla [17]
3 years ago
11

Half-life is always given in units of time

Chemistry
1 answer:
ad-work [718]3 years ago
5 0
Yes, half life is always given in units of time, hope this helps
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The isomerization reaction, ch3nc → ch3cn, is first order and the rate constant is equal to 0.46 s-1 at 600 k. what is the conce
Harlamova29_29 [7]
According to this formula :
㏑[A] /[Ao] = - Kt 
when we have Ao = 0.3 m 
and K =0.46 s^-1
t = 20min = 0.2 x 60 =12 s
So by substitution :
㏑[A] / 0.3 = - 0.46 * 12
㏑[A] / 0.3 = - 5.52
by taking e^x for both side of the equation we can get [A]
∴[A] = 0.0012 mol dm^-3
6 0
3 years ago
Which one of these best defines climate
lisabon 2012 [21]

Answer:

Long term condition of the atmosphere

Explanation:

I think this is right.

I hope this helps! (✿◕‿◕✿)

3 0
3 years ago
Calculate the mass of Octane needed to release 6.20 mol Co2
n200080 [17]
The combustion reaction of octane is as follow,

                           C₈H₁₈  +  25/2 O₂     →     8 CO₂  +  9 H₂O

According to balance equation,

8 moles of CO₂ are released when  =  114.23 g (1 mole) Octane is reacted

So,

      6.20 moles of CO₂ will release when  =  X g of Octane is reacted

Solving for X,
                                     X  =  (114.23 g × 6.20 mol) ÷ 8 mol

                                     X  =  88.52 g of Octane
Result:
           88.52 g of Octane is needed to release 6.20 mol CO₂.
8 0
3 years ago
Which interaction is responsible for the force of attraction between the particles in a salt crystal? proton-proton proton-elect
Mars2501 [29]
The answer is B. proton-electron.

3 0
3 years ago
Read 2 more answers
The molarity of a solution that contains 0.50 moles of naoh in 200.0 milliliters of water is
NARA [144]
200.0 mL =0.2000 L
Molarity = number of mole solute / volume solution(L)  = 0.50 mol/0.2000 L=
= 2.5 mol/L =2.5M

Answer : 2.5 M


5 0
3 years ago
Read 2 more answers
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