I would have to say the best answer would be two
Answer:
True
Explanation:
In a chemical reaction, there's usually something to do with the composition of the substance. In a physical reaction, the effect could have something to do with appearance or smell.
Hope this helps!
Either B or C
Explanation ;
Adhesion of water to the surface of a material will cause an upward force on the liquid. The surface tension acts to hold the surface intact. Capillary action occurs when the adhesion to the surface material is stronger than the cohesive forces between the water molecules.
Answer: The half-life of the compound is 93 minutes
Explanation:
Expression for rate law for first order kinetics is given by:
![t=\frac{2.303}{k}\log\frac{a}{a-x}](https://tex.z-dn.net/?f=t%3D%5Cfrac%7B2.303%7D%7Bk%7D%5Clog%5Cfrac%7Ba%7D%7Ba-x%7D)
where,
k = rate constant
t = age of sample
a = let initial amount of the reactant =100
a - x = amount left after decay process = (100-36) = 64
a) for completion of 36 % of reaction
![60=\frac{2.303}{k}\log\frac{100}{100-36}](https://tex.z-dn.net/?f=60%3D%5Cfrac%7B2.303%7D%7Bk%7D%5Clog%5Cfrac%7B100%7D%7B100-36%7D)
![k=\frac{2.303}{60}\log\frac{100}{64}](https://tex.z-dn.net/?f=k%3D%5Cfrac%7B2.303%7D%7B60%7D%5Clog%5Cfrac%7B100%7D%7B64%7D)
![k=0.0074min^{-1}](https://tex.z-dn.net/?f=k%3D0.0074min%5E%7B-1%7D)
b) for completion of half life:
Half life is the amount of time taken by a radioactive material to decay to half of its original value.
![t_{\frac{1}{2}}=\frac{0.693}{k}](https://tex.z-dn.net/?f=t_%7B%5Cfrac%7B1%7D%7B2%7D%7D%3D%5Cfrac%7B0.693%7D%7Bk%7D)
![t_{\frac{1}{2}}=\frac{0.693}{0.0074min^{-1}}=93min](https://tex.z-dn.net/?f=t_%7B%5Cfrac%7B1%7D%7B2%7D%7D%3D%5Cfrac%7B0.693%7D%7B0.0074min%5E%7B-1%7D%7D%3D93min)
The half-life of the compound is 93 minutes