Answer : The half-life of the compound is, 145 years.
Explanation :
First we have to calculate the rate constant.
Expression for rate law for first order kinetics is given by:
where,
k = rate constant = ?
t = time passed by the sample = 60.0 min
a = let initial amount of the reactant = 100 g
a - x = amount left after decay process = 100 - 25 = 75 g
Now put all the given values in above equation, we get
Now we have to calculate the half-life of the compound.
Therefore, the half-life of the compound is, 145 years.
Density = <u>mass
</u> volume
<u>
</u>For the sake of explanation, let's pretend the mass is 2g and the volume is 1 ml
<u>
</u>Density = <u>2 g </u>= 2 g/ml
<u /> 1 ml
Now if we increase the volume, and leave the mass the same then mass is still 2g, but we can increase the volume to 2 ml
Density = <u>2 g </u> = 1 g/ml<u>
</u> 2 ml
<u>
</u>Therefore we can say that <em>if volume increases and mass stays the same, then density will decrease</em>.<u>
</u>
Deforestation has had the least effect on aquatic life.
Is not adequate to prevent dehydration effects in the cell
