Answer:
Solar energy is required in the process known as photosynthesis
Explanation:
Photosynthesis is the process whereby solar energy is utilised as chemical energy to convert water and carbon dioxide into glucose alongside oxygen which is a byproduct of the reaction.
6CO2 (g)+ 6H2O(l) → C6H12O6(s) + O2(g)
The thermometer operates under the concept of the Zeroth Law of Thermodynamics. The thermometer displays the temperature of its surroundings, regardless of the identity of the substance. So, if the water is 20°C, then the thermometer displays 20°C.
Answer:
129 g
Explanation:
The radioactive decay of a substance can be represented through the following expression.
where,
A is the amount of A at certain time t
A₀ is the initial amount of A
k is the rate constant
We can find k from the half-life (t1/2) using the following expression.
<em>If 22.8 g of the substance is currently present, what mass A₀ was present 8.00 hours ago?</em>
Explanation:
The speed of molecules increases when temperature is increased as it will result in more number of collisions between the molecules. Thus, there will be increase in kinetic energy of molecules and increase in the speed of solvent molecules.
Whereas on decreasing the temperature, the kinetic energy of molecules will decrease. This will result in less number of collisions between the molecules. Therefore, the speed of solvent molecules will slow down.
