Given :
560 gram of silicon dioxide.
To Find :
Number of moles of silicon dioxide in 560 gram.
Solution :
We know, molecular mass silicon dioxide is 60 gram/mol.
So, number of moles of silicon dioxide in 560 gram is :
Now, one mole of any compound contain .
So, number of molecules in 9.33 moles of silicon dioxide is :
Hence, this is the required solution.
Half life formula
The number of unstable nuclei remaining after time t can be determined according to this equation:
N(t) = N(0) * 0.5^(t/T)
where:
N(t) is the remaining quantity of a substance after time t has elapsed.
N(0) is the initial quantity of this substance.
T is the half-life.
It is also possible to determine the remaining quantity of a substance using a few other parameters:
N(t) = N(0) * e^(-t/τ)
N(t) = N(0) * e^(-λt)
τ is the mean lifetime - the average amount of time a nucleus remains intact.
λ is the decay constant (rate of decay).
All three of the parameters characterizing a substance's radioactivity are related in the following way:
T = ln(2)/λ = ln(2)*τ
How to calculate the half life
Determine the initial amount of a substance. For example, N(0) = 2.5 kg.
Determine the final amount of a substance - for instance, N(t) = 2.1 kg.
Measure how long it took for that amount of material to decay. In our experiment, we observed that it took 5 minutes.
Input these values into our half life calculator. It will compute a result for you instantaneously - in this case, the half life is equal to 19.88 minutes.
If you are not certain that our calculator returned the correct result, you can always check it using the half life formula.
The pit that marks the location of the umbilical cord after birth is known as the navel or belly button. All animals that grow placenta during fetal development will have a navel or belly button. The scientific name of the structure is the umbillicus. It can be a depression in some individuals or raised in others.
Answer: Option C
Explanation: The balanced chemical equation that explains photosynthesis is stated below:
6CO2(g) + 6H20(g) --------> C6H12O6 + 6O2(g) + energy (in from of ATP)
From the equation, 6 atoms of carbon C are contained in 6 moles of atmospheric Carbondioxide CO2, that reacted with 6 moles of water molecules H2O, contained in plant cells to yield 1 mole of glucose C6H12O6 and chemical energy in the form of ATP (adenosine triphosphate)
Cellular respiration and photosynthesis are important parts of the carbon cycle. The carbon cycle is the pathways through which carbon is recycled in the biosphere. While cellular respiration releases carbon dioxide into the environment, photosynthesis pulls carbon dioxide out of the atmosphere.