It depends ..........................................
Answer:
- 5.15×10²⁴ molecules of sulfur dioxide
- 3.63×10²³ molecules of carbon monoxide
- 6.02×10²³ molecules of ammonia
Explanation:
We begin from the relation that 1 mol of molecules contains NA of molecules
NA = 6.02×10²³
Now, we make rules of three:
1 mol has 6.02×10²³ molecules, therefore:
8.55 moles of SO₂ must have (8.55 . NA) / 1 = 5.15×10²⁴ molecules of dioxide
0.603 moles of CO must have (0.603 . NA) / 1 = 3.63×10²³ molecules of monoxide
Avogadro's Number of molecules of NH₃ are 6.02×10²³ molecules of ammonia
Half life is defined as the amount of time it takes for a radioactive material to divide itself into half after radioactive decay process. So basically, after the prescribed half-life, what transforms to another material is 1/2 of the original and what is left is 1/2 as well. In this case, the formula applicable is
ln N/No = -kt
where N represents the masses before and after decay, t is the time elapsed and k is the decay rate constant.
Substituting,
ln 10/40 = -k*20
-k = <span>-0.0693
To find t1/2 or half life, then
ln 0.5 = -k*t1/2
t1/2 = ln 0.5 / 0.0693 = 0.1 minutes
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Answer:
That's not possible. When a limiting reactant is called out in a stoichiometry problem, what that means is there's enough of all the other reactants for the limiting one to be completely consumed in the formation of product/products
The similarity between seen an object and seeing a shadow is their shape.
The shape of shadow of an object is always similar with object.
If object is in standing position, its image also is in standing position. The size of the shadow sometime greater than the object or less than the object. It never same.
If object is in sitting position, its image also is in sitting position.
If the source of light is on the back side, the shadows formed is in our front side and always act opposite to our activity.
For example, if we raise your left hand, the shadow appear to be raise right hand.
If the source of light is on the front side, the shadows formed is in back side and always act similar like us.
For example: if we raise your left hand, the shadow also appear to be raise left hand.
Everything changes at different position of source of light but shape never changes.
Thus, we concluded that similarity between seen an object and seeing a shadow is their shape.
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