It's any of the almost spherical concentric regions of matter that make up the earth and it's atmosphere, as the lithosphere and hydrosphere.
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1. True
2. False
3. False
4. True
5. True
6. False
7. True
8. True
9. True
10. Base
11. Acid
12. Base
13. Acid
14. Neutral
Answer:
8.625 grams of a 150 g sample of Thorium-234 would be left after 120.5 days
Explanation:
The nuclear half life represents the time taken for the initial amount of sample to reduce into half of its mass.
We have given that the half life of thorium-234 is 24.1 days. Then it takes 24.1 days for a Thorium-234 sample to reduced to half of its initial amount.
Initial amount of Thorium-234 available as per the question is 150 grams
So now we start with 150 grams of Thorium-234
So after 120.5 days the amount of sample that remains is 8.625g
In simpler way , we can use the below formula to find the sample left
Where
is the initial sample amount
n = the number of half-lives that pass in a given period of time.
Answer: acetone is a ketone and not an aldehyde. Therefore it's false
Explanation:
Acetone is of structure CH3-CO-CH3
which makes it a ketone.
Both aldehyde and ketone have a carbonyl group but there is difference between aldehyde and ketone.
Aldehydes have a general formula R-CHO
where R is a methyl group including H atom, and CHO is the functional group.
While
Ketone have the general formula R-CO-Ri
where R and Ri are methyl groups excluding H atom, and CO is the functional group.
Hint: ketones usually end with the suffix "one" as in acetone.
Answer: similarities
- there are some cases where the element confer some of its own properties to the compound, so there are properties which are similar between the element and the compound, for example when an element is strongly charged with electrons, the element confer this property to the compound, and this similar between them.
- the other similarity is that both, the compound and element are formed of atoms, electrons and neutrons.
differences
The principal difference is that a element is conformed only by one element but a compound can be conformed for more than two elements.
Explanation: similarities
- there are some cases where the element confer some of its own properties to the compound, so there are properties which are similar between the element and the compound, for example when an element is strongly charged with electrons, the element confer this property to the compound, and this similar between them.
- the other similarity is that both, the compound and element are formed of atoms, electrons and neutrons.
differences
The principal difference is that a element is conformed only by one element but a compound can be conformed for more than two elements.