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kow [346]
3 years ago
9

Which describes radioactive decay of a substance? More of the radioactivity is lost during the first half-life than in later hal

f-lives. More of the radioactivity is lost during the fourth half-life than in the first half-life. Isotopes are the most stable during the first half-life. Isotopes are the least stable during the later half-lives.
Chemistry
2 answers:
Alja [10]3 years ago
8 0

Answer:

Yes, A.) "More of the radioactivity is lost during the first half-life than in later half-lives."  is the correct answer!!

Explanation:

I took the practice test on edge

vovangra [49]3 years ago
5 0

Answer:More of the radioactivity is lost during the first half-life than in later half-lives.

Explanation: Passed test with 98

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Which of the following might be in for a rough orbit around the Sun because of debris in their paths? (Choose all that apply.)
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Answer:

cerus neptune and eris

Explanation:

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Determine whether the statement is true or false, and why. "If a theory becomes supported by evidence, it can become a law."
loris [4]

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Explanation:

A  "Theory" and  a'' Law" in scientific method are already both supported by evidence but they have different function,

The function of  " Theory" in scientific method is to give an explanation to the observations and findings gathered during the process. It can be modified, improved or even rejected as more information is being gathered.

While a '' Law '' tends to describe an observed event in nature that is true whenever it is put to test. It does not explain why the occurence or event is true.

5 0
3 years ago
How does gravity affect the inner planets? (site 2)<br><br>                 <br><br>​
ikadub [295]

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7 0
3 years ago
Read 2 more answers
How many grams of potassium chlorate must be heated to produce 30.0g of oxygen? socratic.org
DanielleElmas [232]

Answer:

76.56g

Explanation:

Firstly, to do this we need a correct and balanced equation for the decomposition of potassium chlorate.

2KClO3 —-> 2KCl + 3O2

From the balanced equation, we can see that 2 moles of potassium chlorate yielded 3 moles of oxygen gas

We need to know the actual number of moles of oxygen gas produced. To do this, we divide the mass of the oxygen gas by its molar mass. Its molar mass is 32g/mol

The number of moles is thus 30/32 = 0.9375 moles

Now we can calculate the number of moles of potassium chlorate decomposed.

We simply do this by (0.9375 * 2)/3 = 0.625 moles

Now to get the number of grammes of potassium chlorate decomposed, we simply multiply this number of moles by the molecular mass. The molecular mass of KClO3 is 39 + 35.5 + 3(16) = 122.5g/mol

The amount in grammes is thus 122.5 * 0.625 = 76.56g

5 0
3 years ago
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C8H10N4O2 is the chemical formula for caffeine, there are 8 carbons. List the 3 remaining elements in caffeine and how many atom
Nataly [62]
Caffeine   that  is C8H10N402  is molecule which made   up  of   4 different elements. apart  from  carbon  the  other  element  includes

element        symbol
nitrogen          N
oxygen           O
hydrogen        H
The number  of  atom  present in caffeine molecule  are  as follows

Nitrogen=4  atoms
Oxygen=2  atoms
Hydrogen=10 atoms

4 0
3 years ago
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