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MrRissso [65]
2 years ago
6

According to Charles Law, if you have a balloon inside a car at noon during a hot summer day the balloon molecules inside will i

ncrease in pressure.
A. true
B. false
Chemistry
1 answer:
3241004551 [841]2 years ago
8 0
I think it will decrease ( like with a party balloons as the day goes by they get softer ) I hope I helped you .
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A chemical is said to be stable if it is difficult to get it to react. This property of a chemical is a __________ property.
ivann1987 [24]

Answer:

physical

Explanation:

<h2><u>Fill in the blanks </u></h2>

A chemical is said to be stable if it is difficult to get it to react. This property of a chemical is a <u>physical</u>  property

4 0
2 years ago
An unknown radioactive substance has a half-life of 3.20hours . If 46.2g of the substance is currently present, what mass A0 was
iogann1982 [59]

Answer:

a) a0 was 46.2 grams

b) It will take 259 years

c) The fossil is 1845 years old

Explanation:

<em>An unknown radioactive substance has a half-life of 3.20hours . If 46.2g of the substance is currently present, what mass A0 was present 8.00 hours ago?</em>

A = A0 * (1/2)^(t/h)

⇒ with A = the final amount = 46.2 grams

⇒ A0 = the original amount

⇒ t = time = 8 hours

⇒ h = half-life time = 3.2 hours

46.2 = Ao*(1/2)^(8/3.2)

Ao = 261.35 grams

<em>Americium-241 is used in some smoke detectors. It is an alpha emitter with a half-life of 432 years. How long will it take in years for 34.0% of an Am-241 sample to decay?</em>  

t = (ln(0.66))-0.693) * 432 = 259 years

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<em>A fossil was analyzed and determined to have a carbon-14 level that is 80% that of living organisms. The half-life of C-14 is 5730 years. How old is the fossil?</em>

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7 0
3 years ago
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Maru [420]

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2 years ago
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Soloha48 [4]

random.

Hope this helps!

8 0
3 years ago
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Which is a positive effect of using chemistry?
bogdanovich [222]

The positive effect of using chemistry is the generation of energy without fossil fuels.

Chemistry is the branch of science that deals with the study of the nature, properties and composition of matter as well as the changes that matter undergoes. Chemistry has really contributed positively to the advancement of the society.

Lately, there has been a lot of emphasis on alternative sources of energy apart from fossil fuels. One such options is the use of hydrogen fuels. Chemistry has been at the forefront of this research.

Hence, one positive effect of using chemistry is that energy can be generated without burning fossil fuels.

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