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stealth61 [152]
3 years ago
8

PLEASE HELP!!!!!!!!! 20 points! Which would be best categorized as heat transfer by convection? Usuing a heat blanket to get war

m Touching a metal spoon that's boiling in water Noodles rising and falling apart in boiling water Wearing a white shirt to stay cool on a summer day PLEASE HELP!!!!!!!!! 20 points!
Chemistry
2 answers:
Maslowich3 years ago
7 0
Noodles rising and falling apart
Ghella [55]3 years ago
3 0
I'd say the correct answer is: Noodles rising and falling apart in boiling water.
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Assertion (A): An orbital cannot have more than two electrons, moreover, if an orbital has two electrons they must have opposite
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Answer: Its option "A" Both A and R are true and R is the correct explanation of A.

Hope it helps

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3 years ago
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The number of protons in an atom is known as its atomic
Fynjy0 [20]
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4 0
3 years ago
The half-life of radioactive substance is 2.5 minutes. what fraction of the origional radioactive remains after 10 mins
saul85 [17]
The answer is 1/16.

Half-life is the time required for the amount of a sample to half its value.
To calculate this, we will use the following formulas:
1. (1/2)^{n} = x,
where:
<span>n - a number of half-lives
</span>x - a remained fraction of a sample

2. t_{1/2} = \frac{t}{n}
where:
<span>t_{1/2} - half-life
</span>t - <span>total time elapsed
</span><span>n - a number of half-lives
</span>
So, we know:
t = 10 min
<span>t_{1/2} = 2.5 min

We need:
n = ?
x = ?
</span>
We could first use the second equation to calculate n:
<span>If:
t_{1/2} = \frac{t}{n},
</span>Then: 
n = \frac{t}{ t_{1/2} }
⇒ n = \frac{10 min}{2.5 min}
⇒ n=4<span>
</span>
Now we can use the first equation to calculate the remained fraction of the sample.
<span>(1/2)^{n} = x
</span>⇒ x=(1/2)^4
<span>⇒x= \frac{1}{16}</span>
3 0
3 years ago
What is the pressure of nitrogen in atmospheres of a sample that is at 745 mmHg?
Semenov [28]
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6 0
3 years ago
In the ground state, an atom of which element has two valence electrons?
Akimi4 [234]
I would say Ni so yeah thats ur answer


5 0
3 years ago
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