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Feliz [49]
3 years ago
6

A balloon filled with helium occupies 21.0ft³ at 55.0°F. Find the temperature of the helium if the volume of the balloon decreas

es to 11.0ft³. (Assume that the pressure is held constant.)​
Chemistry
1 answer:
harkovskaia [24]3 years ago
6 0

Answer:

Assuming pressure is held constant,the question reduces to a ratio and proportion type of question where;

At constant pressure,

21.0ft³-55.0°F

11.0fy³=11.0ft³/21.0ft³×55°F

The temperature is 28.809°F≈29°F

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Anni [7]

Answer:

50000 dollars or 5 e5

Explanation:

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Scientific notation represents the data in the format of expanded number or with e character.

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3 0
3 years ago
The element californium (cf) sells for $1000 per µg. assuming 6.02 x 1023 atoms of cf have a mass of 251 grams, how many atoms o
saveliy_v [14]

Answer:- 2.40*10^1^0atoms

Solution:- It is a simple unit conversion problem. We could solve this using dimensional analysis.

We know that, 1 US dollar = 100 cents

1 cent  = 1 US penny

So, 1 US dollar = 100 US pennies

1g=10^6\mu g

Let's make the set up starting with 1 penny as:

1penny(\frac{$1}{100pennies})(\frac{1\mu g}{$1000})(\frac{1g}{10^6\mu g})(\frac{6.02*10^2^3atoms}{251g})

= 2.40*10^1^0atoms

Therefore, we can bye 2.40*10^1^0atoms of Cf in one US penny.

3 0
3 years ago
Express 250,000 mL in liters.<br> A) 0.25 L <br> B) 2,500 L <br> C) 25 L <br> D) 250 L
elena-s [515]
D) 250l
Explanation :
250,000/1000
5 0
3 years ago
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VladimirAG [237]
I’m pretty sure 8 as well because elctrouns can’t hold more than that
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The point at where the water is changing phase
e-lub [12.9K]

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