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dolphi86 [110]
3 years ago
13

5. How do scientists analyze the TRAPPIST system? Write two key ideas. Work with a partner.

Chemistry
1 answer:
pentagon [3]3 years ago
5 0

Answer:

They start with the planet furthest from us then go down the line of how many miles from us it is. Mars and Venus are the closests to us.

Explanation:

Its showing miles away it is and how fast it rotates and scientists study and analyze that.

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What pressure will be exerted by 25 g of CO2 at temperature of 25°C and a volume of .50 L?
Grace [21]

Answer:

P = 27.9 atm

Explanation:

Given data:

Mass of CO₂ = 25 g

Temperature = 25°C (25+273.15 K = 298.15 K)

Volume of gas = 0.50 L

Pressure of gas = ?

Solution:

Firs of all we will calculate the number of moles of gas,

Number of moles = mass/molar mass

Number of moles = 25 g/ 44 g/mol

Number of moles = 0.57 mol

Pressure of gas :

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

P × 0.50 L = 0.57 mol × 0.0821 atm.L/ mol.K  × 298.15 K

P = 13.95 atm.L/ 0.50 L

P = 27.9 atm

4 0
3 years ago
Which statement best describes a physical change?
Pepsi [2]

Answer:

The answer is c

7 0
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Colder air tends to have _____.
iogann1982 [59]

Answer:

I believe the answer is D

Explanation:

C is not correct

8 0
3 years ago
Compare the boiling points of 1-pentyne and 1-octyne.
Elan Coil [88]
1-pentyne consists of a carbon chain of 5 carbons one with a triple bond. 1-octyne is a carbon chain of 8 carbons with a triple bond at some point. It is known that the longer the carbon chain the higher the boiling point since more energy will be required to break the bonds between carbons. Based on this it is predicted that 1-octyne will have a higher boiling point than 1-pentyne.
8 0
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Gases are easily compressible

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