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11Alexandr11 [23.1K]
2 years ago
7

Number 8 question need help

Chemistry
1 answer:
EastWind [94]2 years ago
8 0

Answer:

where is the question

Explanation:

pls. send it

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An ideal gas in a 1.25-gallon container is at a temperature of 125 degrees Celsius and pressure of 2.5 atmospheres. If the gas i
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You will need the equation PV = nRT

P = Pressure in kPa
V = Volume in L
n = moles
R = 8.314 (constant)
T = Temperature in Kelvin 

First convert 2.5 atm into kPa:

2.5 X 101.3 = 253.25 kPa

Convert 125 Celsius into Kelvin:

125 + 273 = 398 K

Convert Gallons to Litres:

1.25  X 3.79 = 4.74 L

Plug your values into the equation to solve for n:

(253.25)(4.74) = n(8.314)(398)

n = (253.25)(4.74)/(8.314)(398)

n = 0.362 moles

Now use M = m/n to solve for the mass of O2

M = Molar Mass 
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n= moles

32 = m/(0.362)

m = (32)(0.362) 

m = 11.58g
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3 years ago
A student mixes a 10.0 ml sample of 1.0 m naoh(aq) with a 10.0 ml sample of 1.0 m hcl(aq) in a polystyrene container. the temper
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Hrxn = Q reaction / mol of reaction
mol of reaction = M * V = 10 * 1 = 10 mmol = 0.01 mol
Q water = m * C * (Tf - Ti)
             = (10 + 10) (4.184) (26-20) = 502.08 J
Q reaction = - Q water = -502.08 J
Hrxn = -502.08 / (0.01) = - 50208 J = - 50.21 kJ/mol
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Which scientist discovered the neutron and gave us the current basic model of
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Answer:

c

Explanation:

i read a artical on him and it said

love yall;]

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Which general equation shows a Single-displacement reaction?
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Hello! The answer is D

A good note for these is when there are three elements, one being a singular element and another a compound and there’s a single switch, this could show a single-displacement

Have a good day gamer.
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suffixes Refer to the word parts table that you made for the words in Section 2 containing the suffix -ic. Use each of the words
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Explanation:

need an image

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