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hjlf
4 years ago
15

Inferences are A. never made by scientists. B. questions that are made by studying conclusions or predictions. C. exactly the sa

me as observations. D. conclusions or predictions that are made by studying observations.
Chemistry
1 answer:
bekas [8.4K]4 years ago
7 0

The Answer Is D. Have A Great Day

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A gas system has volume, moles and temperature of 9040 mL, 0.447 moles and -35.50 oC, respectively. What is the pressure in atm?
babymother [125]

Answer : The pressure of the gas is, 0.964 atm

Solution : Given,

Volume of gas = 9040 ml = 9.040 L        (1 L = 1000 ml)

Moles of gas = 0.447 moles

Temperature of gas = -35.50^oC=237.5K       (0^oC=273K)

Using ideal gas equation,

PV=nRT

where,

P = pressure of the gas

V = volume of the gas

T = temperature of the gas

n = number of moles of gas

R = gas constant = 0.0821Latm/moleK

Now put all the given values in this formula, we get the pressure of the gas.

P(9.040L)=(0.447moles)\times (0.0821Latm/moleK)\times (237.5K)

By rearranging the terms, we get

P=0.964atm

Therefore, the pressure of the gas is, 0.964 atm

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Strong bases are
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D strong electrolytes

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4 years ago
How does the hard corals make their skeleton from seawater?
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Answer:

Small marine animals produce a very hard skeleton made of calcium carbonate, which they extract from the seawater and combine CO2 for limestone.

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Write a balanced chemical equation for the standard formation reaction of solid lead(II) nitrate PbNO32.
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Pb(s) + N2(g) + 3O2(g) --> Pb(NO3)2

Explanation:

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The difference I think is the fact one has DNA and the other doesn't.
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