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3 years ago

A gas occupies 72.1 L at STP. At what temperature Kelvin would the gas occupy 85.9 L at a pressure of 93.6 kPa?

Chemistry

1 answer:

Natalija [7]3 years ago

4 0

Answer is 300K. I’ve included how I got that step by step in the photo below. Hope this helps!

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True [87]

Answer:

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3 0

2 years ago

a graduated cylinder has 35.0 mL of water in it before and object is dropped inside. The new volume is 38.5 mL. What is the volu

zlopas [31]

Displaced volume:

final volume - initial volume

1 mL = 1 cm³

38.5 mL - 35.0 mL = 3.5 cm³

hope this helps!

7 0

3 years ago

Whitney's tidal volume, which is the volume of air that she inhales and exhales, was 0.56 L . Her tidal volume was measured at a

ipn [44]

Given:

Volume of air inhaled V = 0.56 L

Temperature T = 37 C = 37 +273 = 310 K

Pressure P = 744 mmHg = 744/760 = 0.979 atm

% N2 in air = 78%

To determine:

The moles of N2 inhaled in one breath

Explanation:

Step 1: Calculate the moles of air inhales

Based on the ideal gas law:

PV = nRT

where P = pressure, T = temperature, V = volume, n = # moles

R = gas constant = 0.0821 L atm/mol-K

n = PV/RT = 0.979 * 0.56/0.0821*310 = 0.0215 moles of air

Step 2: Calculate the moles of N2

It is given that air contains 78% N2

Therefore:

moles of N2 = 0.0215 * 78/100 = 0.0168 moles

Ans: moles of N2 = 0.0168

6 0

4 years ago

3. Which part of Thomson's plum pudding model was different from Rutherford's model?

horsena [70]

Answer:

The difference between the Thompson's plum pudding model and the Rutherford atom model is the location of the electrons (option a).

Explanation:

While Thompson compared his atom to a plum pudding, where the electrons floated freely in the pudding, Rutherford established the arrangement of the electrons in orbitals, which were found around the atomic nucleus like the planets around the sun.

Rutherford's findings also established the existence of a small, positively charged nucleus.

Thompson and Rutherford models did not differentiate between the charges of electrons and protons , overall charges or overall size of the atom.

8 0

3 years ago

Which substance will evaporate first???????????????????

torisob [31]

Answer:

I think it would be a liquid.

Explanation:

If the temperature hits a certain point, it will turn to ice. If the ice gets exposed to heat, it will melt and return back to it's natural form, a lqiuid. If the liquid is exposed to enough heat, it will evaporate. Not sure if this is right, but I tried my best!

3 0

3 years ago