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Elena L [17]
3 years ago
9

Describe and explain one real-life and/or recent example of how scientific knowledge had to change or adapt in the face of new d

iscoveries.
OR
Describe and explain one old (i.e. not accepted anymore...) scientific model or theory. Then, explain why or how that old model had to change.
Chemistry
1 answer:
AfilCa [17]3 years ago
4 0

Answer: Science is a particular way of knowing about the world. In science, explanations are restricted to those that can be inferred from confirmable data—the results obtained through observations and experiments that can be substantiated by other scientists. Anything that can be observed or measured is amenable to scientific investigation. Explanations that cannot be based on empirical evidence are not a part of science.

Explanation:

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A motorist discovers that her auto tire measures 29.2 psi rather than the recommended 35 psi. If the tire’s volume is assumed co
I am Lyosha [343]

Answer:

  0.20 moles

Explanation:

The pressure is proportional to the quantity of gas at a given temperature and volume. So, the quantity needs to be increased by a factor of ...

  (35 psi)/(29.2 psi) = 175/146 ≈ 1.19863

The fractional increase required is ...

  1.19863 -1 = 0.19863

__

The quantity of air currently in the tire is ...

  1 mol·519.67°R/(atm·23.6442 L) × (29.2/14.7 atm) × (11.6 L) / (45+459.67)°R

  = 1.0035 mol

so we need to add ...

  (fraction to add) × (current quantity) = amount to add

  0.19863 × 1.0035 mol = 0.1993 mol = amount to add

About 0.20 moles of air must be added to the tire to bring the pressure up.

5 0
3 years ago
Sea level changes occur at a rate of 10 m per 1,000 years. How much will the sea level change over 10,000,000 years?
GREYUIT [131]

Answer:

100,000 m

Explanation:

5 0
4 years ago
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How long does it take to create one artifcial leaf?
puteri [66]
Google said one week
3 0
3 years ago
What is the molarity of a solution that contains 20.45 g of sodium chloride (NaCl) dissolved in 700.0 mL of solution?
Nostrana [21]
Molarity is the number of moles of solute in 1 L of solution.
the mass of NaCl added - 20.45 g
number of moles of NaCl - 20.45 g / 58.5 g/mol = 0.350 mol
volume of the solution is 700.0 mL 
since molarity is the number of moles in 1000 mL 
and if 700.0 mL contains - 0.350 mol 
therefore 1000 mL contains - 0.350 mol / 700.0 x 1000 = 0.500 mol 
hence molarity of solution is 0.500 M
6 0
3 years ago
3. The Kp for the reaction below is 1.49 × 108 at 100.0 °C:CO (g) + Cl2 (g) → COCl2 (g)In an equilibrium mixture of the three ga
PSYCHO15rus [73]

Answer:

In an equilibrium mixture of the three gases, PCO = PCl2 = 2.22 × 10-4 atm. The partial pressure of the product, phosgene (COCl2), is kp=(COCl2)/(CO)(Cl2) which is . So, the correct answer is 7.34.

8 0
3 years ago
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