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nexus9112 [7]
3 years ago
13

And experiment a student measures the speed of a toy car locations K through N as it rolls down a ramp based on the data collect

ed in the table exclusion was shown by the student that the unbalanced forces acting on the toy car affect its average speed what reasoning lead to the interpretation of this data and conclusion
Chemistry
1 answer:
valentina_108 [34]3 years ago
4 0

Answer:

B) The average speed of the car increases as distance traveled increases.

Explanation:

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Conduction, Convection and Radiation

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Which element is identified by the chemical symbol C?
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B Carbon

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How dose heat travel between objects that are touching one another?
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If 24.6 grams of lithium react with excess water, how many liters of hydrogen gas can be produced at 301 Kelvin and 1.01 atmosph
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Answer: 43.3 l


Explanation:

1) Chemical equation:
2 Li(s) + 2 H₂O (l) → 2LiOH(aq) + H₂ (g)

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2 mol Li : 2 mol H₂O : 2 mol LiOH : 1 mol H₂

3) Number of moles of Li that react

n = mass in grams / atomic mass = 24.6g / 6.941 g/mol = 3.54 moles

4) Yield

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2 mol Li / 1 mol H₂ = 3.54 mol  Li/ x


⇒ x = 3.54 mol Li × 1 mol H / 2 mol Li = 1.77 mol H₂

4) Ideal gas equation

PV = nRT ⇒ V = nRT / P

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7 0
3 years ago
Which change will decrease the electric force between two positively charged objects? moving them closer together moving them fa
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Moving them farther apart

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One can try to change the distance between the two positive charges in such a way that it increases the distance and decreased the electric force.

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