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kipiarov [429]
3 years ago
11

A chemist weighed out 101. g of potassium. Calculate the number of moles of potassium she weighed out.

Mathematics
2 answers:
ehidna [41]3 years ago
6 0
 The answer is 2.58 moles potassium<span>
The solution to this is,
to find moles, convert grams to mole by the equation
grams(mole/gram)=moles
101. g of potassium(1 mole potassium/</span><span>39.10 g potassium)=2.58 moles potassium</span>
Bumek [7]3 years ago
5 0

Answer:

101 g of Potassium is equivalent to 2.583 moles of Potassium.

Step-by-step explanation:

As per definition of moles, molecular weight of a substance = 1 mole

So molecular weight of Potassium = 39.0983 g

∵ 39.0983 g weight of Potassium = 1 mole

∴ 1 g weight of Potassium = \frac{1}{39.0983} g

∴ 101 g of Potassium = \frac{101}{39.0983} g

                                  = 2.583 moles

Therefore, 101 g of Potassium is equivalent to 2.583 moles of Potassium.

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saveliy_v [14]

Answer:

Y=5

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6 0
3 years ago
A ball is thrown with an initial velocity of 70 km per second, at an angle  of 35° with the horizontal. Find the vertical and ho
oksian1 [2.3K]

Answer:

i. The horizontal component of the ball = 15.8

ii. The vertical component of the ball = 11.2

Step-by-step explanation:

A thrown ball is an example of a projectile, whose motion can be explained with respect to both horizontal and vertical components.

Horizontal component of the ball = U Cos θ

Vertical component of the ball = U Sin θ

where U is the initial velocity of the ball, and θ is the angle of projection.

Thus for the given question,

U = 70 km/hr (19.44 m/s)

θ = 35°

So that;

i. The horizontal component of the ball = 19.44 Cos 35°

                                               = 19.44 x 0.8192

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The horizontal component of the ball = 15.8.

ii. The vertical component of the ball = 19.44 Sin 35°

                                                = 19.44 x 0.5736

                                                = 11.151

The vertical component of the ball = 11.2

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3 years ago
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Step-by-step explanation:

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KiRa [710]

Answer:

(i) 520

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Step-by-step explanation:

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