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2 years ago

2. A 10 kg ball is rolled down a rail from a height of 20 m. What is the velocity at the bottom of the

Chemistry

1 answer:

solmaris [256]2 years ago

3 0

Answer:

19.8m/s

Explanation:

Given parameters:

Mass of the ball = 10kg

Height of the rail = 20m

Unknown:

Velocity at the bottom of the rail = ?

Solution:

The velocity at the bottom of the rail is its final velocity.

Using the appropriate motion equation, we can find this parameter;

V² = U² + 2gH

V is the final velocity

U is the initial velocity

g is the acceleration due to gravity

H is the height

the ball was rolled from rest, U = 0

V² = O² + 2 x 9.8 x 20

V = 19.8m/s

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I have no clue how to even start this, any help is appreciated!

monitta

Answer:

Option D. Carbon monoxide, 4.56 Moles

Explanation:

The balanced equation for the reaction is given below:

Fe₂O₃ + 3CO —> 2Fe + 3CO₂

From the balanced equation above,

1 mole of Fe₂O₃ reacted with 3 moles of CO to produce 3 moles of CO₂.

1. Determination of the limiting reactant.

From the balanced equation above,

1 mole of Fe₂O₃ reacted with 3 moles of CO.

Therefore, 2.54 moles of Fe₂O₃ will react with = 2.54 × 3 = 7.62 moles of CO.

From the calculation made above, we can see that it will take higher amount of CO (i.e 7.62 moles) than what was given (i.e 4.56 moles) to react completely with 2.54 moles of Fe₂O₃. Therefore, CO is the limiting reactant and Fe₂O₃ is the excess reactant.

2. Determination of the maximum amount of carbon dioxide CO₂ produced.

In this case, the limiting reactant will be used since all of it is consumed by reaction.

The limiting reactant is CO and the maximum amount of CO₂ produced can be obtained as follow:

From the balanced equation above,

3 moles of CO reacted to produce 3 moles of CO₂.

Therefore, 4.56 moles of CO will also react to produce 4.56 moles of CO₂.

Thus, the maximum amount of CO₂ produced is 4.56 moles

Summary:

Limiting reactant => carbon monoxide, CO

Maximum amount of carbon dioxide, CO₂ produced = 4.56 moles

Thus, option D gives the correct answer to the question.

5 0

2 years ago

The distance north or south of the equator is called

Travka [436]

Answer:

Latitude

I hope this helps!

6 0

2 years ago

Consider two bulbs seperated by a valce. Both bulbs are amintained at the same temperature. Assume that when the valve between t

Juliette [100K]

Answer:

The pressure is $P_f = 0.93 \ atm$

Explanation:

From the question we are told that

The volume of Ne is $V_N = 2.50 \ L$

The volume of CO is $V_C = 2.00 \ L$

The pressure of $Ne$ is $P_N = 1.09 \ atm$

The pressure of CO is $P_C = 0.773 \ atm$

The number of moles of Ne present is evaluated using the ideal gas equation as

$n_N = \frac{P_N * V_N}{R T}$

=> $n_N = \frac{1.09 * 2.50 }{R T} = \frac{2.725}{RT}$

The number of moles of CO present is evaluated using the ideal gas equation as

$n_N = \frac{P_C * V_C}{R T}$

=> $n_N = \frac{0.73 * 2.00 }{R T} = \frac{1.46}{RT}$

The total number of moles of gas present is evaluated as

$n_T = n_N + n_C$

$n_T = \frac{2.725}{RT} + \frac{1.46}{RT}$

$n_T = \frac{4.185}{RT}$

The total volume of gas present when valve is opened is mathematically represented as

$V_T = V_N + V_C$

=> $V_T = 2.50 + 2.00 = 4.50 \ L$

From the ideal gas equation the final pressure inside the system is mathematically represented as

$P_f = \frac{n_T * RT }{ V_T}$

=> $P_f = \frac{[\frac{4.185}{RT} ] * RT }{ 4.50}$

=> $P_f = 0.93 \ atm$

3 0

2 years ago

What do electrons Do in ionic bond? Do they transfer from metals to no metals or nonmetal to metals?

9966 [12]

Answer:

electrons get transfered from metals to non metals in the formation of ionic bond.

metals have the tendency to lose electrons whereas non metals tend to stabilize by gaining electrons.

6 0

3 years ago

Which has a lower electronegativity: sodium or rubidium?

sammy [17]

Answer:

sodium has a lower electronegativity:)

Explanation:

6 0

2 years ago