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PSYCHO15rus [73]

3 years ago

12

When a 1 kg ball is dropped from the roof of a building its speed increases from 0 m/s to 10 m/s just before it hits the ground.

What is the ball's change in Kinetic Energy at its maximum (fastest) speed?

2 answers:

Aleksandr [31]3 years ago

6 0

30 kinetic energy is the answer.

makkiz [27]3 years ago

6 0

30m/s It is at its maximum speed

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Which of the following is NOT a way that thermal energy is transferred?

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Your answer would be D.) Convection. I hope this helps you! :)

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A gas has a pressure of 8.5atm and occupies 24L at 25∘C. What volume (in liters) will the gas occupy if the pressure is increase

Vesna [10]

The volume (in liters) that the gas will occupy if the pressure is increased to 13.5 atm and the temperature is decreased to 15 °C is 15 L

From the question given above, the following data were obtained:

Initial pressure (P₁) = 8.5 atm

Initial volume (V₁) = 24 L

Initial temperature (T₁) = 25 °C = 25 + 273 = 298 K

Final pressure (P₂) = 13.5 atm

Final temperature (T₂) = 15 °C = 15 + 273 = 288 K

<h3>Final volume (V₂) =? </h3>

The final volume of the gas can be obtained by using the combined gas equation as illustrated below:

$\frac{P_{1}V_{1}}{T_{1}} = \frac{P_{2}V_{2}}{T_{2}}\\\\\frac{8.5 * 24}{298} = \frac{13.5 * V_{2}}{288}\\\\ \frac{204}{298} = \frac{13.5 * V_{2}}{288}\\\\$

Cross multiply

298 × 13.5 × V₂ = 204 × 288

4023 × V₂ = 58752

Divide both side by 4023

$V_{2} = \frac{58752}{4023}\\\\$

<h3>V₂ = 15 L </h3>

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Learn more: brainly.com/question/25547148

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2 years ago

_ S8 +_02 +_ SO3

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My educated guess should be the 3rd one

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What mass of ammonia can be produced if 13.4 grams of nitrogen gas reacted ?

aivan3 [116]

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If 13.4 grams of nitrogen gas reacts we'll produce 16.3 grams of ammonia

Explanation:

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Mass of nitrogen gas (N2) = 13.4 grams

Molar mass of N2 = 28 g/mol

Molar mass of NH3 = 17.03 g/mol

Step 2: The balanced equation

N2 + 3H2 → 2NH3

Step 3: Calculate moles of N2

Moles N2 = Mass N2 / molar mass N2

Moles N2 = 13.4 grams / 28.00 g/mol

Moles N2 = 0.479 moles

Step 4: Calculate moles of NH3

For 1 mol N2 we need 3 moles H2 to produce 2 moles NH3

For 0.479 moles N2 we'll produce 2*0.479 = 0.958 moles

Step 5: Calculate mass of NH3

Mass of NH3 = moles NH3 * molar mass NH3

Mass NH3 = 0.958 moles * 17.03 g/mol

Mass NH3 = 16.3 grams

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