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2 years ago

A car traveled 150 meters in 5 seconds, what was its speed? 1.

Chemistry

2 answers:

Julli [10]2 years ago

8 0

1 .30
2.10
3.500
4.200

Vesnalui [34]2 years ago

4 0

Answer:

1. car traveled 30 meters per second

2. pepper traveled 10 meters per second

3. tony drove around 500 meters per minute

4. the bird traveled 200 miles

Hope this helped!

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Antoine put some metal into a container with air. He closed the container. He measured the weight of the closed container with t

Mandarinka [93]

Answer:

the same

Explanation:

due to the law of conservation of mass, the mass will not change

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3 years ago

Convert from 300 calories to calories (kicalories)? <br> Please help mee

Alex777 [14]

Answer:

0.3 kicalories

Explanation:

300/1000

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2 years ago

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Calculate the standard entropy of vaporization of ethanol, C2H5OH, at 285.0 K, given that the molar heat capacity at constant pr

MArishka [77]

Answer: The standard entropy of vaporization of ethanol is 0.275 J/K

Explanation:

$C_2H_5OH(l)\rightleftharpoons C_2H_5OH(g)$

Using Gibbs Helmholtz equation:

$\Delta G=\Delta H-T\Delta S$

For a phase change, the reaction remains in equilibrium, thus $\Delta G=0$

$\Delta H=T\Delta S$

Given: Temperature = 285.0 K

$\Delta H=78.3J/mol$

Putting the values in the equation:

$78.3J=285.0K\times \Delta S$

$\Delta S=0.275J/K$

Thus the standard entropy of vaporization of ethanol is 0.275 J/K

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3 years ago

When a substance is entering a phase change, the gain or loss of heat is a result of:______.

nydimaria [60]

When a substance is entering a phase change, the gain or loss of heat is a result of energy gained or lost in forming or breaking intermolecular interaction.

The constant temperatures occur when a substance is undergoing a phase transition. If heat is removed from a substance , such as in freezing and condensation , then the process is exothermic . In this instance , heat is decreasing the speed of the molecules causing then move slower.

Example : liquid to solid and gas to liquid .

These changes release heat to the surrounding.

To learn more about phase change,

brainly.com/question/12390797

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1 year ago

What does the cardiovascular system do<br> for the human body?

SashulF [63]

Answer: The blood circulatory system (cardiovascular system) delivers nutrients and oxygen to all cells in the body.

Explanation:

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2 years ago