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4 years ago

1) It takes a balanced force to accelerate an object

1 answer:

7 0

1) False, an unbalanced force is needed or the object will stay in place.
2) True, weight is the amount of force gravity is putting on an object.
4) True, net force is equal to the mass of the object multiplied by the acceleration of an object.
5) False, however I'm not completely sure on this one.
6) Force is any interaction that will change the motion of an object.
7) vertical
8) horizontal
9) horizontal.
10) vertical or both.

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A sample of propane (C3H8) has a mass of 0. 47 g. The sample is burned in a bomb calorimeter that has a mass of 1. 350 kg and a

Nady [450]

The amount of heat released by the sample has been 22.54 kJ. Thus, option C is correct.

The specific heat has been defined as the amount of heat required to raise the temperature of 1 gram of substance by 1 degree Celsius.

The specific heat has been expressed as:

$q=mc\Delta T$

<h3 /><h3>Computation for the heat absorbed</h3>

The iron and calorimeter are in side the closed system. Thus, the energy released by the sample, has been equivalent to the energy absorbed by the calorimeter.

$q_{released}=q_{absorbed}\\
q_{released}=m_{calorimeter}\;c_{calorimeter}\;\Delta T$

The given mass of calorimeter has been, $m_{calorimeter}=1350\;\rm g$

The specific heat of the calorimeter has been, $c_{calorimeter}=5.82\;\rm J/g^\circ C$

The change in temperature of the calorimeter has been, $\Delta T=2.87^\circ \rm C$

Substituting the values for heat released:

$q_{released}= 1350\;\text g\;\times\;5.82\;\text J/\text g^\circ \text C\;\times\;2.87^\circ \text C\\
q_{released}=22,549.5\;\text J\\
q_{released}}=22.54\;\rm kJ$

The amount of heat released by the sample has been 22.54 kJ. Thus, option C is correct.

Learn more about specific heat, here:

brainly.com/question/2094845

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3 years ago

13. In the wintertime, there is<br> food <br> sunlight (energy), so producers are making

kumpel [21]

Answer: shelter

Explanation:

Producers make food for the rest of the ecosystem through the process of photosynthesis, where the energy of the sun is used to convert carbon dioxide and water into glucose.

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3 years ago

What mass of KCL is contained in .350 M solution of KCL?

Sergio039 [100]

The mass of KCl per volume of solution=.35X(35.5+39)=26.075g/L

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4 years ago

Why is it important to make sure that the endpoint is noted accurately in titration?

andrezito [222]

There should be no air bubbles, as a bubble bursting can affect the volume measurement and disrupt the accuracy of the experiment.

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3 years ago

Given the balanced equation representing a

fredd [130]

From the coefficients of the equation, we see that for every 4 moles of aluminum consumed, 3 moles of oxygen are consumed.

So, the answer is (12/4)(3) = 9 moles.

5 0

2 years ago