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3 years ago

Why does an object in motion stay in motion unless acted on by an unbalanced force?

Chemistry

2 answers:

otez555 [7]3 years ago

6 0

its A on USA TEST PREP, because forces are what start and stop motion

Virty [35]3 years ago

5 0

because newtons third law states Pushing something like a swing set makes the motion begin, but if you stop that swing the motion stops.

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If 1.85 g of Mg(OH)2 reacts with 3.71 g of HCl,

Damm [24]

Both of them are a hope this helps

8 0

3 years ago

Rachel burns a 53 gram cracker under a soda can filled with 81.6 grams of water. She took the temperature of the water before sh

Anna11 [10]

Answer

Q=4479.8 cal

Procedure

To solve the problem you will need to use the specific heat formula

$Q=mc\Delta T$

Where;

Q=heat energy

m=mass

c=specific heat capacity

ΔT=change in temperature

Assuming that the heat released from the cracker of unknown material is equal to the heat absorbed by the water, then we can use the c and m for water in our calculations.

$c_{water}=4.186\frac{J}{g\degree C}$

Substituting the values in our equation we have

$Q=mc\Delta T=81.6\text{ }g(4.186\frac{J}{g\degree C})(68.1-13.2)\degree C=18752.61\text{ }J$

Finally, transform the J to cal

$18752.61\text{ }J\frac{1\text{ }cal}{4.186\text{ }J}=4479.8\text{ cal}$

8 0

1 year ago

A sample of hydrogen gas is collected over water at 25°C. The vapor pressure of water at 25°C is 23.8 mmHg. If the total pressur

Illusion [34]

The partial pressure of the gas will be the total pressure minus the vapor pressure. 523.8-23.8=500mmHg. This makes sense due to the fact that the idea of partial pressures still works even with vapor pressure since vapor pressure is just the partial pressure of water vapor (23.8mmHg) in the container which is added to the partial pressure of hydrogen gas (500mmHg) to make a total pressure of 523.8mmHg.
I hope this helps. Let me know in the comments if anything is unclear.

4 0

3 years ago

True or False: A flame test can be used to identify the presence of certain elements in a compound?

Anna11 [10]

Your answer to this question would be True.

Hope I helped:P

3 0

3 years ago

_____________ is the energy stored because of its position or shape.

Natasha2012 [34]

Answer:

Potential Energy is the energy stored because of its position or shape

Explanation:

8 0

3 years ago