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Dennis_Churaev [7]
2 years ago
10

How does an object in motion stay in motion unless acted upon by an unbalanced force

Chemistry
1 answer:
jek_recluse [69]2 years ago
7 0

An object in motion will remain in motion at a constant speed and in the same direction unless acted on by an unbalanced force. An object at rest will remain at rest unless acted upon by an unbalanced force. The acceleration of an object depends on the mass of the object and the amount of force applied to it.

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You know that breaking up the tablet increases the surface area of the seltzer. So what could you conclude about the relationshi
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A student is instructed to make 1 L of a 2.0 M solution of CaCl2 using dry salt. How should he do this?
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<span>The student should follow following steps to make 1 L of </span>2.0 M CaCl₂.<span>
<span>
1. First he should calculate the number of moles of 2.0 M CaCl</span></span>₂ in 1 L solution.<span>

</span>Molarity of the solution = 2.0 M<span>
Volume of solution which should be prepared = 1 L

Molarity = number of moles / volume of the solution

Hence, number of moles in 1 L = 2 mol

2. Find out the mass of dry CaCl</span>₂ in 2 moles.<span>

moles = mass / molar mass

Moles of CaCl₂ = 2 mol</span><span>
Molar mass of CaCl₂ = </span><span>110.98 g/mol

Hence, mass of CaCl</span>₂ = 2 mol x <span>110.98 g/mol
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3. Weigh the mass accurately 

4. Then take a cleaned and dry1 L volumetric flask and place a funnel top of it. Then carefully add the salt into the volumetric flask and finally wash the funnel and watch glass with de-ionized water. That water also should be added into the volumetric flask.

5. Then add some de-ionized water into the volumetric flask and swirl well until all salt are dissolved.

<span>6. Then top up to mark of the volumetric flask carefully. 
</span>
</span>
7. As the final step prepared solution should be labelled.
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