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Margaret [11]
2 years ago
15

4. A substance has a density of 0.79 g/cm'. It is soluble in water. List all the possibilities of what it might be How could you

determine the actual identity?​
Physics
1 answer:
Natasha_Volkova [10]2 years ago
5 0

Answer:

See explanation

Explanation:

Given that the density of the unknown substance is 0.79 g/cm3 and is soluble in water, the possible substances it could be are;

i) t-butanol

ii) ethanol

iii) 2-propanol

iv) acetone

However, the actual identity of the unknown substance can be obtained by carrying out a boiling point test. The four substances listed above have different boiling points. Hence the boiling point of the unknown substance ultimately discloses its identity.

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You throw a ball upward with a speed of 14m/s. What is the acceleration of the ball after it leaves your hand? Ignore air resist
omeli [17]

The acceleration of the ball after leaving the hand is 9.8 m/s^2 downward

Explanation:

In order to find the acceleration of the ball during its motion, we have to study which forces are acting on it.

After the ball leaves the hand, if we neglect air resistance, there is only one force acting on the ball: the force of gravity, whose magnitude is

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According to Newton's second law, the acceleration of the ball is given by

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After the ball leaves the hand, the only force acting on it is the force of gravity, so we can substitute (mg) into the previous equation:

a=\frac{mg}{m}=g=9.8 m/s^2

This means that the acceleration of the ball remains 9.8 m/s^2 downward for the entire motion, after leaving the hand.

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brainly.com/question/3820012

#LearnwithBrainly

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3 years ago
a scientist is studying the effects of sunlight on rose bushes. which statement is a hypothesis that he can test be preforming a
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Explanation:

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Care este pozitia unui mobil cand t(s)=14 si x(m)=12?​
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Name of compounds<br>a. H2Co3<br>b. NH4OH<br>c.AlPO4<br>d.NaOH<br>e.AuCI3<br>​
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Answer:

<em><u>a) </u></em><em><u> </u></em><em><u>Carbonic acid</u></em>

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<em><u>c</u></em><em><u>)</u></em><em><u> </u></em><em><u>Aluminum phosphate</u></em>

<em><u>d</u></em><em><u>)</u></em><em><u> </u></em><em><u>Sodium hydroxide</u></em>

<em><u>e</u></em><em><u>)</u></em><em><u> </u></em><em><u>Gold trichloride</u></em>

Explanation:

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