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Milan is measuring the density of ethanol. He weighs a

Berikut ini adalah pertanyaan dari maliksalahuddin2000 pada mata pelajaran Fisika untuk jenjang Sekolah Menengah Pertama

Milan is measuring the density of ethanol. He weighs a bottle three times:first, empty; then filled with water; then filled with ethanol. Here are his results:mass of empty bottle = 30.0g
mass of bottle filled with water = 90.0g
mass of bottle filled with ethanol = 78.0g
1. Calculate the volume of the bottle.
2. Calculate the mass of the ethanol.
3. Calculate the density of the ethanol.

Jawaban dan Penjelasan

Berikut ini adalah pilihan jawaban terbaik dari pertanyaan diatas.

Answer:

1. 60ml. (The bottle can only be filled with 60ml of liquid)

2. 48g

3. 0.8 g/ml

Explanation:

(!) What we know:

mass of empty bottle = 30.0g

mass of bottle filled with water = 90.0g

mass of bottle filled with ethanol = 78.0g

Assume that the temperature is 25°C.

That means the density of water is 1g/ml (1ml = 1g)

• Mass of bottle filled with water - mass of empty bottle= 60g.

Water's density= 1 g/ml

Density (rho) = mass (m)/Volume (V)

density (\rho) = \frac{mass(m)}{volume(v)}

1 = \frac{60 \: g}{x \: ml}

x \: ml= \frac{60 \: g}{1}

Volume (water)= 60ml

This means the bottle filled with 60ml of water. The bottle can only be filled with 60mlof liquidmax.

NB: You could use x or V on that equation but preferably V. (The app's equation function cannot use uppercase letter like ABC...)

• Mass of bottle filled with ethanol - mass of empty bottle= 78-30= 48g. 48g is the mass of 60ml ethanol.

Ethanol's density= 48g/60ml

Ethanol's density= 0.8 g/ml

Hope this is correct and useful for you.

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Last Update: Tue, 17 Jan 23
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