Pretest P1 Pharmacy Physics

The mass per unit volume of a substance at a certain temperature and pressure is called

• Specific gravity

• Density

• Molecular weight

• Pressure

Calculate the density of 25 ml of acetone if it has a mass 8,23 grams

• 0,3292 gram/ml

• 3,292 grams/ml

• 32,92 grams/ml

• 3292 grams/ml

The following things that can not affect the density is

• Mass

• Volume

• Temperature and pressure

• Surface Area

The following tools can be used to measure the density of a substance

1) Pycnometer

2) Thermometer

3) Hydrometer

4) Viscometer

5) Densitometer

Choose the right answer

• 1,2,3

• 2,3,5

• 1,3,5

• 2,4,5

Bobot jenis suatu benda akan memiliki nilai yang kecil ketika

• Kerapatan suatu zat lebih besar daripada kerapatan air

• Kerapatan suatu zat lebih kecil daripada kerapatan air

• Volume suatu zat lebih besar daripada volume air

• Volume suatu zat lebih kecil daripada volume air

Penentuan bobot jenis nyata umumnya menggunakan

• Aquadest

• Etanol

• Kloroform

• Air Raksa

Which of the following statements about true density and apparent density are true:

• The true density will be numerically less than the true density

• The apparent density is numerically equal to the true density

• The apparent density will be numerically greater than the true density

• The true density will be numerically greater than the apparent density

According to the metric system, the value of the density of water at 4o C is

• 1 gram/cc

• 10 grams/cc

• 0,1 gram/ cc

• 100 gram/ cc

Calculate the volume if the density is 0.525 grams/ml and the mass of the sample is 4.526 grams

• 8.6209 ml

• 86,209 ml

• 8,5109 ml

• 85.109 ml

The ratio of the density of a substance to the density of water at the same temperature is called

• Specific gravity

• Density

• Molecular weight

• Pressure