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21.05.2021 •
Chemistry
Which temperature would be most appropriate on a hot summer day: 0 Degrees Celsius, 35 Degrees Celsius, or 90 Degrees Celsius?
Which temperature would be most appropriate as a room temperature: -20 Degrees Celsius, 0 Degrees Celsius, or 20 Degrees Celsius?
A block of aluminum has a volume of 15mL and a mass of 45g. In this example what is aluminum's density?
A rectangular block of gold has a mass of 80g. The dimensions of the block are 2cm by 5cm by 4cm. From this information, calculate the density.
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Ответ:
1. For a hot summer day, 35 degrees Celsius is most appropriate.
2. For room temperature, 20 degrees Celsius is most appropriate.
3. Aluminum's density is found by dividing mass by volume. 45 / 15 = 3 g/mL. The density is 3 g/mL.
4. Volume is found by multiplying length x width x height. 2cm x 5cm x 4cm equals 40 cm. We then divide the mass by volume to find density. 80 / 40 = 2 g/cm³. The density is 2 g/cm³.
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