Calculate the mass of a sample of gold that occupies 0.91 cm3. The density of gold is 19.3 g/cm3?
回答 (4)
2016-09-13 4:43 pm
Mass of gold
= (Density of gold) × (Volume of gold)
= (19.3 g/cm³) × (0.91 cm³)
= 18 g (to 2 sig. fig.)
* 0.91 is to 2 sig. fig., while 19.3 is to 3 sig.fig.
* The answer is to the smallest sig. fig., i.e. 2 sig. fig.
= (Density of gold) × (Volume of gold)
= (19.3 g/cm³) × (0.91 cm³)
= 18 g (to 2 sig. fig.)
* 0.91 is to 2 sig. fig., while 19.3 is to 3 sig.fig.
* The answer is to the smallest sig. fig., i.e. 2 sig. fig.
2016-09-13 4:43 pm
17.563 grams because 19.3 x .91 =17.563
2016-09-22 7:12 pm
density d = mass / volume .
so mass = density x volume , so the mass of the gold is : 19.3 g / cc x 0. 91 cc = 17.563 grams
so mass = density x volume , so the mass of the gold is : 19.3 g / cc x 0. 91 cc = 17.563 grams
2016-09-13 4:35 pm
goldsmith would know
收錄日期: 2021-04-18 15:33:24
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