1) The unknown substance has a volume of 7.5 cm³
2) The mineral sinks in the water
3) The mineral floats in the water
4) It has a mass of 800 g
5) It has a density of 2.7 g/cm³
6) Iron has a calculated density of 7.9 g/mL
7) Calculated density of the rock is obtained as 3 g/mL
8) Ethyl alcohol has a mass of 7.9 g
<h3>What is density?</h3>
The term density has to do with the mass per unit volume of the object. The density is an intrinsic property as such the density of the object is one of the factors that we could use in the identification of the body.
1) The volume of the unknown substance could be obtained from;
V = mass/density = 47g/ 6.8g/cm³ = 7.5 cm³
2) A mineral that has a density of 2.5g/cm³ would sink in the water
3) A mineral that has a density of 0.45g/cm³ would float in the water
4) The mass of the substance is obtained from;
mass = density * volume = 10g/mL * 80mL = 800 g
5) The density of the rock is 54g./20cm³ = 2.7 g/cm³
6) Density of the iron = 28.5g/ 49.1mL - 45.5mL = 7.9 g/mL
7) Density of the rock = 24g/30mL - 22mL = 3 g/mL
8) The mass of the ethyl alcohol is 0.789g/mL * 200 ml = 7.9 g
Learn more about density:brainly.com/question/15164682
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