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solniwko [45]
3 years ago
11

If the density of water is 1.0 g/cm3, which of these materials would float in water, based on their densities? Check all that ap

ply. Aluminum cork iron lead wax
Chemistry
2 answers:
Darina [25.2K]3 years ago
5 0

Answer: cork and wax

Explanation: Density is defined as the mass of substance contained per unit volume.

A substance which has higher density than water will sink in water and the one which has lower density than water will float in water.

Given: density of water = 1.0 g/cm^3

As we know:  density of aluminium = 2.70 g/cm^3

density of cork = 0.24 g/cm^3

density of iron= 7.87 g/cm^3

density of lead= 11.34 g/cm^3

density of wax = 0.9 g/cm^3

Thus as density of cork and wax is lower as compared to water, both cork and wax will float in water.

Anuta_ua [19.1K]3 years ago
3 0

Answer:

Cork and Wax

Explanation:

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The following data was collected when a reaction was performed experimentally in the laboratory.
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Answer:

The answer to your question is 3 moles of AlCl₃

Explanation:

Process

1.- Write and balance the equation

                  Al(NO₃)₃ + 3NaCl   ⇒   3NaNO₃  +  AlCl₃

2.- Determine the limiting reactant

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Experimental proportion   4 moles Al(NO₃)₃ : 9 moles NaCl

From these values, we determine that the limiting reactant is NaCl because the number of moles increases three times and the number of moles of Al(NO₃)₃  increases four times.

3.- Determine the amount of AlCl₃ using proportions

                       3 moles of NaCl --------------- 1 mol of AlCl₃

                       9 moles of NaCl ----------------  x

                       x = (9 x 1) / 3

                       x = 9 /3

                       x = 3 moles

                     

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3 years ago
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Picture of gas laws question below:
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Volume of the tank is 5.5 litres.

Explanation:

mass of the CO2 is given 8.6 grams

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R = gas constant 0.0821 liter atmosphere per kelvin)

FROM THE IDEAL GAS LAW

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