Answer:
1. Density of the rectangular prism is <u>20 g/cm3</u>
2. A material's ability to dissolve : <u>Soubility</u>
3. <u>Intensive property</u> : A physical property that is independent of sample size.
Explanation:
Volume of Prism is calculated by :
Length = 3 cm
Width = 2 cm
Height = 1 cm
V = 6 cm3
mass = 120 g
Density = 20 g/cm3
2.
<u>Solubility :</u>
- It is the chemical property of the substance.
- It shows the ability of the solute to dissolve in the solvent at a given temperature.
3.
<u>Intensive Properties:</u>
- These are bulk properties(Do not depend upon the amount of matter present)
- They are independent of sample size.
- Example : boiling point,melting point,temperature,refractive index
People firstly believe that the planets move in a circular orbit until Newton came up with his hypothesis by inventing calculus so that we could understood and calculated planetary orbits and their accuracy.
<u>Explanation:</u>
- Everyone assumed the planets were perfect circles until Newton came up with an idea. Slowly people would make maps of the orbits that added circles on circles, and they could never really explain about the movement of the planet. They simply say that planets move on circles but they lacked the math to explain or prove it. Then Newton came up with an idea of inventing calculus so that we could understood and calculated planetary orbits and their accuracy.
- Firstly people used their observations and say that the orbits looked like circles, then they developed their models and did the math, and proposed their hypothesizes which were wrong, until Newton came along and tried to match a model that used elliptical orbits and invented the math that allowed him to make predictions with it. His model worked for most planets.
- However he could not explain about the planet Mercury for instance since it was a very strange orbit. Then after the Einstein's theory of General Relativity he could also explain very deeply about it.
- Scientists and Astronomers made hypothesizes that there was another planet orbiting too close to the sun to see with telescopes, called Vulcan, that explained mercury's orbit before Einstein's theory. Then long after we had telescopes which was good enough to see if there was a planet orbiting closer to the sun than mercury.
Answer : The final concentration of copper(II) ion is, 0.198 M
Explanation :
First we have to calculate the moles of and .
Moles of = Moles of = 0.00459 mol
and,
Moles of = Moles of = 0.00869 mol
Now we have to calculate the total moles of copper(II) ion and total volume of solution.
Total moles copper(II) ion = 0.00459 mol + 0.00869 mol
Total moles copper(II) ion = 0.0133 mol
and,
Total volume of solution = 40.6 mL + 26.4 mL = 64.0 mL = 0.067 L (1 L = 1000 mL)
Now we have to calculate the final concentration of copper(II) ion.
Thus, the final concentration of copper(II) ion is, 0.198 M
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