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3 years ago

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A particular exosolar system has five planets in total: A, B, C, D, and E. The table lists the orbital periods of these planets

in days
PlanetOrbital Period (Days)
600
80
1,000
500
100
A
B
D
E
Move each planet to its orbit in the system.

1 answer:

sveta [45]3 years ago

8 0

Answer:

The answer is in the picture below

Explanation:

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Analyze A scientist tests the hardness of a mineral and finds that it can scratch

zhuklara [117]

Topaz and quartz

Explanation:

Topaz and quartz are minerals that will scratch feldspars but will not scratch corundum. Corundum is one of the hardest substance based on moh's scale.

The hardness of a mineral is its resistance to deformation. A mineral is harder than another if it can scratch it.

The moh's scale of hardness list minerals in the order of their hardness:

Talc
Gypsum
Calcite
Fluorite
Apatite
Orthoclase
Quartz
Topaz
Corundum
Diamond

Diamond is the hardest and talc is the softest.

Orthoclase is a feldspar.

learn more:

Rocks as mineral aggregates brainly.com/question/6568161

Silicate minerals brainly.com/question/4772323

#learnwithBrainly

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3 years ago

Part a cyclohexane has a freezing point of 6.50 ∘c and a kf of 20.0 ∘c/m. What is the freezing point of a solution made by disso

Andrei [34K]

The mathematical expression for the depression in freezing point is given as:

$\Delta T_{f}= k_{f}m$

where, $\Delta T_{f}$ = depression in freezing point

$k_{f}$ = molal depression constant (20.0 $^{o}Ckg/mole$ )

m = molality

Molality is defined as the ratio of number of moles of solute to the kg of the solvent

Number of moles = $\frac{given mass in g}{molar mass}$

given mass of biphenyl solute = 0.925 g

Molar mass of biphenyl = 154.21 g/mol

Put the values,

number of moles of biphenyl = $\frac{0.925 g}{154.21 g/mol}$

= $0.0059 mole$

Molality = $\frac{number of moles of biphenyl solute}{mass of the solvent in kg}$

Mass of cyclohexane solvent = 25.0 g

Convert g into kg: 1 kg = 1000 g

Thus, mass of cyclohexane = $\frac{25.0}{1000}$

= 0.025 kg

Now, put the values in the formula of molality:

Molality = $\frac{0.0059 mole}{0.025 kg}$

= 0.236 mole/kg or 0.236 m.

Calculate the depression in freezing point:

$\Delta T_{f}= 20.0^{o}C kg/mole\times 0.236 mole/kg$

= $4.72 ^{o}C$

Now, $\Delta T_{f} = T_{solvent} - T_{solution}$

$4.72 ^{o}C = 6.50^{o}C - T_{solution}$

$T_{solution} = 6.50^{o}C- 4.72 ^{o}C$

= $1.78^{o}C$

Hence, freezing point of the solution is $1.78^{o}C$ .

4 0

3 years ago

Read 2 more answers

Calculate the percentage of copper in copper oxide

WITCHER [35]

Well, look up the atomic weights of copper and oxygen; add them appropriately; divide the total for the copper by the total for the molecule; then multiply by 100 to get it as a percentage.

5 0

3 years ago

Which statement best describes nuclear binding energy

tia_tia [17]

When the protons and neutrons combine to form a nucleus, the mass that disappears

6 0

4 years ago

What do the atoms in solids do when melted into liquid? Would that cause an increase or decrease in density Explain your reasoni

artcher [175]

Hey there! I'll try to provide you with my best answer.

Answer: Atoms are the smallest particle of a chemical element that can exist. In the three states of matter, atoms in solids are tightly packed. And atoms in liquid are abit farther away from each other.

Basically what happens when they melt is that they gain a sort of heat energy. This heat energy comes from the fire or anything we are using to heat the solid material up. As we heat it, the tightly packed atoms vibrate. This vibration from even one single atom can cause other atoms to vibrate as well. As the vibration spreads and heat energy increasing if we constantly heat it, they obtain so much energy that at a point they start displacing from their position. This heat energy makes the atoms be in an excited state.They continiously hit each other and move farther away. They will keep on moving far until they stop gaining any heat energy. Eventually this slow process happens from solid to liquid. Just like how we see solid ice melt into water.

This cause an decrease in density. As in solids the atoms were very close to each other. But as soon as they are converting to liquid the atoms there has a gap between them. We can see this just like hold a solid object which doesn't move at all. But when water dropped at a place, this spreads wide out.

Hope it helps! And sorry for making it so long!

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3 years ago

Read 2 more answers