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myrzilka [38]
1 year ago
13

Unit: Moles and molar massI need help on this problem!

Chemistry
1 answer:
ella [17]1 year ago
8 0

We are asked how many times would 1 mole of twinkies travel to pluto and back.

We are given that:

1 twinkie = 9.4 cm

Distance from sun to pluto = 5,900,000,000 km

We know that:

1 km = 100000 cm

1 mole = 6.02x10^23 atoms

therefore 1 twinkie = 9.4 cm = 9.4x10^-5 km

If 1 twinkle is 9.4x10^-5 km long and travels 5,900,000,000 km

You multiply the distance of twinkle by the distance from sun to pluto.

So:

9.4x10^-5 km x 6.02x10^23 x 5,900,000,000 = 3.339x10^29 times.

So 1 twinkle will travel 554600 times from the sun to pluto. Times this amount by 2 to get how many times it will travel to pluto and back.

3.339x10^29 x 2 = 6.677x10^29 times

Therefore 1 mole of twinkies will travel to pluto and back 6.677x10^29 times

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Anna007 [38]
Water displacement is a particular case of fluid displacement, which is simply the principle that any object placed in a fluid causes that fluid to no longer occupy that volume of space. The fluid must go somewhere, however, and so with liquids in containers this causes their overall height to rise.
8 0
3 years ago
What is the shortest day of the year known as? A.vernal B.equinox C.winter D.solstice summer solstice E.autumnal equinox
Olegator [25]

Answer:

summer solstice

Explanation:

on june solstice the northen hemisphere leans more toward the sun giving us longer days and more strong sunlight and It's the opposite in the Southern Hemisphere where june marks the start of winter thus its the shortest day of the year

3 0
3 years ago
A gold nugget has a volume of 4.35cm and a mass of 84.96g. What is its density?
Minchanka [31]
Density equal mass/volume 
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3 0
4 years ago
Read 2 more answers
The CO 2-ion is stabilized by (A resonance. B inductive effects. c heterolysis. D potential energy.
FromTheMoon [43]

Answer: Option (A) is the correct answer.

Explanation:

A phenomenon where delocalization of pi electrons or non-bonding electrons takes place is known as resonance.

For example, in a CO^{2-}_{3} molecule two oxygen atoms contain -1 charge. And, delocalization of pi electrons takes place in order to attain stability.

When in a molecule, there occurs unequal sharing of bonding electrons by a chain of atoms then there occurs a permanent dipole moment. And, this effect is known as inductive effect.

So, basically more difference in electronegativity of the atoms in a molecule tend to cause inductive effect.

In CO^{2-}_{3}, there is not much difference in the electronegativity of carbon and oxygen atom.

Hence, resonance effect predominates inductive effect.

Potential energy is the energy obtained by an object due to its position.

Thus, we can conclude that the CO^{2-}_{3} ion is stabilized by resonance.

4 0
4 years ago
The specific heat capacity of a certain type of cooking oil is 1.75 J/(g⋅∘C). What is the amount of heat exchanged when the temp
anygoal [31]

Answer:

Q = -811440 J

Explanation:

Given data:

Mass of oil = 2.76 Kg (2.76× 1000 = 2760 g)

Initial temperature = 191 °C

Final temperature = 23°C

Specific heat capacity of oil = 1.75 J/g.°C

Solution:

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = 23°C - 191 °C

ΔT = -168°C

Q = 2760 g ×1.75 J/g.°C  ×-168°C

Q = -811440 J

Negative sign show heat is released.

6 0
3 years ago
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