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KengaRu [80]
3 years ago
15

An objective that revolves around a planet is... A) star B) moon C)dwarf planet

Chemistry
1 answer:
Evgen [1.6K]3 years ago
5 0

Answer:

B. Moon

Explanation:

An object revolving around a star is a planet or a dwarf planet (dependent on size).

An object revolving around a planet is a moon.

An object revolving around a black hole is a goner.

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Molecules have ionization energies, just like atoms do. The ionization energy for molecular oxygen, for example, is 1314 kJ/mol.
taurus [48]

Answer:

91.1835 nm

Explanation:

Given that the ionization energy of the oxygen molecule = 1314 kJ/mol

It means that

1 mole of oxygen molecules can be ionized by the energy = 1314 kJ = 1314000 J

1 mole of molecules contains 6.022 × 10²³ atoms

So,

6.022 × 10²³ atoms of oxygen molecules can be ionized by the energy = 1314000 J

1 atom require \frac{1314000}{6.022\times 10^{23}}\ J of energy

Energy = 2.18\times 10^{-18}\ J

Also

E=\frac {h\times c}{\lambda}

Where,  

h is Plank's constant having value 6.626\times 10^{-34}\ Js

c is the speed of light having value 3\times 10^8\ m/s

\lambda is the wavelength

So,

\lambda=\frac {h\times c}{E}

\lambda=\frac{6.626\times 10^{-34}\times 3\times 10^8}{2.18\times 10^{-18}}\ m

\lambda=91.1835\times 10^{-9}}\ m

Also,

1\ nm=10^{-9}}\ m

So, wavelength = 91.1835 nm

6 0
3 years ago
A 15.75 g piece of iron absorbs 1097 joules of heat energy, and its temperature changes from 25°C to 177°C. Calculate the specif
vekshin1

The answer for the following problem is mentioned below.

Explanation:

Given:

mass of iron (m) = 15.75 grams

heat (q) = 1097 J

initial temperature (t_{1}) = 25°C

final temperature (t_{2}) = 177°C

To find:

specific heat (c)

We know;

 c = q ÷ mΔT

where;

c represents the specific heat

q represents the heat

m represents the mass

t represents the temperature

c = \frac{1097}{15.75 * (177-25)}

c = 0.45 J/kg°C

<u><em>Therefore the specific heat capacity of iron is 0.45 J/kg°C.</em></u>

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3 years ago
Which of the following is a definition of a line segment?
bogdanovich [222]

Answer:   So, a line segment is a piece or part of a line having two endpoints. Unlike a line, a line segment has a definite length.

Explanation:

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How many milliliters are in a 3.5 kL
Firdavs [7]

Answer: 3.5e+6 ; 0.0000035

Explanation: Weird question but this is the answer

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Arte-miy333 [17]

B. warm air rises and takes heat with it; eventually it cools and sinks

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