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3 years ago

Determine a planet from our solar system is located far from the sun. Describe the size and composition of this planet

Chemistry

2 answers:

amid [387]3 years ago

8 0

Jupiter is a very large planet mainly made up of hydrogen

Nataliya [291]3 years ago

6 0

Answer:

We could say that it is the planet Neptune

Explanation:

Neptune a gaseous planet. It is the planet furthest from the Sun being at an approximate distance of 4,500 million kilometers, its mass is 1,0241 x 10^26 kg. Neptune is composed of ice and rock, with a heavy and solid core similar to Earth's. It does not have a solid surface. It is a dense planet and its magnetic field is 27 times stronger than Earth's. Neptune has an atmosphere of 74% hydrogen, 25% helium and 1% methane.

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How can we keep our voices in tip top shape? Please list the three things we can do to help our voices. Which would you say is m

Alisiya [41]

Answer:

help our vocos

Explanation:

5 0

3 years ago

It takes 495.0 kJ of energy to remove 1 mole of electron from an atom on the surface of sodium metal. How much energy does it ta

Zigmanuir [339]

Answer:

$\lambda=241.9\ nm$

Explanation:

The work function of the sodium= 495.0 kJ/mol

It means that

1 mole of electrons can be removed by applying of 495.0 kJ of energy.

Also,

1 mole = $6.023\times 10^{23}\ electrons$

So,

$6.023\times 10^{23}$ electrons can be removed by applying of 495.0 kJ of energy.

1 electron can be removed by applying of $\frac {495.0}{6.023\times 10^{23}}\ kJ$ of energy.

Energy required = $82.18\times 10^{-23}\ kJ$

Also,

1 kJ = 1000 J

So,

Energy required = $82.18\times 10^{-20}\ J$

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 $3\times 10^8\ m/s$

So,

$79.78\times 10^{-20}=\frac {6.626\times 10^{-34}\times 3\times 10^8}{\lambda}$

$\lambda=\frac{6.626\times 10^{-34}\times 3\times 10^8}{82.18\times 10^{-20}}$

$\lambda=\frac{10^{-26}\times \:19.878}{10^{-20}\times \:82.18}$

$\lambda=\frac{19.878}{10^6\times \:82.18}$

$\lambda=2.4188\times 10^{-7}\ m$

Also,

1 m = 10⁻⁹ nm

So,

$\lambda=241.9\ nm$

6 0

3 years ago

How do you slow down the motion of a gas particle?

jasenka [17]

I think u turn down the heat not to sure

3 0

3 years ago

Read 2 more answers

You need to go through a closed door to escape a fire. which action should you take?

Alisiya [41]

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.

If you need to go through a closed door to escape a fire the action that you should take is letter B or <span>feel the door first using the back of your hand. </span>

6 0

3 years ago

Read 2 more answers

Write the balanced equation for the decomposition of hydrogen peroxide to form water and oxygen.

Lerok [7]

Hydrogen peroxide is H2O2, while water is H2O and oxygen (a diatomic gas) is O2. The (unbalanced) reaction is:
H2O2 --> H2O + O2
Notice that the H2O2 has 2 H atoms, and so does H2. This means that both must have the same coefficients, and we can adjust the coefficient of O2. Since H2O2 has 2 O atoms, and H2O has 1, we multiply O2 by 1/2:
H2O2 --> H2O + (1/2)O2
This has an equivalent number of H and O atoms on either side, but we want the coefficients to be whole numbers, so we multiply everything by 2:
2H2O2 --> 2H2O + O2

7 0

3 years ago