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3 years ago

Science pls help me having trouble on the third one

Chemistry

2 answers:

Ira Lisetskai [31]3 years ago

6 0

The diameters of the spheres are 72.5 meters square

neonofarm [45]3 years ago

6 0

Answer:

ijcQwertyjkllmnnbbvcxzssssdttyyjnnnvvcxyj

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Helppppp!!!! Please.....

Inessa05 [86]

Club soda so A, you just gotta match the color that it says for it to the chart and it’ll show the identity the ph which is four I believe It said

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3 years ago

Which substance can be broken down by a chemical change

ELEN [110]

Lots of substances. Rocks, metals, minerals, you name it.

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3 years ago

Read 2 more answers

Question 1 of 15 2 Points What is another name for a pure substance? Answer here

maksim [4K]

Answer:

element

Explanation:

elements consist of pure substances

4 0

3 years ago

If the molecule could move upward without colliding with other molecules, then how high would it go before coming to rest? Give

tankabanditka [31]

The maximum height at which nitrogen molecule will go before coming to rest is 14 kilometers.

Given:

The nitrogen gas molecule with a temperature of 330 Kelvins is released from Earth's surface to travel upward.

To find:

The maximum height of a nitrogen molecule when released from the Earth's surface before coming to rest.

Solution:

The maximum height attained by nitrogen gas molecule = h
The temperature of nitrogen gas particle = T = 330 K

The average kinetic energy of the gas particles is given by:

$K.E=\frac{3}{2}K_bT\\\\K.E=\frac{3}{2}\times 1.38\times 10^{-23} J/K\times 330 K\\\\K.E=6.381\times 10^{-21} J$

The nitrogen molecule at its maximum height will have zero kinetic energy as all the kinetic energy will get converted into potential energy

The potential energy at height h = $P.E = 6.381\times 10^{-21} J$
Molar mass of nitrogen gas = 28.0134 g/mol
Mass of nitrogen gas molecule = m

$m= \frac{ 28.0134 g/mol}{6.022\times 10^{23} mol^{-1}}=4.652\times 10^{-23} g\\\\1g=0.001kg\\\\m=4.652\times 10^{-23}\times 0.001 kg\\\\=4.652\times 10^{-26} kg$

The acceleration due to gravity = g = 9.8 m/s^2
The maximum height attained by nitrogen gas molecule = h
The potential energy is given by:

$P.E=mgh$

$6.381\times 10^{-21} J=4.652\times 10^{-26} kg\times 9.8 m/s^2\times h\\\\h=\frac{6.381\times 10^{-21} J}{4.652\times 10^{-26} kg\times 9.8 m/s^2}\\\\h=13,996.6 m\\\\1 m = 0.001 km\\\\h=13,996.6 m=h=13,996.6\times 0.001 k m\\\\=13.9966 km \approx 14 km$

The maximum height at which nitrogen molecule will go before coming to rest is 14 kilometers.

Learn more about the average kinetic energy of gas particles here:

brainly.com/question/16615446?referrer=searchResults

brainly.com/question/6329137?referrer=searchResults

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2 years ago

How many mg of O2 will react with the TNT?

Tanzania [10]

TNT has the molecular formula: C7H5N3O6. And hence, when reacted in oxygen gas, you get what is known as combustion reaction. the reaction is: C7H5N3O6+O2→CO2+N2+H2O

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3 years ago