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Vanyuwa [196]
2 years ago
6

URGENT LOOK AT PICTURElook at the thing and choose all that matches ​

Chemistry
1 answer:
kozerog [31]2 years ago
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BRAINLIEST PLEASE

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A scientist claims to have discovered an element with 30 protons in its nucleus. He determines it has 60 electrons. Why is his i
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The number of electrons in an atom of an element being always the same

as the number of protons in its nucleus is False.

<h3>What is an Electron?</h3>

This is a sub-atomic particle which is negatively charged and is usually

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Electropositive elements donates electrons while electronegative

elements accepts electrons during chemical reactions which is why the

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Read more about Electrons here brainly.com/question/900457

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2 years ago
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Ammonia (NH3) burns in air to form nitrogen dioxide and water. Calculate grams of nitrogen dioxide produced if 4.0 grams of ammo
kenny6666 [7]
The balanced equation for the above reaction is;
4NH₃ + 7O₂  --> 4NO₂  + 6H₂O
stoichiometry of NH₃ to NO₂ is 4:4
the number of NH₃ moles consumed are - 4.0 g / 17 g/mol = 0.24 mol
number of NH₃ moles reacted are equivalent to number of NO₂ moles formed 
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8 0
3 years ago
Science chemistry Question:<br>​
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Are you doing a quiz?

6 0
2 years ago
Define significant figure. Discuss the importance of using the proper number of significant figures in measurements and calculat
anastassius [24]

Explanation:

Significant figure is the measure of how accurately something can be measured. It carries meaning contributing to its measurement resolution. It is important to use proper number of significant figures to get a precise measurement. For example, if we use a meter stick then measurements like 0.874 meters, or 0.900 meters, are good because they indicate that we can measure to the nearest millimeter. Whereas a measurement like 0.8 does not tell that a meter stick can measure to the nearest millimeter.

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Which sequence represents the relationship between pressure and volume of an ideal gas as explained by the kinetic-molecular the
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<h2>Answer : Option C) Smaller volume - crowded particles - more collisions - high pressure</h2><h3>Explanation : </h3>

The kinetic molecular theory of gases explains that if there is small volume of gas there will be more crowding of the gas molecules inside the container. The crowded gas molecules will collide with each other and also with the walls of container as a result, exchange of energies will take place. Which will increase the pressure inside the container, and will raise the pressure than the initial pressure.

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