Answer:
I believe it is hydrogen for the first and methane for the second.
Explanation:
Answer to 8: The most dangerous or harmful gas to humans in the atmosphere would be carbon dioxide. But reserchers have found that methane levels in ancient air samples and found that scientists have been vastly underestimating the amount of methane humans are emitting into the atmosphere via fossil fuels.
Answer to 7: The type of gases present are as critical to density as elevation and gravity, and all are interrelated. Certain atmospheric gases will create thick atmospheres. For example, atmospheres with abundant hydrogen tend to be thicker as gases will combine with hydrogen for greater mass.
Hope this helps!
Answer:
When dealing with the force of gravity between two objects, there are only two things that are important –<u> mass, and distance</u>. The force of gravity depends directly upon the masses of the two objects, and inversely on the square of the distance between them.
Explanation:
This information confirms that temperature and solubility are related. The higher the temperature is, the more soluble.
The action was him hitting the ball the reaction was the ball moving after being hit
<span>n has oxidation number of +2; each O has an oxidation number of -2; each H has an oxidation number of +1, leaving you with an overall net charge of -2
</span> <span>Zn(OH)4= ; -2 = -4 + ?, Zn = +2 , the -4 is the charge on the 4 OH- ions</span>