Wait… what do you need help with lol
Answer:
Heat up.
Explanation:
The faster molecules move the warmer an object becomes.
For example boiling water, when you boil water the water molecules will be moving extremely fast.
The slower molecules move, the colder an object is. For example an ice cube. All the molecules are only vibrating.
Hope this helps:)
Answer:
<h3>0.2498mol
</h3>
Explanation:
7gN2 x 
=0.2498mol N2
Nitrogen gas has the formula so therefore that means you would have to multiply the mass in the molar by 2. To solve for the number of moles you need to cancel out the grams, you do this by using the molar mass of nitrgoen gas. You get the value on in the denominator from the periodic table (atomic mass of element). The grams will cancel out, leaving you with the number of moles when you divide 7/2(14.01).
I think it’s A but I’m not sure. Sorry if I’m wrong
Answer:
126000J
Explanation:
From the question given, we obtained the following information:
M = 1500g
C = 4.2J/g°C
ΔT = 20°C
Q =?
Q= MCΔT
Q = 1500 x 4.2 x 20 =
Q = 126000J
