The Earth rotates on an imaginary line called an axis, which runs through Earth from the North Pole to the South Pole. The rotation of the Earth causes day
Answer:
There are 3.01x10²³ molecules of sucrose
Explanation:
In order to calculate the number of molecules of any atom or compound, we need to use the Avogadro number which is 6.02x10²³. This number could represent atoms or molecules of any mole of compound or atom.
In other words, 1 mole of a certain atom or compound has 6.02x10²³ molecules or atoms.
we have 0.5 moles of sucrose, all we just need to do is a simple rule of 3:
If 1 mole contains 6.02x10²³ molecules
then 0.5 moles will contain:
n° molecules = 0.5 * 6.02x10²³ / 1
<h2>
n° molecules = 3.01x10²³ molecules of sucrose</h2>
Hope this helps
Answer:
1672 J
Explanation:
We are supposed to find out the energy released by water when cooled from 50° C to 30°C .
We have the relation that ,
H=msΔT
Information is given that s=4.18 J/ g*°C ,
m=20.0 g,
and ΔT is -20° C.
Hence by substituting we get,
H=-20*20*4.18
(minus symbol represents that energy is being released)
1672 J is release when water is cooled from 50° C to 30°C .
Answer:
placing a glass bottle in the recycling bin is what i think.
Explanation:
