By crushing the salt, you are performing a physical change because you aren't altering the chemical makeup of the salt, just the physical form. Hope this helps! :)
Answer:
<u><em>When balloon filled with the helium gas is left in the car at night along with the decrease in temperature the size of the balloon will get smaller or it will look like little deflated</em></u>.The above observation can be explained on the basis of Charles law:The law states that 'under constant pressure ,the volume occupied by the gas is directly proportional to the temperature of the gas'. (At constant pressure)Temperature desecrate volume will also decreases and vice versa.So, with decrease in temperature at night the temperature of the gas in the balloon will also get decreased due to which the volume of the balloon will also get decreased.
Explanation:
A lone pair is a pair of valence electrons that are not shared with another atom and is sometimes called a non-bonding pair.
Answer:
0.0833 moles of O₂
Explanation:
Most usual Law to solve this sort of problem, is the Ideal Gases Law
Pressure . Volume = number of moles . R . Temperature
where R is the Ideal Gases Constant → 0.082 L.atm/mol.K
First of all we need to convert the pressure from kPa to atm, because the Units of R
320 kPa . 1 atm / 101.3 kPa = 3.16 atm
Now, you replace data:
3.16 atm . 0.45L = mol . 0.082 L.atm/mol.K . 280K
(3.16 atm . 0.45L) / (0.082 L.atm/mol.K . 280K) = mol
0.0833 moles of O₂
Answer:
Protein
Explanation:
Cholesterol is actually part lipid, part protein
