Answer:
mass of Helium = mole of Helium x Molarmass of Helium
Explanation:
Mole of Helium = volume of Helium/ 22.4dm^3/mol
= 7.00 x 10^2/22.4
= 31.25mol
Mass of Helium = mole of Helium x Molarmass of Helium
= 31.25mol x 4g/mol
= 125g
Explanation:
The potassium fluoride will dissociate into potassium ions and fluoride ions in their aqueous solution.
So, when 1 mol of hexaaqua aluminium (III) reacts with 6 moles of fluoride ion it gives 1 mole of hexafluoroaluminate(III).
The reaction is given as:
Luckilly I work in a studio with molten metal and glass. For both glass and metal, when they reach their melting points you garb to two ends and pull them for as long as needed, This causes a "shock" in the metal or glass, basically when you shock it that when it is extremely hot and it is exposed to something much colder like the air we breath, It causes an instant cooling of the materials and the metal or glass becomes instantly a solid and room temperature or colder. The reason the metal doesn't break is because the shock also makes the material very strong and the tensil strength of metal is naturally very strong.
The speed of light changes as it passes from one medium to another medium due to the difference in the density of the two media. This is the reason for refraction of light also.
A.) All cells come from pre-existing cells. ~ rats don’t just appear in your house