Answer:
well you add them 2.50 + 5.50 = 7.00 thats what it equal
Hey There!
Ideal gas equation: PV = nRT where P is pressure, V is volume, n is moles of gas, R is molar gas constant and T is temperature.
Since P, R and T are constant, V/n = constant
V1 = 2.00 L, V2 = 3.30 L
n1 = (2.00 g)/(4.00 g/mol) = 0.5 mol, n2 = ?
V1/n1 = V2/n2
2.00/0.5 = 3.30/n2
n2 = 0.825 mol
Moles of He added = n2 - n1
= 0.825 - 0.5 = 0.325 mol
Mass of He added = moles x atomic mass
= 0.325 * 4.00 = 1.30 g of He
the sand is more likely to be hot because it is on land and the sun can be very hot so i think it would heat the sand. but water is less likely to be heated because its water. and the sun's heat on it would still affect it yes, but not as much as sand
They can change properties completely
<span>They can be separated </span>
<span>They form a new set of elements and compounds </span>
<span>The elements become part of the original compounds</span>