one mole
If we look this number up for helium, we find that helium has a molar mass of 4.0 grams per mole. So one mole of helium has a mass of 4.0 grams. We can use the molar mass as a conversion factor. Two moles of helium times four grams of helium per mole of helium is equal to eight grams of helium.
∆H = mc∆T
c = specific heat capacity
c of water = 4200 J/kg °C
∆H = 1 * 4200 * (100°C - 25°C)
∆H = 315000J
∆H = 315 KJ
Answer:
gold is metal which is a very good conductor for electric current and most chips are made out of it.
Flower !! !!! !! Yea yes yes
Answer:
W and X
Explanation:
isotopes : are masses of atoms with the same number of proton and electron but different neutron .
W and X have the same number of protons and different number of neutrons.
