Specific Heat-the heat required to raise the temperature of the mass of a substance by a cetain amount
Adhesion-attraction amoung molecules of a different substance.
Cohesion-attraction amoung molecules in a substance
Hydrogen Bonding- a bond between an hydrogen atom and a negative atom
Polar- difference of charge across the molecule
<span>mass percent of carbon (c) in CCl</span>₄ = mass of C/mass of CCl₄
= 12 x 100/153.8 = 7.8%
Answer:
1 mole
Explanation:
m(Fe) = 112 g
n(Fe₂O₃) = ?
First you must calculate how many moles of Fe is in 112 g of Fe:
n(Fe) = m(Fe) / Ar(Fe) = 112 g / 55,85 g moles⁻¹ = 2 moles
Now, from reaction you compare moles of Fe and Fe₂O₃ :
2 n(Fe₂O₃) = n(Fe)
n(Fe₂O₃) = n(Fe) / 2 = 1 mole
Answer:
51.65%
Explanation:
Magnesium carbonate pentahydrate is 
1 mole of the compound contains 5 moles of water. The water can be extracted by heating the the compound and allowing the water to condense.
1 mole of the compound contains 5 moles of water molecule
mole = mass/molar mass
1 mole of the compound weighs: 1 x 174.3903 = 174.3903 g
5 moles of water weighs: 5 x 18.01528 = 90.0764 g
Percentage by mass of hydrate in magnesium carbonate pentahydrate
= 90.0764/174.3903 x 100%
= 51.65%
