Answer:
The mass of iron needed to react with the oxygen is 70 g.
Explanation:
The balanced chemical reaction between iron and oxygen is given as;
4Fe + 3O₂ ----------> 2Fe₂O₃
Molecular mass of 3O₂: 3(16 x 2) = 96 g
Molecular mass of 4Fe: 4(56) = 224 g
96 g of O₂ ---requires--------> 224 g of Fe
30 g of O₂ -------requires--------->? Fe
= (30 x 224) / 96
= 70 g
Therefore, the mass of iron needed to react with the oxygen is 70 g.
Answer:
i gussss D is the answer may be
The question is incomplete. Here is the full version
Select the substance that has the higher boiling point. Select the substance that has the higher boiling point. a)C3H8 b)CH3OH c)CH3OCH3
Answer:
b)CH3OH
Explanation:
a)C3H8 The dominant intemolecular force here are London dispersion forces.
Dipole-dipole forces cancel out because the molecule is symmetric
b)CH3OH - The dominant intermolecular force is hydrogen bonding
c)CH3OCH3 - The dominant intemolecular force here are London
dispersion forces. Dipole-dipole forces cancel out because
the molecule is symmetric
Answer:
To calculate the number we need molar mass.
Mass is protons + neutron so the mass number is 14