Atoms that share electrons in a chemical bond have covalent bonds. An oxygen molecule (O2) is a good example of a molecule with a covalent bond. Ionic bonds occur when electrons are donated from one atom to another.
Organisms. Every living thing is an organism and without living organisms, we as a population wouldn’t be able to create a sustainable living environment.:)
Answer:
Mass of Fe produced = 44.7 g
Explanation:
Given data:
Mass of Fe produced in gram = ?
Mass of FeO react = 57 g
Solution:
Chemical equation:
2Al + 3FeO → 3Fe + Al₂O₃
Number of moles of FeO:
Number of moles = mass/ molar mass
Number of moles = 57 g/ 71.844 g/mol
Number of moles = 0.8 mol
Now we will compare the moles of Fe with FeO from balance chemical equation.
FeO : Fe
3 : 3
0.8 : 0.8
Mass of Fe:
Mass = Mass × molar mass
Mass = 0.8 mol × 55.845 g/mol
Mass = 44.7 g
Answer:
57
Explanation:
57 it's a good thing I didn't get a chance
Answer:
The standard enthalpy of formation of HgO is -90.7 kJ/mol.
Explanation:
The reaction between Hg and oxygen is as follows.
From the given,
Molar mass of HgO = 216.59 g/mol
Mass of HgO decomposed = 18.5 g
Amount of heat absorbed = 7.75 kJ
From the reaction,
The standard enthalpy of formation = 
During the decomposition of 1 mol of HgO , 90.7 kJ of energy absorbed.
For the formation of 1 mol of HgO , 90.7 kJ of energy is release
Therefore, the enthalpy of formation of mercury(II)Oxide is -90.7 kJ/mol
