2 atoms of hydrogen
2 atoms of oxygen
1 atom of nitrogen
3 atoms of hydrogen
3 atoms of carbon
8 atoms of hydrogen
Using charles law
v1/t1=v2/t2
v1=49ml
v2=74
t1=7+273=280k
t2=?
49/280=74/t2
0.175=74/t2 cross multiply
0.175t2=74
t2=74/0.175
t2=422k or 149celcius
Melting point- the temperature at which a substance has changed from a solid to a liquid
freezing- the temperature at which a substance chanes from liquid to a solid
boiling point- the temperature at which a substance changes from a liquid to a gas phase
Answer:
1 mol of K
Explanation:
The reaction is: 2K + Cl₂ → 2KCl
2 moles of potassium react with 1 mol of chlorine to make the salt, potassium chloride
If you see the stoichiometry from reactants, 2 moles of K need 1 mol of Cl₂ to react, so 1 mol of Cl₂ needs 2 moles of K, to react too.
We can make a rule of three, to reach the answer:
1 mol of Cl₂ needs 2 moles of K to react
Then, 0.5 moles of Cl₂ must react with (0.5 . 2) / 1 = 1 mol of K