<em>Let </em><em>the </em><em>mass </em><em>be </em><em>X </em><em>g</em>
<em>percentage </em><em>=</em><em> </em><em>X/</em><em> </em><em>6.</em><em>5</em><em>0</em><em> </em><em>*</em><em> </em><em>100 </em><em>=</em><em>2.</em><em>2</em><em>%</em>
<em>X=</em><em> </em><em>0.</em><em>1</em><em>4</em><em>3</em><em> </em><em>g</em>
<em>The </em><em>mass </em><em>is </em><em>0.</em><em>1</em><em>4</em><em>3</em><em> </em><em>g</em>
<span>coal , combustion reaction converts chemical energy into light and heat.</span>
Enthalpy is energy of bonds broken - energy of bonds formed. Here, the NH3 and O2 are broken and H2O and NO are formed. So the energy to break the NH3 bonds is 3 times the amount of energy it takes to break a N-H single bond (because there are three of them in a NH3 molecule) and then multiplied by 4 because there are four particles.
So the energy of the bonds broken is 12x the energy to break a N-H single bond plus 5x the amount of energy to break an O—O double bond (you don’t multiply this by anything because in each O2 molecule there is only one bond).
The energy of the bonds formed is 6*2 = 12 Times the amount of energy for a O-H single bond plus 4 times the amount of energy required to break a N—O double bond.
Subtract energy of bonds broken - energy of bonds formed and this is the change in enthalpy.
To know what type of bond it is, draw the Lewis structure.
Answer:
Honestly those are not really any of the ways but I would pick cook until mushy. Lemon juice works for things like fruits to make them last longer, salt and sugar have nothing to do with this, they are just for taste so I would say cook until mushy. Sorry if this is wrong.
A decrease in electronegativity happens when you go down group 17. This is due to the fact that as you go down the group, the atomic radius goes up which means <span>the first ionization energy decreases since shielding goes up.</span> All of those facts above shows that as you go down the group the atom looses the ability to draw electrons to itself which means that the electronegativity is going down the further down the group you go.
I hope this helps. Let me know in the comments if anything is unclear or if you want me to add any further explanation.