In the ammonia (NH) molecule shown below, the nitrogen atom starts with 5 valence electrons. Three of its electrons are involved in covalent bonds with hydrogen atoms. This
leaves lone pair(s).
H-N-H
H
Select one:
O a. one
b. three
O c. five
O d. seven
04:30
Clear my choice

120,630,890

step-by-step explanation:

110+10=120,620+10=630,880+10=890

the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :

1.43 x 10^-11 j the guy commented the awnser just making sure u see it .