How many moles of hydrogen gas are produced when 0.4 moles of sodium react with excess water? 2Na + 2H2O -> 2NaOH +H2

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.

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"

space exploration has led to the development and technological improvement of many everyday items. (if this answer is wrong i will find the right answer) : )

explanation:

a