chloerodgers56
25.02.2020 •
Chemistry
A chemist adds of a M sodium nitrate solution to a reaction flask. Calculate the mass in grams of sodium nitrate the chemist has added to the flask. Round your answer to significant digits.
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Ответ:
The question is incomplete. The complete question is:
A chemist adds 390.0 mL of a 2.1M sodium nitrate
solution to a reaction flask. Calculate the mass in grams of sodium nitrate the chemist has added to the flask. Round your answer to 2 significant digits.
70 grams
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.
where,
n = moles of solute
moles of
= 
Now put all the given values in the formula of molality, we get
Therefore, the mass in grams of sodium nitrate the chemist has added to the flask is 70 grams
Ответ:
the enthalpy change that occurs in a system when matter is transformed by a given chemical reaction, when all reactants and products are in their standard states.