Question

If the chemist has 35.0 g Na, what mass of chlorine must he or she use to react completely with the sodium?

Answer 1

If the chemist has 35.0 g Na, what mass of chlorine must he or she use to react completely with the sodium?

Finally, solve (remember significant figures):

A:

54.1

*Correct of edg*

Answer 2

53.2 grams of chlorine must he or she use to react completely with the sodium.

The balanced chemical reaction between sodium and chlorine is given below.

2Na + Cl2  → 2NaCl

So, sodium and chlorine react with each other to form NaCl in the molar ratio of 2:1.

The number of moles of sodium = given mass of Na/molar mass of Na

The number of moles of sodium = 35g / 23g/mol

The number of moles of sodium = 1.52 moles

Since, The 2 moles of sodium reacts with 1 moles of chlorine.

The 1.52  moles of sodium reacts with 1×1.52/2 moles of chlorine.

The 1.52  moles of sodium reacts with 0.76 moles of chlorine.

Let mass of the chlorine be X.

Number of moles of chlorine = given mass of Cl/Molar mass of Cl = 0.76mole

Number of moles of chlorine = X / 70 g/mol = 0.76 mole

Mass of chlorine (X) = 0.76×70 grams

Mass of chlorine (X) = 53.2 grams

What is chemical reaction ?

The process in which one or more chemicals transforms into one or more other chemicals is called chemical reaction.

To learn more about chemical reaction here.

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