A sample of sodium reacts completely with 142 g of chlorine, forming 234 g of sodium chloride. What mass of sodium reacted?
Express your answer to three significant figures and include the appropriate units.
do this the same way I did the CO2 problem
Isn't it different because its chlorine and Sodium?
I really need help on this I still don't understand where your getting some of the units from. g/mols
g/mols is the molar mass of the substance. You can find the molar mass by taking the sum of the atomic masses in the substance.
I got 234g and it was wrong? Can you off anymore help plz?
To find the mass of sodium that reacted, we can set up a balanced chemical equation for the reaction between sodium and chlorine:
2 Na + Cl2 -> 2 NaCl
From the balanced equation, we can see that 2 moles of sodium react with 1 mole of chlorine to form 2 moles of sodium chloride.
To find the mass of sodium that reacted, we can use the given information about the mass of chlorine and the mass of sodium chloride formed.
Given:
Mass of chlorine = 142 g
Mass of sodium chloride formed = 234 g
Step 1: Calculate the molar mass of chlorine (Cl2):
The molar mass of chlorine (Cl2) is the sum of the atomic masses of chlorine (Cl) multiplied by 2 (since there are 2 chlorine atoms in Cl2).
Molar mass of Cl2 = (35.45 g/mol) x 2 = 70.90 g/mol
Step 2: Calculate the number of moles of chlorine:
Number of moles of Cl2 = Mass of chlorine / Molar mass of Cl2
Number of moles of Cl2 = 142 g / 70.90 g/mol = 2.00 mol
Step 3: Calculate the number of moles of sodium chloride formed:
From the balanced equation, we know that 2 moles of sodium chloride (NaCl) are formed for every 1 mole of chlorine (Cl2) that reacts.
Number of moles of NaCl = 2.00 mol
Step 4: Calculate the molar mass of sodium chloride (NaCl):
The molar mass of NaCl is the sum of the atomic masses of sodium (Na) and chlorine (Cl).
Molar mass of NaCl = (22.99 g/mol) + (35.45 g/mol) = 58.44 g/mol
Step 5: Calculate the mass of sodium that reacted:
The mass of sodium that reacted can be calculated using the molar mass of sodium chloride and the number of moles of sodium chloride formed.
Mass of sodium = Number of moles of NaCl x Molar mass of NaCl
Mass of sodium = 2.00 mol x 58.44 g/mol = 116.88 g
Therefore, the mass of sodium that reacted is 116.88 g.