Question

 60 points! please help me! will appreciate it!

Answer 1

`\huge\boxed{\sf Mass = 726.96\ g}`

Step-by-step explanation:

In the reaction:

For 2 moles of Na, 1 mol of H₂ is produced

At STP,

1 mol of H₂ = 22.4 L/mol molar value

Converting 354 L to moles:

= volume / molar value

= 354 / 22.4

= 15.8 moles

We already know that:

1 mol of H₂ ↔ 2 moles of Na

So,

15.8 moles of H₂ ↔ 15.8 × 2 moles of Na

15.8 moles of H₂ ↔ 31.6 moles of Na

So, to produce 15.8 moles of H₂ (354 L), we need 31.6 moles of Na.

Converting 31.6 moles of Na into mass:

Mass = moles × molar mass

Mass = 31.6 × 23

Mass = 726.96 g

`\rule[225]{225}{2}`