Question

What mass of sodium hydroxide can be made by reacting 2.3g of sodium with water?(H=1, O=16, Na=23) 2 Na(s) + 2 H2O(l) --. 2 NaOH(Aq) + H2(g)

Answer 1

Explanation:

What is mean by accuracy

Answer 2

Answer:

Given that,

Atomic masses of sodium =23u

Oxygen =16u

Hydrogen =1u  

Now,

  2Na(g)+2H2O→2NaOH(aq)+H2(g)↑

 (2×23)u+2(2×1+1×16)u→2(23+16+1)u+(2×1)u

 46u+36u→80u+2u

 46g+36g→80g+2g

As per the balanced equation

46g of Na = 2g of Hydrogen

230 g of Na =230×462g=10g of hydrogen

I gram molar mass of any gas at STP

22.4 liters know as gram molar volume

2.0 g of hydrogen occupies =10.0g×2.0g22.4=112 liters

2 g of hydrogen, 1 mole of H2 contains 6.02×1023 x H molecules 10g of hydrogen contain

  =2.0g10.0g×6.02×1023

 =30.10×1023

 =3.01×1024mole