Find the moles of CaO

divide mass (2.0g) by the RFM which is 56 (Ca is 40 add that to O which is 16 making 56) this gives 0.0356 moles.

Find the theoretical mass by multiplying the moles of CaO (which is 0.0356 as there are no balancing number making the ratio 1:1) by the RFM of Ca(OH)2 which is 74 (40+16+16+1+1)

74 (Ca(OH)2 RFM) x 0.0357 (CaO moles) = 2.6g which is the theoretical mass of Ca(OH)2

Find percentage yield by dividing the actual mass of Ca(OH)2 by the theoretical and then x100 this Should give you 82.3%

8 0

3 years ago

N2 + 3 H2 --> 2 NH3

Anna71 [15]

Answer:

4 moles of NH3 will be produced

Explanation:

The reaction expression is given as:

N₂ + 3H₂ → 2NH₃

We have to check that the equation of the reaction is balanced.

Then;

if 2 mole of N₂ reacts;

1 mole of N₂ will react with 3 mole of H₂ to produce 2 mole of NH₃

2 mole of N₂ will react with (2x3)mole of H₂ to produce (2x2)mole of NH₃

6mole of H₂ to produce 4 mole of NH₃

7 0

3 years ago

Sodium metal reacts with chlorine gas in a combination reaction. Write a balanced equation to describe this reaction. Click in t

umka2103 [35]

Answer:

Na + Cl ⇒ NaCl

Explanation:

Skeleton equation: Na + Cl ⇒ NaCl

This is already balanced so that is the answer.

6 0

3 years ago