A
3. 2071 (Set C) Q. No. 2 A divalent metal oxide contains 60% of
metal. What is atomic weight of metal?
Ans: Atomic weight: 24 amu
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of Metal in metal oxide = 60% Thus % of oxygen = 100-60 = 40% If we take the basis of calculation to be 100g, Therefore, Thus, equivalent weight of the metal is ... the metal is less reactive than carbon, but the metal is not in an oxide compound? ... 3 g of a metal oxide is completely converted to its metal chloride and it yields ...

Explanation:

the volume increases

answer : third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

explanation :

let us write down the given equations

equation 1 :

equation 2 :

equation 3 :

let us use hess's law to find out which 2 equations can be added to get the third equation.

let us reverse equation 2 and multiply it by 2. the new equation that we get is,

equation 4 :

let us add equation 1 & 4

the above equation is similar to equation 3 but has different value for dhrxn.

therefore third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol