Which of these groups of metal would have the most similar properties? . a. ag, au, cu, zn. b. cr, fe, co, ni. c. al, si, p, s. d. mg, ca, sr, ba

D. Mg, Ca, Sr, Ba

Explanation:

Elements in the same group in the periodic table very often show a lot of similarity in physical properties and chemical properties. So in this case, the most probable answer would be D. Magnesium, Calcium, Strontium and Barium are going to share a lot of similar properties that the other group of elements are less likely to share.

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :

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