Look at this reaction:
3NO(g) ⇆ N2O(g) + NO2(g)
Keq = 1.8×10^(18) (at 298 K),
△H° = -155 kJ/mol.
Which of the following statements about this reaction is not correct?

a) ΔS < 0 because there is more order in the products than in the reactants.
b) This is an endothermic reaction.
c) The products are heavily favored at room temperature.
d) At a higher temperature, products would be less favored than at room temperature.

The correct option is;

b) This is an endothermic reaction

Explanation:

To answer the question, we analyze each of the options as follows;

a) ΔS < 0 because there is more order in the products than in the reactants.

The above statement is correct as there are fewer molecules in the product than in the reactants

b) This is an endothermic reaction.

The heat of the reaction is △H° = -155 kJ/mol which is negative, suggestive of an exothermic reaction, therefore the above equation is not correct

c) The products are heavily favored at room temperature.

Based on the high value of keq at 298 K the above statement is correct

d) At a higher temperature, products would be less favored than at room temperature.

The above statement is true as the amount of heat produced will be returned bck to the system tending to reverse the reaction.

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.