Question

79 nitrogen with 29 hydrogen to formed NH3 1, which is the limiting reagent?
2, calculate the maximum amount of NH3 that be formed in the reaction?
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Answer 1

Answer:

Molarity (M) : The number of moles of a solute dissolved in 1 L (1000 ml) of the solution is known as the molarity of the solution.

Molarity of a solution

(M)=

molar mass of solute

mass of solute

×

volume of solution in mL

1000

∴0.2=

40

w

×

500

1000

so w=4gm.

Amount of sodium hydroxide present in 500ml of 0.2M solutions is 4 gm.

Answer 2

Halogens act as strong oxidising agents because they have high tendency to accept electron, i.e., they have high electron affinity values. The reduction potentials are high ( positive ) and decreased from FF to I .

.

.

The Group 2 alkaline earth metals include Beryllium, Magnesium, Calcium, Barium, Strontium and Radium and are soft, silver metals that are less metallic in character than the Group 1 Alkali Metals. Although many characteristics are common throughout the group, the heavier metals such as Ca, Sr, Ba, and Ra are almost as reactive as the Group 1 Alkali Metals. All the elements in Group 2 have two electrons in their valence shells, giving them an oxidation state of +2.

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