1. 2Mg + O₂ → 2MgO How many moles of MgO form if 6mol of oxygen react? *
2. 2Mg + O₂ → 2MgO How many moles of oxygen are required to react with 3.6mol of magnesium?
3. 2Mg + O₂ → 2MgO How many moles of magnesium are required to produce 5.5mol of MgO?

12 moles of MgO

1.8 moles of O₂

5.5 moles of Mg

Explanation:

These questions are all related and they involve comparing the number of moles of reactant to products.

Here we use molar relationship because they express what happens in a reaction much more better.

Problem 1:

                     2Mg    +     O₂     →    2MgO

We work from the known to the unknown;

              The known is oxygen gas;  which is 6moles

                       Unknown is MgO;

                    1 mole of O₂ produced 2 mole of MgO

                    6 moles of O₂ will produce  (6 x 2) moles of MgO

                                                                    = 12 moles of MgO

Problem 2:

               2Mg    +     O₂     →    2MgO

            Known;  3.6 moles of Magnesium

            Unknown;  number of moles of oxygen;

            2 moles of Mg reacted with 1 mole of O₂

          3.6 moles of Mg will react with     = 1.8 moles of O₂

Problem 3:

             2Mg    +     O₂     →    2MgO

           Known: number of of moles of MgO  = 5.5moles

           Unknown: number of moles of Mg = ?

          2 moles of MgO will be produced from 2 moles of Mg

         5.5 moles of MgO will be produced from   = 5.5 moles of Mg

water   molecules stay close to each other through cohesion, the collective action of hydrogen bonds between water molecules. cohesion plants draw water upwards from the root through the stem's transport tubes (xylem) to the leaf. this transport occurs even in large trees and against gravity. transpiration, evaporation of water from plant leaves, creates a tension on water molecules being pulled up from the stem and roots.

water also has high (the attraction of one substance to another) properties because of its polar nature. adhesion of water molecules to plant cell walls counteract gravity while water is transported from roots to leaves.

water exhibits a very high surface tension when compared to other liquids. surface tension is a property of a liquid that holds the surface together and allows it to resist an external force. by capillary action, the water forms concave menisci inside the pores. the high surface tension of water pulls the concavity outwards, generating enough force to lift water from the roots to the leaves of plants.

thus, cohesion, along with adhesion and surface tension creates a capillary action that keeps water molecules interacting and moving through the plants out to the leaf cells.

therefore, option d) is the correct answer.

explanation:

m=9

step-by-step explanation: