Question

You are performing an experiment in your lab. to compare with other experiments your results must be in moles. during your final step you burn a strip of magnesium (mg), which results in 187 grams of magnesium oxide (mgo). how should you enter your results?

Answer 1

4.6 moles in 187 grams of magnesium oxide (mgo).

What is mole explain with example?

• One mole is defined as the amount of substance containing as many elementary entities (atoms, molecules, ions, electrons, radicals, etc.) as there are atoms in 12 grams of carbon - 12(6. 023×1023).
• The mass of one mole of a substance equals to its relative molecular mass expressed in grams.
• The relative formula mass of a compound is calculated by adding together the relative atomic mass values for all the atoms in its formula.
• Moles are units used to measure substance amount. Chemistry (Single Science) Atomic structure.

To solve ,

             number of moles is equals to the mass in grams divided by RFM

                 RFM=16+24.3=40.3

                            =187/40.3

                             =4.6 moles of MgO

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