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June 6, 2014

FORMAL REPORT

Group 8 SignatureLeah Rose Paras __________________

Krizza Mae Martin __________________Issabette Pajarillaga __________________Ryan Carlo Magpantay __________________

Carl Andrew Pimentel __________________

The Investigation of the Relationship among Number of Moles, Mass and Number of

Particles 

I.  Purpose- To describe the relationships among the number of moles, mass and number of

 particles.

II.  Procedure 

Measure the weight of each of thesubstances.

Measure 1 tbsp. of each of thesubstances: sulfur, aluminumfoil, salt and sugar.

Compute the number of moles ofeach of the substances usingmolar mass.

Compute the number of particles of

each substances using calculator.

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III.  Data 

Substances Sulfur Aluminum Foil Sugar Salt

Mass (g) 10g 5g 15g 15g

 No. of Moles 0.31 mol 0.19 mol 0.04 mol 0.26 mol

 No. of Particles 1.87x10 1.14x10 2.65x10 

1.57x10 

IV.  Calculation15g C12H22O11 x 1g = 0.044 mol x 6.02 x 10

23  = 2.65x10

22 

342.34g/mol

10g S x 1g = 0.31 mol x 6.02 x 1023

  = 1.87x1023

 

32.07 g/mol15g NaCl x 1g = 0.26 mol x 6.02 x 10

23  = 1.57x10

23

58.39 g/mol

5g Al x 1g = 0.19 mol x 6.02 x 1023

  = 1.14x1023

26.98g/mol

V.  Conclusions We conclude that the number of moles is directly related to the number of particles in each substances. And

as the mass increases, the number of moles also increases. This is because the mass is divided by the

formula mass to get the number of mole in a substance.

VI.  Discussion of Theory The experiment showed that there is a direct relationship between the number of particles and moles

 because as one variable increase, the other increases likewise. On the other hand, the mass of the sample is

related to the number of moles in terms of the computation of mass divided by the formula mass. Our

collected data showed these analyses within reasonable margins of error. The purpose of the lab was

fulfilled when we were able to use the mathematical model for this linear relationship to predict the number

of moles, particles and mass.

VII.  Questions 1.)  List down the substances based on the following order.

a.)  Increasing order (light to heaviest)

Aluminum foil ---- Sulfur ---- Sugar = Salt

 b.)  Increasing number of particles (lowest to highest amount)Sugar ---- Aluminum foil ---- Salt ---- Sulfur

c.)  Increasing number of moles (lowest to highest amount)

Sugar ---- Aluminum foil ---- Salt ---- Sulfur

2.)  Is the number of particles in the sample directly related to the number of moles?

The number of particles in the sample is directly related to the number of moles because as the numberof particles increases, the number of moles increases likewise.

3.)  Is the mass of the sample related to the number of moles? Explain your answer.Yes. The mass of the sample is related to the number of moles in terms of the computation of mass

divided by the formula mass.

4.)  Explain why one tablespoon of different substances does not have the same mass in grams(g), the same

number of moles and the number of particles:The different substances varies in mass, mole and particles because they have different components and

compositions which contribute to the different measurements.