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CHEM 101L Lab 4 The Molar Mass! RATED A+, Assignments of Chemistry

CHEM 101L Lab 4 The Molar Mass

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2022/2023

Available from 02/27/2024

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lOMoARcPSD|3013804
Lab 4 Molar
Mass
CHEM101L
lOMoARcPSD|3013804
Student Name:
Access Code (located on the lid of your lab kit): RP-00000088280
Pre-Lab Questions:
1.
Imagine you are a guest speaker at a kindergarten class and you are asked to explain
Avogadro’s
number. What would you say and why?
Avogradro´s Number (Na) is a constant wich is equal to 6.022*10^23. Far any element
compound when 6.022 *10^23 paeticles are combined together it can be referred to 1
mole. Avogradro’s number helpt to relate number of particles to number of moles.
2.
Draw a diagram explaining the relationship between atoms, moles, and molecules. Insert
your
drawing with your handwritten name and access code clearly visible.
3. Why is Avogadro’s number referred to as a mole?
Avogadro's number is the number of carbon-12 atoms found in 12g of pure carbon-12. The
mole (also denoted as mol) represents the quantity of elementary particles/atoms/molecules.
So, 1 mol contains 6.02214 × 10
23
elementary entities of the substance. Generally we will get
moles from the formula
pf3
pf4

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Lab 4 Molar

Mass

CHEM101L

lOMoARcPSD|

Student Name:

Access Code (located on the lid of your lab kit): RP-

Pre-Lab Questions:

  1. Imagine you are a guest speaker at a kindergarten class and you are asked to explain Avogadro’s number. What would you say and why? Avogradro´s Number (Na) is a constant wich is equal to 6.022*10^23. Far any element compound when 6.022 *10^23 paeticles are combined together it can be referred to 1 mole. Avogradro’s number helpt to relate number of particles to number of moles.
  2. Draw a diagram explaining the relationship between atoms, moles, and molecules. Insert your drawing with your handwritten name and access code clearly visible.
  3. Why is Avogadro’s number referred to as a mole? Avogadro's number is the number of carbon-12 atoms found in 12g of pure carbon-12. The mole (also denoted as mol) represents the quantity of elementary particles/atoms/molecules. So, 1 mol contains 6.02214 × 1023 elementary entities of the substance. Generally we will get moles from the formula

Lab 4 Molar

Mass

CHEM101L

Experiment 1: Percent Sugar in Bubble Gum

Table 1: Sucrose Data Mass of weight boat Mass of weigh boat + un- chewed gum Mass of un- chewed gum Mass of chewed gum Mass of sugar Percent of sugar 2.4g 8.4g 6g 4.7 1.3 21,6%

Post-Lab Questions

  1. What is the percent sugar? Show your calculations. (1.3/6)*100=21.
  2. What is the molar mass of sugar C 12 H 22 O 11? Show your calculations. C12H22O11 = 12 (C)+22 (H)+ 11(O) C12H22O11=12(12.01)+22(1.008)+11(16.00) C12H22O11= 342
  3. Convert the mass of dissolved sugar to moles. Show your calculations. Moles= weight/ molar mass. 1.3/342=0.
  4. Convert the moles of sugar to molecules of sugar. Show your calculations. from Avogadro's constant 1mole= 6.022x10^23molecules thus =0.00380moles will be =0.00380moles x ( 6.022x10^23molecules /1mole) =2.28x10^21molecules

Lab 4 Molar

Mass

CHEM101L