Chapter 1 Matter by FAZIAH BINTI AHMAD@ABDULLAH KM-Pensyarah https://padlet.com/bm2136/w8ob4hvj4c6mpzy5 en-us 2023-07-26 02:12:39 UTC 2025-12-19 23:41:55 UTC hello@padlet.com Isotopic Notation bm2136 https://padlet.com/bm2136/w8ob4hvj4c6mpzy5/wish/2651212347 2023-07-26 02:19:53 UTC https://padlet.com/bm2136/w8ob4hvj4c6mpzy5/wish/2651212347 bm2136 https://padlet.com/bm2136/w8ob4hvj4c6mpzy5/wish/2651212783 Average mass has unit of amu @ u. While Ar and Mr are dimensionless. 
How to convert average mass (with unit) to Ar/Mr (without unit)?]]> 2023-07-26 02:20:33 UTC https://padlet.com/bm2136/w8ob4hvj4c6mpzy5/wish/2651212783 bm2136 https://padlet.com/bm2136/w8ob4hvj4c6mpzy5/wish/2651215633 2023-07-26 02:24:58 UTC https://padlet.com/bm2136/w8ob4hvj4c6mpzy5/wish/2651215633 Solute vs Solvent vs Solution bm2136 https://padlet.com/bm2136/w8ob4hvj4c6mpzy5/wish/2651224195 Can you distinguish them? ]]> 2023-07-26 02:36:21 UTC https://padlet.com/bm2136/w8ob4hvj4c6mpzy5/wish/2651224195 Isotopes of Carbon bm2136 https://padlet.com/bm2136/w8ob4hvj4c6mpzy5/wish/2651241284 Nucleon number= Atomic mass = Mass number
Formula to find average mass of C?
Remember Qimi/Qi !]]> 2023-07-26 02:59:47 UTC https://padlet.com/bm2136/w8ob4hvj4c6mpzy5/wish/2651241284 Atom bm2136 https://padlet.com/bm2136/w8ob4hvj4c6mpzy5/wish/2652428702 3 subatomic particles- protons, electrons and neutrons]]> 2023-07-28 03:02:32 UTC https://padlet.com/bm2136/w8ob4hvj4c6mpzy5/wish/2652428702 Subatomic particles bm2136 https://padlet.com/bm2136/w8ob4hvj4c6mpzy5/wish/2652438755 Did you notice that?]]> 2023-07-28 03:23:46 UTC https://padlet.com/bm2136/w8ob4hvj4c6mpzy5/wish/2652438755 bm2136 https://padlet.com/bm2136/w8ob4hvj4c6mpzy5/wish/2652461664 Cth soalan:
Given molality of NaOH solution is 2.5m. If the density of solution is 1.5g/mL, calculate molarity of the solution.

Tips: Assume mass of solvent 1 kg. 

*you may assume from density but some students get stuck]]> 2023-07-28 04:12:34 UTC https://padlet.com/bm2136/w8ob4hvj4c6mpzy5/wish/2652461664 Dilution bm2136 https://padlet.com/bm2136/w8ob4hvj4c6mpzy5/wish/2675906174 Example:
How many liters of 0.350 M NaOH solution can be prepared from 400.0 mL of 3.60 M solution?

Answer:
M1V1 = M2V2
(3.6M)(400mL) = (0.35M)V2
V2 = 4,110 mL
      = 4.11 L

How much water added?
VH2O = (4110-400)mL
             = 3710 mL


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