Answer:
The answer to your question is 24.325
Explanation:
Data
Magnesium-24 Abundance = 78.70%
Magnesium-25 Abundance = 10.13%
Magnesium-26 Abundance = 11.17%
Process
1.- Convert the abundance to decimals
Magnesium-24 Abundance = 78.70/100 = 0.787
Magnesium-25 Abundance = 10.13/100 = 0.1013
Magnesium-26 Abundance = 11.17/100 = 0.1117
2.- Write an equation
Average atomic mass = (Atomic mass-1 x Abundance 1) + (Atomic mass 2 x
Abundance-2) + (Atomic mass 3 x Abundance 3)
3.- Substitution
Average atomic mass = (24 x 0.787) + (25 x 0.1013) + (26 x 0.1117)
4.- Simplification
Average atomic mass = 18.888 + 2.533 + 2.904
5.- Result
Average atomic mass = 24.325
Answer:
The concentration of the magnesium fluoride solution is 0.0020 M
Explanation:
Step 1: Data given
Mass of MgF2 = 0.031 grams
volume = 250 mL = 0.250 L
Molar mass of MgF2 = 62.3 g/mol
Step 2: Calculate moles
Moles MgF2 = mass MgF2 / molar mass MgF2
Moles MgF2 = 0.031 grams / 62.3 g/mol
Moles MgF2 = 4.98 *10^-4 moles
Step 3: Calculate concentration of MgF2
Concentration MgF2 = moles MgF2 / volume
Concentration MgF2 = 4.98 *10^-4 / 0.250 L
Concentration = 0.0020 M
The concentration of the magnesium fluoride solution is 0.0020 M
The width of the cuvette is important in the spectrophotometric analysis since wider cuvette<span> translates to more absorbing species present in the path where light passes, hence more absorbance is read in the analysis. other factors include the concentration of the sample and the species itself present.</span>
Answer:
Explanation:
iron is element number 26 this means that it has 26 number of electron and proton in its atomic structure so its atomic number is 26