How many moles of cesium (Cs) atoms are in 675g Cs?
2 answers:
Answer: 5.08 moles
Explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number of particles.
To calculate the number of moles, we use the equation:
given mass of Cesium (Cs) = 675 g
Molar mass of Cesium (Cs) = 132.90 g/mol
Putting in the values we get:
Thus there are 5.08 moles of cesium in 675 g of cesium.
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- The bond vibrations that can be observed in the IR spectrum of caffeine :
i) asymmetric, ii) symmetric, iii) wagging, iv) twisting, v) scissoring, vi) rocking
- while the observable stretching frequencies are ; 1700, 1300, 2900, 1500 and 3000.
Caffeine is a polyatomic molecule ( contains more than two atoms bonded via covalent bonds ) therefore its atoms can vibrate in three dimensions ( x, y, z ).therefore the bond vibrations that can be observed in the IR spectrum of caffeine are : asymmetric, symmetric, wagging, twisting, scissoring, and rocking.
The observable stretching frequencies that are in the IR spectrum of caffeine ; C = O is 1700 , C - H is 1300, C -H is 2900, C -N is 1500, and N -H = 3000.
Hence we can conclude The bond vibrations that can be observed in the IR spectrum of caffeine : i) asymmetric, ii) symmetric, iii) wagging, iv) twisting, v) scissoring, vi) rocking and the observable stretching frequencies are ; 1700, 1300, 2900, 1500 and 3000.
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