Which of the following is not correct? 1 mol of 03 has 1.81 times 10^24 O atoms

Question

Which of the following is not correct? 1 mol of 03 has 1.81 times 10^24 O atoms 1 mol of CI_2 has 35.45 g CI 1 mol of NaCI has 6.022 times 10^23 Na^+ 1 mole of Ca_3 N_2 has 3 moles Ca^+2. 15.0 g NH_3 has how many moles of H atoms? 2.64 0.880 1.59 times 10^24 5.30 times 10^23 15.0g AI(NO_3)_3 has how many NO_2? 4.24 times 10^22 3.82 times 10^23 2.54 times 10^23 1.27 times 10^23 8.00 g of has how many H atoms? 0.614 123 times 10^23 3.70 times 10^23 6.17 times 10^23 The mass of 1.21 times 10^20 atoms of sulfur is 644 mg 32.06 g 0.200 mg 2.00 mg A sample of ethane. C_2 H_6 is found to contain 3.00 times 10^22 atoms of H. How many molecules of C_2 H_6 are present? 6.00 times 10^22 1.80 times 10^23 0.0498 5.00 times 10^21 10.0 g CCI_4 - ? molecules CCI_4 0.0650 1.66 times 10^-23 3.92 times 10^22 2.55 times 10^21 Determine the number of moles of aluminum in 96.7 g of AI. 0.279 3.58 4.21 7.43

Explanation / Answer

Ans 3. b ) 1 mol of Cl2 has 35.45 g Cl.

The atomic mass of Cl is 35.45 u , so the mass of 1 mole of Cl2 is 70.9 g / mol and not 35.45 g/mol.

Rest all other options are correct , as 1 mole of any compound has 6.022 x 1023entities , also known as avagadro's number or NA

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