Question

QUESTION 4 For which compound does 0.256 mole weigh 12.8 g? a. CO2 b. CH3CI OCC2H6 d. C2H40 O e none of these QUESTION 5 How many atoms of calcium are present in 83.4 g of calcium? a. 1.25 x 1024 5.3.46 x 10-24 OC 5.02 x 1025 Od. 6.02 x 1023 e. None of these QUESTION 6 Select the set of coefficients from the response list that correctly balances the equation. _N2 + O2 NO a. 3,1,2 b. 1, 2,1 O c. 2, 1,2 d. 1,1,2 Click Save and Submit to save and submit. Click Save All Answers to save all answers.

Answer 1

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Ophen B CH2CI is coreet mass of Substance= molar mass x moles 44 xO 256 z mass of co2 mass of 3C = 50-5 xo 256 2 8 Am mass af 2 - 30 xo. 256 z 3.69 m mass of CHO 4Y x O 256 I2G 23 Jn 40m Ca -atom 602 x L0atoms S So in 83. m Co-atom 23-4m x 6.02x 1023 40 gm No of atms 25 xIo atom s CoTreet opton A Balanced reactim i N2 2NO is TRct. option D Scarmred with CamScanner CS