CHEMISTRY · Single correct · A Level · Chemistry · Amount of substance · Amount of substance
Problem
Element M exists as diatomic molecules M₂ (blue), and element N is monatomic (orange).
• INITIAL sample: 6 M₂ molecules and 18 N atoms.
• MID-REACTION sample (exactly 50 % completion): 3 M₂ molecules, 12 N atoms, and 6 molecules of a product that contains one M atom bonded to one N atom.
• No other species are detected at this stage.
Which balanced chemical equation in the smallest whole-number coefficients is most consistent with these observations?
(a) M2+N→2MN
(b) 3M2+6N→6MN
(c) M2+2N→2MN
(d) M2+N→M2N