I need help ASAP pls! Add the equations and simplify to get a balanced equation: MnO4-(aq)+Cl-(aq) —> MnO2(s)+Cl2(g)(unbalanced)

Which step in naming unsaturated hydrocarbons is used for alkenes but not alkynes

Find the mass in grams of 1.37x1020 particles of h3po4

Balance and in which category does it fit in? single or double displacement or synthesis or decomposition? (a) k2 o → k + o2 (b) na + i2 → nai (c) cu(no3 )2 + naoh → cu(oh)2 + nano3 (d) kclo3 → kcl + o2 (e) ca(no3 )2 + hbr → cabr2 + hno3 (f) sn(oh)2 → sno + h2 o (g) p4 + n2 o → p4 o6 + n2 (h) fe + al2 (so4 )3 → feso4 + al (i) alcl3 + na2 co3 → al2 (co3 )3 + nacl (j) c3 h6 + o2 → co2 + h2 o