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How does a catalyst increase the rate of a reaction? A. It increases the average kinetic energy of the colliding particles. B. It lowers the activation energy so that a greater proportion of collisions are successful. C. It makes the reaction more exothermic.…
Which equilibrium would shift to the left when the pressure is increased at constant temperature? A. H2(g) + I2(g) ⇌ 2 HI(g) B. C(s) + CO2(g) ⇌ 2 CO(g) C. N2(g) + 3 H2(g) ⇌ 2 NH3(g) D. 2 NO2(g) ⇌ N2O4(g)
Which equilibrium shifts to the left when the pressure on the system is increased at constant temperature? A. CaCO3(s) ⇌ CaO(s) + CO2(g) B. H2(g) + I2(g) ⇌ 2 HI(g) C. N2(g) + 3 H2(g) ⇌ 2 NH3(g) D. 2 SO2(g) + O2(g) ⇌ 2 SO3(g)
What is the formula of the conjugate base of methanoic acid, HCOOH? A. HCOOH2+ B. H3O+ C. HCOO− D. OH−
Which species is the conjugate base of methanoic acid, HCOOH? A. HCOOH2+ B. HCOO− C. HCO3− D. CH3O−
In which compound does manganese have an oxidation state of +4? A. Mn(NO3)2 B. Mn2(SO4)3 C. Mn3(PO4)4 D. Mn3(PO4)5
In which compound does chromium have an oxidation state of +3? A. K2Cr2O7 B. Cr(NO3)2 C. Cr2(SO4)3 D. Cr3(PO4)2
Zinc reacts with an aqueous solution of ethanoic acid. Zn(s) + 2 CH3COOH(aq) → Zn(CH3COO)2(aq) + H2(g) Which combination shows the role of the acid and the gas formed? A. oxidizing agent, H2(g) B. oxidizing agent, CO2(g) C. reducing agent,…
Magnesium ribbon is added to aqueous ethanoic acid. Which combination gives the role of the acid and a product formed from it? A. Oxidizing agent, H2(g) B. Oxidizing agent, CO2(g) C. Reducing agent, H2(g) D. Reducing agent, CO2(g)
A voltaic cell is set up with the cell diagram and a salt bridge containing aqueous potassium nitrate. Which statements are correct while the cell operates? I. The mass of the silver electrode…