from the equation 2PbO + C = 2Pb + CO2, detemine which one is reactant is oxidised and which is reduced.​

Which statement accurately describes the relationship between air pressure, air density, or altitude? as altitude increases, pressure increases.as altitude increases, air density increases.air pressure and density are lowest at sea level.denser air exerts more pressure than less dense air.

7. what temperature is need to just dissolve 50 g of nh4cl in 75 g of water? '

Needthe meter is the standard unit for: 1) height 2) length 3) weight 4) mass