Please Help Quick ASAP
Which example best shows conservation of resources?

leaving the lights on when leaving a room

using a new disposable plastic bag to carry groceries

let the water run while brushing your teeth

walking instead of driving a car to get to the library

Determine the reaction and balance the following equations urgent due in the morning

Which of the following units is not an official si unit? mole liter kilogram ampere

Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?