ANSWER ASAP Which of the following electronic transitions in the oxygen atom will result in light emission?
. A. ni = 1 ⟶ nf = 2
B. ni = 1 ⟶ nf = 3
C. ni = 3 ⟶ nf = 2
D. ni = 2 ⟶ nf = 3

How much heat is released upon converting one mole of steam (18.0 g) from 100.0 ∘c to water at 25.0 ∘c? show work and constants, trying to figure out how it works. only given the heat capacity for steam and water so try to only use that

*will mark you brainliest + 15 points ** why does the equilibrium of a system shift when the pressure is increased? a. to maximize the stress on the system b. to stop restoring equilibrium to the system c. to increase the total moles of gas in the system d. to decrease the total moles of gas in the system

Apiece of copper has a temperature of 75.6 0c. when the metal is placed in 100.0 grams of water at 19.1 0c, the temperature rises by 5.5 0c. what is the mass of the metal?