A. Tính khối lượng ( g ) của Nguyên tử sắt ( 26 proton 30 nơtron và 26 electron ) B. Tính tỷ khối lượng của electron trong nguyên tử sắc so với khối lượng của toàn nguyên tử

A100-watt light bulb radiates energy at a rate of 100 j/s. (the watt, a unit of power or energy over time, is defined as 1 j/s.) if all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?

Brainliesttt me asap! the below reaction can be categorized as more than one type of reaction. which reactions are these, and what are the types of reactions?

Predict whether the changes in enthalpy, entropy, and free energy will be positive or negative for the boiling of water, and explain your predictions. how does temperature affect the spontaneity of this process?