What is monochromatic light

What is the name of the theroy that sientists developed to explain the formation of the universe plate tectonic, big bang, continental drift or black hole

When 54.50 and 50.407 are divided, how many significant figure would you have?

Na+ion resembles Ne (Neon) atom. Give reason.

What mass of f2 is needed to produce 120. g of pf3 if the reaction has a 78.1% yield?

How did the development of the earliest idea about atoms differ from the later work of scientists?

Change of state may occur when?

During the combustion of 2.00 g of coal, the temperature of 500 g of water inside the calorimeter increased from 25.0°c to 43.7°c. the specific heat of water is 4.18 j/g·°c. how much heat did the reaction generate?

Catalysts are substances that increase the rate of reaction but can be recovered unchanged at the end of the reaction. Catalysts can be classified as either homogeneous (same state as reactants) or heterogeneous (different state than reactants).

How many molecules are there in 79g of Fe2O3?

Which of the following elements is an alkall metal?