What is the atomic number of the yet-undiscovered element directly below francium (Fr) in the periodic table?

Calculate the amount of energy released when 2,064 g of water are cooled from 92 ˚C to 45˚C. The specific heat of water is 4.184.

How many kilojoules of heat energy are absorbed when 100.0 g of water are heated from 20.0°C to 30.0°C? (1) 4.18 kJ (3) 418 kJ (2) 41.8 kJ (4) 0.418 kJ

Which statement best describes London dispersion forces? A:repulsive intramolecular forces B:attractive intramolecular forces C:repulsive intermolecular forces D:attractive intermolecular forces

A certain reaction has an activation energy of 51.64 kj/mol. At what temperature Kelvin will the reaction be 5.50 times faster than it did at 343K?

Which region of the electromagnetic spectrum is used by doctors to view the skeletal structure of the human anatomy?

How does phosphorus enter the human body?

When a reaction occurs between atoms with ground state electron configuration 1s2 2s1 and 1s2 2s2 2p5 the predominant type of bond formed is

How does heat transfer takes place between any two systems?

Hydrate name of CaCl2 * 8 H2O

Calculate the heat evolved from a mixture of 14.1 l of sulfure dioxide