20 g of nh4cl is added to 13.9 g of water. calculate the molality of the solution.

It takes 47.0 j to raise the temperature of an 10.2 g piece of unknown metal from 13.0∘c to 24.6 ∘c. what is the specific heat for the metal? express your answer with the appropriate units.

A hydrocarbon with this formula c5h10: has a triple paired c-c bond has a double paired c-c bond is essentially inert is unstable and extremely reactive

Sound waves travel faster than light waves. A. True B. False

Which statements describe functions of DNA? Select three options.

Which change will always result in an increase in the avitational force between two objects? increasing the masses of the objects and increasing the distance between the objects decreasing the masses of the objects and decreasing the distance

How many grams of sodium ions are in na2so4?

Electron configuration for iron?

Explain how melting is considered endothermic

In the process of covalent bonding, atoms share electrons. This means that * a) Electrons from each atom are attracted to the nucleus of both atoms b) Protons and neutrons attract c) Atoms lose electrons and become ions d) Atoms gain electrons and

Give the full atomic symbol for an atom that has 30 neutrons and an atomic number of 25