What is the enthalpy for the reaction represented in the following energy diagram?

1. A sample of radon has a half-life of 15 hours. What fraction of the sample is left after 60 hours have passed?

Which of the following statements is true? Elements in the last period are radioactive. Atomic weight is the same as atomic mass. Elements in the same group have the same number of electron shells.

How does binomial nomenclature related to plants and animals?

How can it be deduced that metallic zinc and metallic lead displace hydrogen from strong acid, whereas metallic copper and silver do not?

The strongest intermolecular interactions between hydrogen fluoride (hf) molecules arise from

What is the molarity of a solution containing 5.0 moles of kcl in 2.0 l of solution?

Compare the electron configurations of hydrogen, lithium, and sodium. Why do you think these elements are grouped in the same family?

What is the theoretical yield of silver chloride?

Calculate the cell potential for the galvanic cell in which the reaction Fe (s) + Au 3 + (aq) - ⇀ ↽ - Fe 3 + (aq) + Au (s) occurs at 25 ∘ C, given that [ Fe 3 + ] = 0.00150 M and [ Au 3 + ] = 0.797 M.

Magnesium is lighter than other structural metals, so it is increasingly important in the design of more efficient vehicles.