The radioactive isotope tritium decays with a first-order rate constant k of 0.056 year-1. what fraction of the tritium initially in a sample is still present 30 years later?

Are atoms defined by the number of protons

What is the number of particles in one mole of a substance

Fusion reactions occur between what kinds of elements?

How does the oxidation state of O change in the following reaction? L (S) + NaOH (aq) → LiOH (aq) + Na (s)

Chlorine gas was used as a weapon, in the first major gas attack against the enemy, by this country in 1915. Name the country.

How many moles of carbon are in 7.87x10^7 carbon molecules?

The phases of the moon are caused by the changing positions of the Earth and the Moon in relation to the Sun. Which items could best be used to represent the Sun, the Earth, and the Moon in a model that shows the phases of the Moon? A.

Describe your observations of the original solutions. Describe your observations when the silver nitrate was added to the sodium chloride solution.

A gas occupies 18.5L at stp. what volume will it occupy at 735 torr and 57°c?

When two elements form two different compounds, the masses of element B that combine with 1 g of element A can be expressed as a ratio of small whole numbers.