All atoms of the same element:

A. have the same number of atoms

B. have the same number of electrons

C. have the same number of protons

D. have the same number of neutrons

Given the reaction at 101.3 kilopascals and 298 K:hydrogen gas + iodine gas → hydrogen iodide gas This reaction is classified as (1) endothermic, because heat is absorbed (2) endothermic, because heat is released (3) exothermic, because heat is

How many moles of H2 would occupy 45.6 liters at 10.0 C and 1.25 ATM

The rate at which a substance evaporates is called what?

The electron configuration notation for the element with atomic number 11 is

List two properties of mixtures

Describe the difference between a monoprotic acid and a triprotic acid. How does a triprotic acid generate hydrogen ions?

Which of the following do scientists use to form a hypothesis?.

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.