How many oxygen atoms and are present in this water molecule 2H2O?

(note * the number 2 after H is a subscript)

Neon is a gas made up of one type of atom. Which term best describes neon? A) molecule B) element C) compound D) mixture

The valence shells of alkaline earth metals generally possess more electrons than do the alkali metals. True False

When the equation NH₄OH + H₂SO₄ - --> (NH₄) ₂SO₄ + H₂O is balanced, a term in the balanced equation is A. 2H₂O B. 2H₂SO₄ C. 2 (NH₄) ₂SO₄ D. NH₄OH

A sample that cannot be seperated into 2 or more substances by physical means is

The reaction of an organic acid with an alcohol, in organic solvent, to produce an ester and water is commonly done in the pharmaceutical industry. This reaction is catalyzed by strong acid (usually H2SO4).

Which societal problem can be solved, in part, by scientists identifying areas of high biodiversity? A. reducing the amount of pollution B. finding affordable housing C. protecting the environment D. providing access to clean water

Brianna wanted to compare the densities of two different solids of the same size 6cm3 (same volume) to see which one was more dense. Solid A had a mass of 2 grams and Solid B had a mass of 0.5 grams.

Which type of bond is present within a water molecule

Every oxygen atom has 8 electrons. what can you learn from the electron configuration of oxygen

If there is a loss of 5.63 x 10 - 7 kg of mass in a nuclear reaction, how many joules of energy would be released? Recall that C equals 3 times 108 m / s.