Element X consists of two isotopes with masses of 62.9 and 64.9.

The relative atomic mass of the element is 63.6. The percentage

abundance of the lighter isotope is closest to -

Select one:

-65%

-55%

-35%

-45%

Ou encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution?

Is water an element compound or mixture

Salts are composed of ions that form a tightly packed and ordered network, which is called a crystal lattice, and it is held together by

Which of the following is not true about compounds? Compounds are combinations of elements that join in specific ratios. A specific compound always has the same mass ratio of its components. Elements can combine in any proportion to form a compound.

Which represents the greatest time frame in which a short-term environmental change can occur? A) in days. B) in minutes. C) over hundreds of years. D) over thousands of years.

58.5 million excess electrons are inside a closed surface. What is the net electric flux through the surface?.

Nitrogen monoxide and oxygen, both colorless gases, form a red-brown gas when mixed. Nitrogen monoxide and oxygen are called the

What quantity of heat is needed to raise the temperature of 5.0g of a substance from 20 c to 30 c if the specific heat?

Compare mechanical energy and thermal energy.

How many covalent bonds can each carbon atom form?