Which of the following compounds has exactly two atoms of hydrogen?

HCl

CH4

HNO3

H2O2

What are some chemical changes that happen at school, home, nature

How many moles of nitrogen are in 66.0 g of nitrous oxide?

Matter that is composed of two or more different elements chemically combined in a fixed proportion is classified as (1) a compound (3) a mixture (2) an isotope (4) a solution

What volume of a 6.84M sodium bromide solution would be needed to make 588mL of a 1.84m solution by dilution

If data are from a trusted source and the results are validated by multiple tests, the evidence supporting a scientific claim is

Which atom has a change in oxidation number of - 3 in the following redox reaction K2Cr2O7 + H2O + S - - > KOH + Cr2O3 + SO2

Why does fluorine have a higher electronegativity than lithium?

What mineral is this? Irregularly shaped, white with nonmetallic luster, the hardness of 2.5, shows cubic cleavage and dissolves easily in water.

The passage of the USA Patriot Act of 2001 and the creation of the Department of Homeland Security reflect the determination of the United States government to (1) search for weapons of mass destruction in South Asia (2) increase the globalization

Is it possible for 2 different elements to have the same atomic number