Which of these elements is a halogen? magnesium sodium bromine calcium

A single atom of platinum has a mass of 3.25 x 10^-22 g. What is the mass of 6.0 x 10^23 platinum atoms?

What are some true statements about light

Ethylene (C2H4) burns in oxygen to produce carbon dioxide and water. What is the correct form of the balanced chemical equation that describes this reaction?

Which of these statements best explains why pure water has a pH of 7? Pure water contains only H2O molecules, but pH is based on the concentration of H3O + ions. Each molecule of water can dissociate to form 7 H3O + ions.

A galaxy type that is spherical or oval in shape

Object a has a mass of 500g and a density of 5.00 g/cm3 object b has a mads of 650. g and a density of6.5 g/cm3 which object would displace the most liquid? Explain

When balancing a chemical equation, the number of h atoms in 2 ch4 is eight?

What would be the total mass of the products of a reaction in which 25 grams of table salt decomposes into the elements sodium and chlorine?

The nucleus of a Helium atom has a charge equal to twice the proton's charge. Let FN denote the magnitude of the force the Helium nucleus exerts on one of the electrons in a Helium atom, and let Fe denote the magnitude of the force one electron in

What can you say about the past four decades?