In the reaction 2H2 + O2 → __H2O, what coefficient should be placed in front of H2O to balance the reaction?

A-1

B-2

C-3

D - no coefficient is needed

A white solid can be purified from lemon juice. This solid tastes sour. When placed into water the solution conducts electricity and has a pH of 3.0. The solution turns litmus paper red.

A sample of glucose, CeH120e, contains 1.03 x 1025 atoms of carbon. How many atoms of hydrogen does it contain?

What type of Technology would you want to use to study the gas giant planets

Which are the reactants for mg (s) + o2 (g) = mgo (s)

If an atom of sodium has 11 protons, what is its approximate atomic mass?

Explain why a balloon filled with O2 at room temperature collapses when cooled in liquid nitrogen where as balloon filled with He does not

Which mixture can be separated by using the equipment shown below?

El agua de Mar es una mezcla homogenea o disolucion Y El agua corriente Y El aire Y LA lejia Y Los refrescos con gas Y El suero fisiologico Y Las monedas Y LA leche Y LA gelatina Y Los productos de higiene Y El merengue

The component which dissolves in a solution is called the ...

If this fossil is 65 million years old, what could this fossil suggest about organisms alive today? A. If it is similar to any two modern species, it could be a common ancestor of these species. B.