Is MgF2 a pure substance?

Assuming the amount of gas remains the same, what happens to the pressure if the temperature increases and volume decrease?

N writing a chemical equation that produces hydrogen gas, the correct representation of hydrogen gas is

Valence electrons are: O a. Electrons that have been lost in an atom O b. Electrons in the nucleus of an atom O c. electrons in the outer-most shell of an atom O d. electrons in the inner-most shell of an atom

Two of the reactions in the "Copper Cycle" are classified as oxidation-reduction ("'redox") reactions. Identify the two reactions, and identify the oxidizing agent and the reducing agent in each.

The embryo refers to an undeveloped animal or plant. True or false

The molecules in a solid object A. flow freely around each other B. vibrate slowly C. are completely still all the time

How many moles of water can be obtained from the reaction of 4 moles of O2?

A solid white substance A is heated strongly in the absence of air. It decomposes to form a new white substance B and a gas C. The gas has exactly the same properties as the product obtained when carbon is burned in an excess of oxygen.

C). If 0.5 mole of oxygen (0,) reacted with hydrogen (H2), how many mole of water (H, 0) was produced from the reaction?

A cube has a depth of 10 cm. What is the volume of the cube? Or What is depth?