IG Chemistry-Competition 1

Front

What is the correct atom count for the reactant side of the chemical equation CH₄(g) + 2O₂(g) --> CO₂(g) + 2H₂O(l)?

Back

C=1, H=4, O=4

Front

What is the atomic number of Iron (Fe)?

Back

26

Front

What is the normal melting point of a substance that melts at 60°C?

Back

60°C

Front

What is the color of anhydrous (without water) copper sulfate?

Back

White

Front

What is the mixture separated using the apparatus shown in the question?

Back

aqueous copper(II) sulfate and copper

Front

Define atomic number.

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is the chemical formula for methane?

Back

CH₄

Front

What is the state of water at 100°C under normal atmospheric pressure?

Back

Water is in a gaseous state (steam) at 100°C.

Front

What is the significance of the coefficients in a balanced chemical equation?

Back

Coefficients indicate the number of molecules or moles of each reactant and product involved in the reaction.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.