Chemistry Semester 1 Practice Final (minus mole)

Front

How many Hydrogen atoms are in 4H₂O?

Back

8

Front

What is the formula for sodium phosphate?

Back

Na₃PO₄

Front

What is the formula for calculating density?

Back

Density = \frac{mass}{volume}

Front

What is the density of a block measuring 2 cm x 2 cm x 5 cm with a mass of 54 grams?

Back

2.7 g/cm³

Front

How is a chemical change different from a physical change?

Back

A chemical change creates a new substance.

Front

What type of reaction is represented by PbCl₂ + AgNO₃ → Pb(NO₃)₂ + AgCl?

Back

Double Replacement

Front

What is the definition of a chemical reaction?

Back

A process that leads to the transformation of one set of chemical substances to another.

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.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed.

Front

What is the pH scale used for?

Back

To measure the acidity or basicity of a solution.