2024 Types of Matter and Chemical Reactions

Front

How many Mg atoms are in this compound? 6MgF₂

Back

6

Front

How many molecules are in this chemical formula? Options: 4 Molecules, 8 Molecules, 2 Molecules, 5 Molecules

Back

2 Molecules

Front

How many elements are in NaCl?

Back

2

Front

Iron (Fe) reacts with oxygen to form Iron Oxide (FeO). The properties of FeO are most likely...

Back

different from Iron or Oxygen.

Front

Which of these is a result of a physical change? Options: a solid formed from liquids, a new gas, a new chemical substance, a solution

Back

a solution

Front

The Law of Conservation of Mass states

Back

that matter cannot be created or destroyed and that the mass of the products must equal the mass of the reactants

Front

Does this equation show conservation of mass? 2HgO → 2Hg + O₂

Back

Yes

Front

In a chemical reaction, 4 grams of sodium must combine with how many grams of chlorine to produce 10 grams of table salt?

Back

6 grams

Front

Maria fills a bowl with 200 g of water and freezes it. What is the mass of the frozen water? Options: 50 g, 100 g, 200 g, 400 g

Back

200 g

Front

A chemical reaction takes place in a closed system. The mass of the reactants in the beginning of the reaction is 25g. What does the mass have to be in the end of the reaction in order to follow the law of conservation of mass?

Back

25g