Personal Training Event 2(Chem2) 2022

Master chemical reactions! Practice counting atoms, identifying reactants/products & more.

Vocabulary Matching Match the correct word and definition. Subscript Shows how many atoms of each type of element are in a molecule. Coefficient Shows how many molecules are present. How many atoms of carbon are present in a molecule of glucose, C6H12O6? 1 6 12 24 How many atoms of oxygen are present in a molecule of vinegar, C2H4O2? 2 4 6 8 How many more oxygen atoms are there in C6H12O6 than in CO2? 2 4 6 12 How many total atoms are in a molecule of baking soda, NaHCO3 ? 4 6 12 24 How many hydrogen atoms are in H2Al(OH)3 ? 2 3 5 6 How many total oxygen atoms would be in TWO molecules of Aspirin, 2C9H8O4? 2 8 10 16 Look at the chemical equation below. Which substances are the reactants and which are the products? Click on the compound or element and select reactant or product. Reactants C3H8 5O2 Products 4H2O 3CO2 Look at the chemical equation below. Which substances are the reactants and which are the products? Click on the compound or element and select reactant or product.Mg + Cl2 --> MgCl2 Reactants Mg Cl2 Products MgCl2 Look at the equation below. What must be the mass of the product?Mg + Cl2 --> MgCl220g 30g ? 10g 20g 30g 50g Look at the equation below. What must be the mass of the O2?H2O2 --> H2O + O2 100g 70g + ? 10g 20g 30g 50g The Law of Conservation of Mass states that: matter is neither created nor destroyed during a chemical reaction the total energy of an isolated system remains constant conserving our resources is the only way to preserve our quality of life. Which of the following is a sign that a chemical reaction has occurred? change in shape formation of a gas melting dissolving Sulfur (S) reacts with oxygen (O) to form a gas known as sulfur dioxide (SO2). Which of the following best describes the properties of this gas? it has unique properties different from sulfur or oxygen it only has the same properties as oxygen it only has the same properties as sulfur it has no physical properties When Magnesium burns it becomes Magnesium Oxide. This is a _ change. Physical Chemical Coal contains carbon and other elements. Carbon dioxide forms when coal burns in the presence of oxygen. Which of these is the best evidence that a chemical reaction occurs when coal burns? The shape of the coal changes. Oxygen is present. A new substance is produced. Coal is made up of more than one element. How many total atoms are represented in the reactants on the equation below?C6H12O6 + 6O2 ---- 6CO2 + 6H2O 36 26 48 12 Some students added four different solid substances to separate beakers which contained water. Next, they stirred the mixtures for one minute. Which substance experienced a chemical reaction? Substance 1 absorbed water The color of substance 2 remained intact. Substance 3 sunk to the bottom, but the dye was floating at the top of the beaker. Substance 4 slowly released bubbles. Drag the statement to the correct column. Chemical Reaction A white solid forming after two liquid substances are mixed. A solid substance is dropped into a liquid, and became ice cold. Not a chemical reaction Butter melting on a warm toast. A liquid is heated and it starts to form bubbles. Match the chemical formula with the correct description. 2NaHCOH Has 4 elements and 10 total atoms 3NaClO Has3 elements and 9 total atoms 2Al + 3Cl2 ------ 2AlCl3154.2g ? 268.17If there was 154.2 g of the reactant aluminum (Al), and 268.17g of aluminum chloride (AlCl3) was produced, how much chlorine (Cl) was used to the nearest hundredths? 114.0 114.1 113.9 113.97