Chem 1 Semester 2 2023

Which is the correct DA setup to answer this question:

How many moles are in 16.00 g of water?

Choose the coefficients needed to balance the following equation: 

Cl₂  +  KI  →  KCl  +  I₂

• 1, 2, 2, 1

• 1, 1, 1, 1

• 2, 1, 2, 1

• 2, 1, 1, 2

In what kind of reaction does a hydrocarbon react with oxygen to produce carbon dioxide and water?

• Combination

• Decomposition

• Double Replacement

• Hydrocarbon combustion

What type of reaction is this: Na  +  MgCl2  →  NaCl  +  Mg

• Combination

• Decomposition

• Single Replacement

• Double Replacement

In a chemical reaction, what is the relationship between the total mass of the reactants and the total mass of the products according to the law of conservation of mass?

• Mass is lost as a gas

• They are equal

• Mass is gained from the oxygen bonding

• There is no relationship

What would the formula for nitrogen be when nitrogen reacts with oxygen to produce dintirogen oxide?

• N

• N₂

• Ni

• N^3-

In a chemical equation, the symbol that takes the place of the words "reacts with" is a(n)

• arrow

• plus sign

• triangle

• coefficient

A substance that enters into a chemical reaction is called a(n) _____ .

• coefficient

• reactant

• product

• element

What type of reaction is the above reaction  2 Fe₂O₃ → 4 Fe  +  3 O₂   

• Combination

• Decomposition

• Single Replacement

• Double Replacement

What is the proper term for the 5 in front of oxygen in the following equation:

1 C₃H₈  +  5 O₂  →   3 CO₂  +  4 H₂O

• subscript

• exponent

• coefficient

• charge