CHEM Unit 5 Review Sp2024

In chemical reactions, what does the principle of conservation of mass mean?

• Matter is not created or destroyed.
• The total mass of the reactants is greater than the total mass of the products.
• The total mass of the reactants is less than the total mass of the products.
• Matter is not changed.
  

Tags

NGSS.HS-PS1-7

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?

• the product is doubled
• the product is half the mass of the reactants
• the mass is the same
• the mass changes depending on the reaction

Tags

NGSS.HS-PS1-7

What is the left part of a chemical equation called?
2H_{2 +} O₂ --> 2H₂O

• Reactants
• Products 
• Yields 
• Chemical Equation 

What is the right part of a chemical equation called...
2H_{2 +} O₂ --> 2H₂O

• Reactants
• Products 
• Yields 
• Chemical Equation 

Tags

NGSS.MS-PS1-5

Arrow in equation means

• product

• reactant

• yield

A group of chemical symbols and numbers to show number of atoms of each element in a molecule

• reactant

• Chemical Formula

• product

Tags

NGSS.MS-PS1-1

Number IN FRONT of reactants or products

• product

• reactant

• coefficient

• subscript

Number BELOW on an element

• product

• reactant

• subscript

• coefficient

a series of symbols and formulas that represents a chemical reaction

• reactant

• product

• Chemical equation

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

A chemical reaction that absorbs heat

• Single replacement
• Exothermic
• Endothermic
• Decomposition

Tags

NGSS.HS-PS1-4