Makeup Unit 4 Test - Balance Eq and Types of Chem Rxn

What is a coefficient?

• The small number on the right of the chemical symbol.
• The large number to the left of a formula.

What is a product?

• What's left of the chemical reaction.
• The beginning formulas.

Tags

NGSS.HS-PS1-6

NGSS.HS-PS1-7

 Mg  +  ___ HCl  →   MgCl₂  +   H₂

• 1
• 2
• 3
• 4

Tags

NGSS.HS-PS1-1

PCl₅  +  ___ H₂O  →  ___ HCl  +   H₃PO₄

• 4, 5
• 1, 6
• 3, 8
• 2,2

Tags

NGSS.HS-PS1-7

PCl₅  +  ___ H₂O  →  ___ HCl  +   H₃PO₄

• 4, 5
• 1, 6
• 3, 8
• 2,2

Tags

NGSS.HS-PS1-2

In the equation,          2Mg + O₂ ---> 2MgO, which are the reactants?

• Mg and O
• MgO
• Mg and MgO
• O and MgO

Tags

NGSS.MS-PS1-1

In chemical reactions, the law of conservation of mass is......

• disobeyed
• not true
• obeyed
• used sometime

Tags

NGSS.HS-PS1-7

What is a chemical equation?

• A short way to show a chemical reaction using symbols
• A way to explain a chemical reaction using words

Tags

NGSS.HS-PS1-7

The blue numbers in the image below represent ________

• I don't know, and don't want to try
• coefficients
• subscripts
• none of the answers are correct

The red numbers in the image below represent ________

• subscripts
• coefficients
• I don't know, and don't want to try
• None of the answers are correct

Tags

NGSS.HS-PS1-7