Sem 1 Exam Review - Chemistry

In a balanced chemical equation the number of each kind of atom in the product must equal

• number of each kind of atom in the reactant

• total number of atoms in the reactant

• at least the number of atoms in the reactant

• the number of products in the theoretical epicenter

Tags

NGSS.HS-PS1-7

A balance chemical equation must

• have at least 3 types of atoms

• have a compound

• satisfy the law of conservation of mass

• create less mass than was originally expected

Tags

NGSS.HS-PS1-7

In a chemical reaction energy is neither created or destroyed.

• Law of Conservation of Matter

• Law of Conservation of Mass

• Law of Conservation of Everything

• Law of Conservation of Energy

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

2 HCl + Mg --> MgCl₂ + H₂

• Single Replacement

• Synthesis

• Combustion

• Decomposition

Na₂ + Cl₂ --> 2 NaCl

• Single Replacement

• Synthesis

• Decomposition

• Combustion

KBr + AgNO₃ --> KNO₃ + AgBr

• Double Replacement

• Synthesis

• Decomposition

• Combustion

Balance this equation:

​ (a)   Fe + ​ (b)   O₂ --> ​ (c)   Fe₂O₃

• 4
• 3
• 2
• 1
• 0

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Number of C: ​ (a)  

Number of H: ​ (b)  

Number of O: ​ (c)  

• 4
• 6
• 8
• 2
• 3
• 1
• 5
• 7
• 9
• 10

Tags

NGSS.HS-LS1-6

NGSS.HS-LS1-7

NGSS.HS-LS2-5

​ ​ (a)   Fe₃O₄ + ​ (b)   H₂ --> ​ (c)   Fe + ​ (d)   H₂O

• 4
• 3
• 1
• 2
• 5
• 6
• 7
• 8

Tags

NGSS.HS-PS1-7

Is CH₄ a polar or non-polar molecule?

• Polar

• Non-polar

Tags

NGSS.HS-PS1-2