Chemistry Review

How many molecules in 13NaHCO₃ ?

• 13
• 4
• 78
• Answer not provided

Tags

NGSS.MS-PS1-1

How many elements in 4NaHCO₃ ?

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-1

How many total atoms in 4NaHCO₃ ?

• 24
• 4
• 16
• 15

Tags

NGSS.MS-PS1-1

Which is NOT an evidence of a chemical reaction?

• melting
• temperature change
• odor change
• production of a gas

Tags

NGSS.MS-PS1-2

Is this a chemical reaction?
H2O (liquid) + NaCl→ H2O (gas) + NaCl

• Yes
• No

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Is this a chemical reaction?
CH₄ + O₂ → CO₂ + H₂O

• No
• Yes

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

40 grams of Sodium were reacted with 40 grams of Chlorine.  How many grams of salt were produced?

• 80 grams
• 40 grams
• 20 grams
• 120 grams

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Is this equation balanced?
3H₂  + N₂ → 2NH₃

• Yes
• No

Tags

NGSS.MS-PS1-5

Does this equation obey the Law of the Conservation of Matter?
KMnO₄ + HCl → KCl + 2MnOH + 2H₂O

• Yes
• No

Tags

NGSS.MS-PS1-5

Which two elements will react in similar ways?

• Nitrogen and Phosphorus
• Nitrogen and Fluorine