Chemical formulas and Reactions

CH₂Cu₈ - How many Copper atoms are in this formula?

• 1

• 2

• 8

• 16

Tags

NGSS.MS-PS1-1

How many total atoms are in this formula? 3Zn₂O₃H

• 6

• 9

• 18

Tags

NGSS.MS-PS1-1

What is the coefficient for this formula? 9NaCl₂

• 9

• 2

• 1

• 11

Tags

NGSS.MS-PS1-1

This tells you the number of molecules you have of a substance

• coefficient

• subscript

• exponent

• chemical formula

Tags

NGSS.MS-PS1-1

This tells you how many atoms of an element you have in a chemical formula

• coefficient

• subscript

• chemical symbol

• atomic number

Tags

NGSS.MS-PS1-1

Is this equation balanced?

2H₂O yields H₂ + 2O₂

• Yes

• No

Tags

NGSS.MS-PS1-5

This equation is not balanced. Which element has more atoms on one side than the other?

2HCl + CaCO₃ yields CaCl + H₂O + CO₂

• Cl

• Ca

• H

• O

Tags

NGSS.MS-PS1-5

Which of the following lists all the elements that are present in a molecule of potassium carbonate, K₂CO₃ ?

• Arbon and Oxygen
  

• phosphate and calcium
• potassium, carbon, and oxygen
• phosphorus, oxygen, and calcium

Tags

NGSS.MS-PS1-1

The formula for glucose is C₆H₁₂O₆. How many elements does glucose contain?

• 1
• 3
• 24
• 432

Tags

NGSS.MS-PS1-1

A student mixes two solutions, planning to produce carbon dioxide. Which of the following is the BEST evidence that a chemical reaction is producing carbon dioxide?

• color change
• formation of a solid
• temperature change
• formation of bubbles

Tags

NGSS.MS-PS1-2