Knowledge Check -- Chemical Formulas

How many elements are in C₆H₁₂O₆?

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-1

Which of the following is a compound?

• Co
• O₂
• C
• CO₂

Tags

NGSS.MS-PS1-1

Which of the following is NOT an element?

• H₂O
• H₂
• O₂
• Au

Tags

NGSS.MS-PS1-1

How many atoms are there TOTAL in:
H₂SO₄

• 6
• 5
• 7
• 3

Tags

NGSS.MS-PS1-1

How many neutrons are contained in a neutral atom of: 

• 7
• 14
• 8
• 9

Tags

NGSS.MS-PS1-1

Is being able to be malleable physical or chemical

• physical 
• chemical 
• ducktile 
• malleable

A researcher wants to experiment with an element that reacts like phosphorus (P) but has a greater atomic mass. Which element should the researcher select for the experiment?

• Nitrogen (N)
• Sulfur (S)
• Arsenic (As)
• Silicon (Si)

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

A scientist spilled a few drops of dilute hydrochloric acid (HCl) on a lab table. For safety purposes, the scientist sprinkled some baking soda (NaHCO3) onto the spill. Which observation would provide the best evidence that a chemical reaction occurred?

• The baking soda and hydrochloric acid combined, and bubbles formed
• The baking soda absorbed the hydrochloric acid.
• Some of the baking soda dissolved in the hydrochloric acid
• The hydrochloric acid evaporated, leaving only the baking soda.

Tags

NGSS.MS-PS1-2

*

• 12CO2 + H20 --light--> C6H12O6 + O2
• CO2 + 9H20 --light--> C6H12O6 + O2
• CO2 + H20 --light--> 3C6H12O6 + O2
• 6CO2 + 6H20 --light--> C6H12O6 + 6O2

Tags

NGSS.MS-PS1-5

NGSS.MS-LS1-6

NGSS.MS-LS1-7

Hay is made up of organic compounds. What are the main elements in many organic compounds?

• Helium, Carbon, Sodium
• Sodium, Hydrogen, Nitrogen
• Carbon, Hydrogen, Oxygen
• Radon, Oxygen, Helium

Tags

NGSS.MS-PS1-1