Science Starter Counting Atoms #1

How many Hydrogen are in 4H₂O?

• 6
• 8
• 2
• 4

Tags

NGSS.MS-PS1-1

How many Oxygen are in H₂O?

• 1
• 2
• 0
• 4

Tags

NGSS.MS-PS1-1

2H₂ + O₂ ----> 2H₂O What is the product?

• ------>
• 2H₂O
• 2H₂+ O₂

Tags

NGSS.MS-PS1-5

2H₂ + O₂ --------> 2H₂O What  are the reactants?

• ----->
• 2H₂O
• 2H₂ +O₂

Tags

NGSS.MS-PS1-1

How many O's are in Al₂(SO₄)₃

• 4
• 12
• 7
• 24

Tags

NGSS.MS-PS1-1

A subscript is the small number below a(n) ________ that tells the number of _______ of that element.

• element symbol; atoms
• atom; element symbol
• subscript; protons
• compound; elements

What does the subscript in a chemical formula tell you?

• How many molecules are present

• How many atoms are present

• How many elements are present

• How many neutrons are present

Tags

NGSS.MS-PS1-1

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.MS-PS1-1

Which equation obeys the law of conservation of mass? If you need a hit for this I would check your "slides" folder for the slide about the law of conservation

• H₂ + O₂ ------>  H₂0
• C + 2H₂ ---->  CH₄
• 2Fe₂O₃  ------> 2O₂ + 4Fe

Tags

NGSS.MS-PS1-5