LOCOM

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

• ------>
• 2H₂O
• 2H₂+ O₂

Tags

NGSS.MS-PS1-2

What is the part of the chemical equation in green called? 
Fe + S --> FeS

• products
• reactants
• yield
• chemical formula

How many Sodium atoms are in 6NaCl?

• 1

• 12

• 6

Tags

NGSS.MS-PS1-1

How many elements are present in this compound? (Careful!)

Mg₂As₃COHNi₂

• 2

• 4

• 6

• 10

Tags

NGSS.MS-PS1-1

5 N₂O represents the laughing gas you might have at the dentist. How many atoms of oxygen are present here?

• 10

• 2

• 7

• 5

Tags

NGSS.MS-PS1-1

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

How many Hydrogen atoms are in 4H₂O?

• 6

• 8

• 2

• 4

Tags

NGSS.MS-PS1-1

The law of conservation of mass states that 

• matter is created
• matter is destroyed
• matter is neither created nor destroyed
• matter does not change

Tags

NGSS.MS-PS1-5

In a reaction A + B ----> C, reactant A has 5g and product C has 9g. How many grams should reactant B have?

• 4g

• 5g

• 9g

• 14g

Tags

NGSS.MS-PS1-5

Matter can not be created nor destroyed: it can only be

• Destroyed a little bit
• Invisible
• Transformed, changed
• None of the above

Tags

NGSS.MS-PS1-5