Chemical Formulas Ionic and Polyatomic Formula Balancing Equation Polar and Non Polar

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?

• the product is doubled
• the product is half the mass of the reactants
• the mass is the same
• the mass changes depending on the reaction

Tags

NGSS.MS-PS1-5

How many elements are in C₆H₁₂O₆?

• 6
• 12
• 3
• 24

Tags

NGSS.MS-PS1-1

The red numbers in the image below represent ________.

• subscripts
• coefficients
• I don't know.
• None of the answers are correct.

Tags

NGSS.HS-PS1-7

The blue numbers in the image below represent ________.

• I don't know.
• coefficients
• subscripts
• None of the answers are correct.

Which are the reactants in the following reaction?
2Mg + O₂ ---> 2MgO 

• Mg and O
• MgO
• Mg and MgO
• O and MgO

Tags

NGSS.MS-PS1-1

In a chemical reaction, everything to the right of the arrow are called ______________.

• products
• yields
• molecules
• reactants

How many oxygens are in Al₂(SO₄)₃?

• 4
• 12
• 7
• 24

Tags

NGSS.MS-PS1-1

How many hydrogens are in 4H₂O?

• 6
• 8
• 2
• 4

Tags

NGSS.MS-PS1-1

Which of the following symbols is not a correct indication of the phase of a substance in a reaction? 

• (s)=solid
• (g)=grams
• (l)=liquid
• (aq)= aqueous

How many molecules of Carbon are in the following formula? 3C₂H₆

• 3
• 6
• 12
• 18

Tags

NGSS.MS-PS1-1