In the equation,          2Mg + O₂ ---> 2MgO, which are the reactants?

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

Tags

NGSS.MS-PS1-5

What is the right part of a chemical equation called...

H_{2 +} O₂ --> H₂O

• Reactants

• Products

• Yields

• Chemical Equation

Balance this equation...

H₂ + Cl₂ --> HCl

• It is balanced

• 3H₂ + Cl_{2 -->} 6H₂Cl

• H₂ + Cl₂ --> 2HCl

Tags

NGSS.MS-PS1-5

Balance this equation...

HgO --> Hg + O₂

• It is balanced

• 2HgO --> Hg + O₂

• 2HgO --> 2Hg + O₂

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What type of chemical reaction is this one?

N₂O₅ + H₂O ---> 2HNO₃

• Decomposition

• Combustion

• Synthesis

• Single Replacement

Which of the following is an example of synthesis?

• 2Na + Br₂ → 2NaBr

• KClO₃ → KCl + O₂

• HgO + Cl₂ → HgCl + O₂

• Cl₂ + NaBr → NaCl + Br₂

Tags

NGSS.MS-PS1-1

A decomposition reaction can be represented as _____________________.

• AB  → A + B
• A + B → AB
• AB + CD → AC + BD
• A + BC → B + AC

This chemical equation below is an example of what type of reaction?

2MgO → 2Mg + O₂

• decomposition reaction

• synthesis reaction

• combustion reaction

• Marvin the Martian reaction

How many total atoms are in this chemical formula: (NH₄)₂SO₄

• 12

• 15

• 4

• 10

Tags

NGSS.MS-PS1-1

How many O's are in Al₂(SO₄)₃

• 4

• 12

• 7

• 24

Tags

NGSS.MS-PS1-1