Chemical Reactions Assessment

WHAT ZONE ARE YOU IN?

• GREEN- HAPPY, CALM, PREPARED, FOCUSED

• YELLOW- SILLY, FRUSTRATED, WORRIED, SCARED

• BLUE- SICK, SAD, TIRED, BORED

• RED- MEAN, MAD, DISGUSTED, YELLING

The chemical formula for hydrogen peroxide is H₂O₂. Explain what the letters and numbers in the chemical formula represent.

• The H represents hydrogen

• The O represents oxygen

• he 2s indicate there are two atoms of hydrogen and two atoms of oxygen in each molecule

• The H represents helium

• The O represents the original substances in the equation

Tags

NGSS.MS-PS1-1

A chemical reaction combines the metal sodium (Na) and the gas chlorine (Cl₂) to form sodium chloride, commonly known as table salt (NaCl). Explain why the product has different properties from the reactants.

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NGSS.MS-PS1-2

NGSS.MS-PS1-1

Based on the equations, which statement is correct?

• MgO is a reactant in one of the chemical reactions.

• Na3PO4 is a product in one of the chemical reactions.

• A total of five oxygen atoms are involved in the first reaction.

• H3PO4 shows that three atoms of oxygen are involved in the reaction.

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NGSS.MS-PS1-5

NGSS.MS-PS1-2

NGSS.MS-PS1-1

Which of the following statements is true?

• Mass is lost when 2Mg and O2 become 2MgO.

• Because Mg and O2 are both elements, no bonds were broken during the formation of MgO.

• The chemical properties of Pb(NO3)2 and NaI differ from the chemical properties of PbI2 and NaNO3.

• The chemical properties of NaOH and Na3PO4 are similar, and the chemical properties of H3PO4 and H2O are similar.

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NGSS.MS-PS1-5

NGSS.MS-PS1-2

When paper is burned, the mass of the remaining ash is less than the mass of the original paper.Which statement best explains this result?

• The ash less volume than the paper

• Some of the matter is destroyed during the reaction

• The mass of the ash cannot be accurately determined

• Some of the products of the reaction were given off as a gas

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Ethane (C2H6) is one of many compounds that burn in oxygen to form carbon dioxide and water, as represented by the equation.

2C2H6 +7O2 --> 4CO2 + 6H20

Which substance is a product in this reaction?

• Carbon (C)

• Oxygen (O2)

• Water(H2O)

• Ethane (C2H6)

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NGSS.MS-PS1-2

NGSS.MS-PS1-1

Solid magnesium, Mg, reacts with oxygen gas, O2, to form the solid magnesium oxide, MgO. which is a balanced chemical equation for this reaction?

• Mg + O --> MgO

• Mg + O2 --> MgO2

• Mg + 2O --> 2MgO

• 2Mg + O2 --> 2MgO

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NGSS.MS-PS1-5

NGSS.MS-PS1-2

During photosynthesis, water and carbon dioxide react to form oxygen and glucose. Explain how the products differ from the reactants of photosynthesis.

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NGSS.MS-LS1-6

When coal is burned, sulfur is released into the air, where it reacts with oxygen to produce sulfur dioxide and sulfur trioxide. which of these is true of this process?

• The identity of each reactant remains the same

• Sulfur dioxide and sulfur trioxide are the reactants in this change

• The products have different chemical properties than those of the reactants

• The products contain more sulfur atoms and fewer oxygen atoms than the reactants.

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2