5.12 unit chemical reactions

Which action defines a double-displacement reaction?

formation of a precipitate

What does the law of conservation of mass say?

he mass of the products in a chemical reaction is equal to the mass of the reactants

All single-displacement reactions can be classified as another type of reaction as well. What type of reaction is that?

redox

2H2O+2K(s)→2KOH(l)+2H2(g) is an example of which type of reaction?

single-displacement

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!!!!!!!!!!!!!!!

What is the balanced form of the equation C2H6+O2→CO2+H2O

2C2H6+7O2→4CO2+6H2O

The equation 2NaNO3+CaCl2→2NaCl+Ca(NO3)2 is balanced. How many atoms of sodium (Na) are there on either side of the equation?

two

Which equation is balanced?

4P+5O2→2P2O5

When cadmium (Cd) is mixed with hydrochloric acid (HCl), a single-displacement reaction occurs. What will be the product or products?

CdCl2+H2

Why does the reaction H2O+Cu→no reaction not proceed to a product?

Copper has a lower activity than hydrogen and cannot replace it

Which statement about decomposition reactions is true?

Decomposition reactions are essentially the opposite of synthesis reactions

What is not true about most combustion reactions?

Elemental carbon is a product.

Which sentence best describes why MnSO4→MnO+SO3 is not a synthesis reaction?

The reaction has more than one product

Which phrase is the best description of a redox reaction?

a reaction in which the exchange of electrons (or oxygen) occurs a reaction in which two new products are created - no response given

Carbon and oxygen combine to form carbon dioxide. What are the products, or what is the product, in this chemical reaction?

carbon dioxide

Methane burns in oxygen to yield carbon dioxide and water. The chemical formula for this reaction is CH4+2O2→CO2+2H2O. What is the product, or what are the products, of this reaction?

carbon dioxide and water

MnSO4→MnO+SO3 is not a synthesis reaction. What type of reaction is it?

decomposition

A reaction in which two ions switch places is which type of reaction?

double-displacement

Solid iron sulfide combines with aqueous hydrogen chloride to form hydrogen sulfide gas and aqueous iron chloride. Which type of chemical reaction is this an example of?

double-displacement

Hydrogen, when combined with nitrogen in a chemical reaction, forms ammonia. Which type of chemical reaction is this an example of?

synthesis

What type of chemical reaction is 4Fe+3O2→2Fe2O3?

synthesis