Chemical Reactions DCA Review

The production of a slightly soluble solid compound in a double-displacement reaction results in the formation of a

• gas

• precipitate

• combustion reaction

• halogen

To balance a chemical equation, it is permissible to adjust the

• coefficients

• subscripts

• formulas of the products

• number of products

In a chemical equation, the symbol (aq) indicates that the substance is

• water

• dissolved in water

• an acid

• insoluble

• sodium hydroxide is a product.

• sodium is a product.

• water is a reactant.

• sodium hydroxide is a product and water is a reactant

Tags

NGSS.MS-PS1-2

Which of the following indicates that a chemical equation is balanced?

• The numbers of atoms of each element are the same on both sides of the equation.

• All of the coefficients are the same.

• The numbers of molecules on each side of the equation are equal.

• The sums of the coefficients on each side of the equation are equal.

Tags

NGSS.HS-PS1-7

From a complete and correctly written chemical equation, you can obtain the

• chemical formulas of the reactants and products.

• relative amounts of the reactants and products.

• physical states of the reactants and products.

• All of the answers are correct

To balance a chemical equation, you must

• adjust the subscripts.

• adjust the number of products.

• adjust the number of reactants.

• adjust the coefficients.

Tags

NGSS.HS-PS1-7

The formation of a solid product in a chemical reaction is represented by the symbol

• (aq).

• (g).

• (l).

• (s).

What symbol indicates a reversible reaction?

In the expression 3CO₂, the numbers 3 and 2 are, respectively,

• a subscript and a coefficient.

• a coefficient and a subscript.

• two subscripts.

• two coefficients.