chem ch 8 ab

You mix solution A with solution B in a beaker. Which of the following observations does not help you prove that a chemical reaction has occured?

Solution A, solution B, and the mixture are all yellow

In the reaction described by the word equation: sodium+water -> sodium hydroxide+hydrogen gas

Both a and c

Which of the following indicates that a chemical equation is balanced

The number of atoms of each element are the same on both sides of the equation

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

All of the above

To balance a chemical equation, you must

adjust the coefficients

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

s

What symbol indicates a reversible reaction

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

a coefficient and a subscript

What is the total number of molecules that is represented by the following chemical equation: NH4NO2 -> N2+2H2O

4

Which equation below violates the law of conservation of mass?

KCl+Br-> KBr +Cl2

Which of the following equation represents the balanced equation for the reaction of iron and oxygen?

4Fe +3O2->2Fe2O3

Which coefficents correctly balance the formula equation below: KClO3 -> KCl(s)+O2(g)

2,2,3

Which equation is not balanced?

2H2+O2->H2O

In which type of reaction do two or more compounds react to form one product

synthesis

Which of the following is true regarding single displacement reactions?

one element replaces another in a compound

Which of the following is true regarding double displacement reaction?

all of the above

A mixture of propane and oxygen react to form carbon dioxide and water. What type of chemical reaction is this

combustion

What type of chemical reaction does the following chemical equation represent: 2Hcl(aq)+Cr(s)->H2(g)+CrCl2(aq)

single displacement

Calcium carbonate reacts to form calcium oxide and carbon dioxide. What type of reaction is this

decomposition

What type of chemical reaction is represented by the following word equation: iron +oxygen-> iron(II) oxide

synthesis

Metal X replaces the ions of metal Y from solution, but it cannot replace the ions o metal Z from solution. The order these metals should have in the activity series (from top to bottom) is

z,x,y

In a single displacement reaction, an element in the activity series most likely can replace any element

below it on the list

the activity series helps to predict

whether or not a specific chemical reaction is possible

if calcium is listed above magnesium in the activity series, and magnesium is listed above zinc, which of the following reactions is possible?

Ca(s)+MgCl2(aq)->

You have an unknown metal X. You conduct two experiments. Which of the following statments is a logical conclusion based on the experiments data?

the unknown metal is higher on the activity series than zinc, but below sodium

Calcium carbonate reacts to form calcium oxide and carbon dioxide. What type of reaction is this

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