this is a titration question 

answer the following questions using the information provided below 

1. The moles of Cr₂O₇^2-(aq) that reacted, expressed in scientific notation, is a.bc x 10^-dmol. The values of a, b, c and d are 

2. The concentration of Sn²⁺(aq), expressed in scientific notation, is a.bc x 10^-d mol/L. The values of a, b, c and d are 

It has been determined that fluoride can prevent the decay of tooth enamel. Historically, tin(II) fluoride was added to toothpaste to help combat tooth decay. Titration analysis was used to determine the concentration of tin(II) fluoride in a NMmple of toothpaste. A 10.0 mL sample of tin(II) fluoride solution was acidified and titrated with 0.0100 mol/L potassium dichromate solution as represented by the following equation.

3Sn2+(aq)+Cr2O2−7(aq)+14H+(aq)→3Sn4+(aq)+2Cr3+(aq)+7H2O(l)

The following data was collected during the four trials.

IN AN EXPERIMENT TO STUDY THE SPONTANEITY OF REDOX REACTIONS, A STUDENT PLACED DIFFERENT METALS INTO FIVE SEPERATE TEST TUBES, EACH CONTAINING A DIFFERENT 1.0MOL/L SOLUTION, AS SHOWN BELOW. 

TEST TUBE 1- THE METAL IS Zn(s) in a solution of Fe(NO3)2(aq)

Test tube 2- the metal is Co(s) in a solution of Sn(NO3)2(aq)

test tube 3- the metal is Cu(s) in a solution of Cu(NO3)2(aq) 

tets tube 4- the metal is Au(s) in a solution of Cu(NO3)2(aq) 

test tube 5- the metal is Ag(s) in a solution of HNO3(aq) 

test tube 6- the metal is Ni(s) in a solution of AgNO3(aq)

for each test tube, determine which one is a spontaneous reaction and which one is not a spontaneous reaction. 

2. which of the entities will react spontaneously with Zn(s) but not with Cd(s) 

- Sn²⁺_(aq)

_- Mg²⁺_(aq)

- H2O(l)

- Cr³⁺_(aq)

 3. find the strongest SOA AND SRA

a solution of iron(II) chloride is mixed with an acidifed sodium nitrate 

b. solution of sodium hydroxide, potassium sulfite and chromium(II) nitrate are mixed. 

4. which of the following is an entity that will copper(II) ions and also oxidize metallic nickel

STRONG OXIDIZING AGENTS WILL HAVE STRONG AFFINITY FOR ELECTRONS AND TEND TO GAIN ELECTRONS 

IS THIS TRUE OR FALSE?

STRONG REDUCING AGENTS WILL HAVE STRONG AFFINITY FOR ELECTRONS AND TEND TO GAIN ELECTRONS 

IS THIS TRUE OR FALSE?

WEAK REDUCING AGENTS WILL HAVE A WEAK AFFINITY FOR ELECTRONS AND TEND TO LOSE ELECTRONS 

IS THIS TRUE OR FALSE?

Triangles ABC and DEF are both right triangles. Each has a hypotenuse length of 10 m. Is this enough information to conclude that the two triangles are congruent?

As the earth revolves around the sun, distant objects can be seen from different locations. This idea can be used to measure the distance between earth and nearby stars and is called stellar parallax. To see how this process works, consider the simplified scenario below. A distant object is observed on earth from location 1 and again six months later at location 2. The angle at both location 1 and 2 is 89.9°. How many astronomical units is the distant object from location 1?

The side length of the gazebo's base is the same as a side length of the outer surface of the gazebo's roof. If the roof is 1.5 m tall, what angle is formed at the top of each triangular section of the roof?

daphne is designing a poster for her band the sweet monsters she wants the letters to be slanted and wants the two words on separate lines she plans to draw a grid of parallel lines to use as a guide to do this A)using a straightedge and compass or a straightedge and protractor draw a parallel lines that daphne could use to guide each letter in her poster draw your guide so there are no right angles B)Explain how you know your parallel lines are parallel C) create the text for the poster

determine whether each of the following equations is a redox reaction or not

C6H12O6(s)→CO2(g)+C2H5OH(l)

NaOH(aq)+Al(s)+H2O(l)→H2(g)+NaAlO2(s)

SO2(g)+H2O(l)→H2SO3(aq)

2NaOH(aq)+Cl2(g)→NaCl(aq)+H2O(l)+NaClO(aq)

Na2CO3(aq)+2HCl(aq)→2NaCl(aq)+H2O(l)+CO2(g)

C6H12O6(s)+6O2(g)→6CO2(g)+6H2O(l)

Fe3O4(s)+CO(g)→3FeO(s)+CO2(g)

2Fe(OH)3(s)→Fe2O3(s)+3H2O(l)

  C 

assgin the oxidation numbers for each 

make sure to put the -/+ 

oxidation number       entity 

                                 I in I₂(s)

                                 S in HS^-(aq)

                                  Xe in XeF6(s)

Is there enough information to determine whether or not ABCD is a parallelogram? If so, explain whether or not it is a parallelogram