Vivian Ngo

Given the following reaction, 2SO_2(g) + O_2(g) = 2SO_3, what will cause the reaction to proceed backwards?

A) increasing the volume of the reaction vessel

B) adding SO_3

C) removing O_2

D) all of the above

E) none of the above

For the rate law, rate=k[A][B]^2, by what factor will the rate decrease if the concentration of B is halved?

I recently just got scammed out of a good amount of money, however it is still only pending on my Chase account. I was wondering how I can cancel the transaction?

Ammonium phosphate

NH43PO4

is an important ingredient in many fertilizers. It can be made by reacting phosphoric acid

H3PO4

with ammonia

NH3.

What mass of ammonium phosphate is produced by the reaction of

6.20g of phosphoric acid?

Round your answer to

3

significant digits.

Driving along a crowded freeway, you notice that it takes a time t to go from one mile marker to the next. When you increase your speed by 7.3 mi/h , the time to go one mile decreases by 12 s.

What was your original speed in MPH?

Discuss some of the events (at least three) that helped to weaken the

power of the Medieval Church and the papacy from the 13th to the 15th

centuries.

(The Great Famine; The Black Death; The Hundred

Years War; The Peasants’ Revolt; The Great Schism.)

The term “Dark Ages” has often been applied to the Middle Ages. Do you

agree or disagree with this characterization? Include 3 points/examples please!

When 29.5 mL of 0.675 M H2SO4 is added to 29.5 mL of 1.35 M KOH in a coffee-cup calorimeter at 23.50°C, the temperature rises to 30.17°C. Calculate ΔH of this reaction. (Assume the total volume is the sum of the volumes and the density and specific heat capacity of the solution are the same as for water.)

a) ΔH per mole of H2SO4 reacted in kJ/mol

b)ΔH per mole of KOH reacted in kJ/mol

Consider the following balanced thermochemical equation, a reaction sometimes used for H2S production.

1/8 S8(s) + H2(g) → H2S(g)

ΔH = −20.2 kJ

1) Endothermic or exothermic reaction?

2) What is ΔH for the reverse reaction?

3) What is ΔH when 1.7 mol of S8 reacts?

4) What is ΔH when 20.9 g of S8 reacts?

Write the balanced reaction for the dissolution of each salt in water, including physical states. The convention is to leave water out of the equation, and simply write the reactant as the solid ionic compound and the product as ions in aqueous solution.

ammonium nitrate

calcium chloride

magnesium sulfate

sodium acetate

sodium carbonate

sodium chloride

sodium nitrate

magnesium carbonate

How did the Western European kingdoms that inherited the regions and people once ruled by Rome use Roman traditions, practices and institutions for their own development? Discuss at least three traditions, practices or institutions

What causes brought about the downfall of the Western Roman Empire in the 5th century? Discuss and analyze in detail at least three.

In what ways (positive and negative) did the acquisition of an empire affect the Romans on a social, political and economic level? Discuss at least three significant changes brought about by the acquisition of an empire

Oxalic acid (H2C2O4) found in dark leafy, green vegetables such as spinach, can inhibit iron absorption in the body. To determine the concentration of oxalic acid in a food, one can titrate a sample with a permanganate solution, which changes color on reaching the equivalence point. If one cup of spinach contains 180 mg of oxalic acid, how many milliliters of 0.0100 M permanganate solution would be required to reach the equivalence point? The balanced equation is given here.

HCO(aq)+MnO (aq)⎯⎯→2CO(g)+Mn (aq) 22442

(a) Sn(s) + 2 H+(aq) → Sn2+(aq) + H2(g)

(b) 2 H+(aq) + H2O2(aq) + 2 Fe2+(aq) → 2 Fe3+(aq) + 2 H2O(l)

(c) 8 H+(aq) + Cr2O72−(aq) + 3SO32−(aq) → 2 Cr3+(aq) + 3 SO42−(aq) + 4 H2O(l)

(d) 8 H+(aq) + 6 Cl−(aq) + Sn(s) + 4 NO3−(aq) → SnCl62−(aq) + 4 NO2(g) + 4 H2O(l)

(e) 8 NH3(g) + 6 NO2(g) → 7 N2(g) + 12 H2O(l)

Can someone help me with Chemistry please!

Calculate [H3O+] in a solution that is at 25°C and has [OH - ] = 6.30 10-5 M

Tomorrow is my first day taking their behind the wheel training. If anyone's taken their behind the wheel course before, do you mind giving me some details?? Thanks!

Tomorrow I am going to the DMV to take my written test to obtain a permit. I reside in California by the way. It is first time ever going to the DMV so I do not know what to expect. Can someone please share with me their experience with going to the DMV to take their permit test? When I first walk in where do I go? How long will I have to wait? Where will the testing take place? If I pass will they take a picture and will I receive my permit on the spot? Thank you!