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engineering
chemical engineering

Questions and Answers of Chemical Engineering

Suppose that the inflation rate in the United States is 5%, and the inflation rate in the United Kingdom is 8%. Use purchasing power parity to explain what is likely to happen to the value of the
What is the difference between a nominal exchange rate and a real exchange rate?
Why doesn’t purchasing power parity always hold?
If the euro appreciates, how will this affect your purchases of U.S. and German goods? Explain.
Suppose that you are planning to study abroad in Mexico for a semester. In planning for your trip, you calculate what you spend in a semester in the United States. Then you check to see what the
In each of the following cases, calculate the nominal exchange rate assuming purchasing power parity holds.a. A bottle of wine sells for $16 in the United States and €10 in France.b. A book sells
During the 1990s, strong U.S. economic growth contributed to the rise of stock markets’ values, making financial investment more attractive. At the same time, income growth spurred the demand for
Some countries with fixed exchange rates have attempted to overvalue their currencies; that is, they have tried to keep the exchange rate above the market rate.a. How can a country overvalue its
Give two examples of fixed exchange-rate systems and how they work.
What is a floating exchange-rate system? What is a managed float?
In a foreign-exchange market, who are the demanders of currency? In a foreign-exchange market, who are the suppliers of currency?
What factors shift the demand for a currency? What factors shift the supply of a currency?
Use a graph of the foreign-exchange market to explain the likely effect of the March 2011 tsunami in Japan on the relative value of the dollar and the yen.
The graph below shows the market for yuan:Suppose that the market for yuan and dollars is in equilibrium at point A. An increase in demand for Chinese exports causes the demand for yuan to shift to
Draw a graph of the market for euros in terms of U.S. dollars. Then show and explain the effect of each of the following changes:a. There is an increase in demand for U.S. exports.b. Stock markets in
How do imports and exports relate to the IS curve under a floating exchange-rate system?
How does a central bank’s inflation rate target relate to the shape and position of the MP curve under a floating exchange-rate system?
What are the effects on interest rates and output of expansionary fiscal policy in an open economy?
For each of the following cases, use the IS–MP model and the NCF curve to explain the effect on the output gap, the real interest rate, and net capital flows, assuming that exchange rates are
The graph below shows the IS€“MP model. Suppose that the economy is currently in equilibrium at point A.Suppose that the government pursues an expansionary fiscal policy, as shown by the
Consider the following statement: “Because monetary policy is more effective in an open economy, it is always a better choice than fiscal policy.” Do you agree with this statement? Briefly
In early April 2011, the European Central Bank (ECB) was expected to raise interest rates, while other major central banks held target interest rates constant. a. What effect would a rise in European
How do imports and exports relate to the IS curve under a fixed exchange-rate system?
How does a central bank’s inflation rate target relate to the shape and position of the MP curve under a fixed exchange-rate system?
What are the effects on interest rates and output of expansionary fiscal policy in an open economy with fixed exchange rates?
What are the effects on interest rates and output of expansionary monetary policy in an open economy with fixed exchange rates?
Repeat problem 5.5, but now assume that the exchange rate is fixed. How are your answers different? In problem 5.5 for each of the following cases, use the IS–MP model and the NCF curve to explain
The International Monetary Fund (IMF) makes loans of currency reserves to countries which are running out of reserves. a. How would a loan of currency reserves help a country maintain a fixed
Currency devaluation has similar effects to an expansionary fiscal policy.a. Use the IS–MP model to show the effect of currency devaluation.b. Why don’t countries with fixed exchange rates use
Unlike countries with currency problems, China has used a fixed exchange rate to keep the value of its currency below its market level. a. Why is it easier for a country to undervalue a currency
Why is exchange-rate stability important?
The United States has chosen to have free capital mobility and monetary policy independence. Does this mean that the value of the dollar is not stable? Briefly explain.
China has chosen to have exchange-rate stability and monetary policy independence, although the yuan may be allowed to float freely in the near future. a. What are the advantages to China having a
In the wake of the Japanese earthquake and tsunami in March 2011, the value of the yen increased sharply. According to the Economist: “The Bank of Japan tried to counteract that process, easing
What are the benefits of monetary policy independence?
Why are free capital flows desirable?
What is the policy trilemma?
A fixed exchange rate creates exchange-rate stability. What is the primary disadvantage of a fixed exchange rate?
Why would a country want to institute capital controls?
Because the Fed is not constrained by a fixed exchange rate, it is free to set monetary policy without concerns about the effect on the value of the dollar. a. How would the Fed’s actions during
Suppose that a country has a fixed exchange rate and no capital controls. Due to a political crisis, projections for economic growth in coming years are revised sharply downward. As a result of the
Capital flows can cause problems for exchange-rate stability. a. Why do countries allow the free movement of capital? b. Are some countries more likely to allow the free movement of capital than
How many molecules of H2 are needed to react with 29 molecules of N2 to make ammonia if the balanced chemical equation is N2 + 3H2 → 2NH3?
How many moles of Al2O3 will be produced when 23.9 g of H2O are reacted according to this chemical equation?2AlCl3 + 3H2O(ℓ) ( Al2O3 + 6HCl(g)
How many grams of N2 are needed to produce 2.17 mol of NH3 when reacted according to this chemical equation?N2(g) + 3H2(g) ( 2NH3(g)
What mass of H2 will be produced when 122 g of Zn are reacted?Zn(s) + 2HCl(aq) ( ZnCl2(aq) + H2(g)
A synthesis produced 2.05 g of NH3 from 16.5 g of N2. What is the theoretical yield and the percent yield?N2(g) + 3H2(g) ( 2NH3(g)
Given the initial amounts listed, what is the limiting reagent, and what is the mass of the leftover reagent?
How many molecules of Fe2(SO4)3 can you make from 777 atoms of S?
How many molecules are present in 4.61 × 10−2 mol of O2?
What is the molar mass of AgNO3?
What is the mass of 33.7 mol of H2O?
How many moles are present in 35.6 g of H2SO4 (molar mass = 98.08 g/mol)?
If the density of benzene, C6H6, is 0.879 g/mL, how many moles are present in 17.9 mL of benzene?
Interpret this balanced chemical equation in terms of moles.N2 + 3H2 ( 2NH3
Using the above equation, how many moles of H2O are produced when 154 mol of O2 react?2C4H10(g) + 13O2 ( 8CO2(g) + 10H2O(ℓ)
Think back to the pound cake recipe. What possible conversion factors can you construct relating the components of the recipe?
For the balanced chemical equation CuO(s) + H2S(g) ( CuS + H2O(ℓ) how many molecules of CuS are formed if 9,044 atoms of H react?
For the balanced chemical equation Fe2O3(s) + 3SO3(g) ( Fe2(SO4)3 suppose we need to make 145,000 molecules of Fe2(SO4)3. How many molecules of SO3 do we need?
One way to make sulfur hexafluoride is to react thioformaldehyde, CH2S, with elemental fluorine:CH2S + 6F2 ( CF4 + 2HF + SF6If 45,750 molecules of SF6 are needed, how many molecules of F2 are
Construct the three independent conversion factors possible for these two reactions:a. 2H2 + O2 ( 2H2Ob. H2 + O2 ( H2O2Why are the ratios between H2 and O2 different?
Construct the three independent conversion factors possible for these two reactions:a. 2Na + Cl2 ( 2NaClb. 4Na + 2Cl2 ( 4NaClWhat similarities, if any, exist in the conversion factors from these two
Think back to the pancake recipe. What possible conversion factors can you construct relating the components of the recipe?
What are all the conversion factors that can be constructed from the balanced chemical reaction 2H2(g) + O2(g) ( 2H2O(ℓ)?
What are all the conversion factors that can be constructed from the balanced chemical reaction N2(g) + 3H2(g) ( 2NH3(g)?
Given the chemical equationNa(s) + H2O(ℓ) ( NaOH(aq) + H2(g)a. Balance the equation.b. How many molecules of H2 are produced when 332 atoms of Na react?
Given the chemical equationS(s) + O2(g) ( SO3(g)a. Balance the equation.b. How many molecules of O2 are needed when 38 atoms of S react?
For the balanced chemical equation 6H+(aq) + 2MnO4−(aq) + 5H2O2(ℓ) ( 2Mn2+(aq) + 5O2(g) + 8H2O(ℓ) how many molecules of H2O are produced when 75 molecules of H2O2 react?
For the balanced chemical reaction 2C6H6(ℓ) + 15O2(g) ( 12CO2(g) + 6H2O(ℓ) how many molecules of CO2 are produced when 56 molecules of C6H6 react?
Given the balanced chemical equation Fe2O3(s) + 3SO3(g) ( Fe2(SO4)3 how many molecules of Fe2(SO4)3 are produced if 321 atoms of S are reacted?
How many atoms are present in 4.55 mol of Fe?
Determine the molar mass of each substance. a. Cl2 b. SeCl2 c. Ca(C2H3O2)2
Determine the molar mass of each substance. a. Al b. Al2O3 c. CoCl3
Determine the molar mass of each substance. a. O3 b. NaI c. C12H22O11
What is the mass of 4.44 mol of Rb?
What is the mass of 0.311 mol of Xe?
What is the mass of 12.34 mol of Al2(SO4)3?
What is the mass of 0.0656 mol of PbCl2?
How many moles are present in 45.6 g of CO?
How many moles are present in 0.00339 g of LiF?
How many moles are present in 1.223 g of SF6?
How many atoms are present in 0.0665 mol of K?
How many moles are present in 48.8 g of BaCO3?
How many moles are present in 54.8 mL of mercury if the density of mercury is 13.6 g/mL?
How many moles are present in 56.83 mL of O2 if the density of O2 is 0.00133 g/mL?
How many molecules are present in 2.509 mol of H2S?
How many molecules are present in 0.336 mol of acetylene (C2H2)?
How many moles are present in 3.55 × 1024 Pb atoms?
How many moles are present in 2.09 × 1022 Ti atoms?
How many moles are present in 1.00 × 1023 PF3 molecules?
How many moles are present in 5.52 × 1025 penicillin molecules?
Determine the molar mass of each substance. a. Si b. SiH4 c. K2O
For the balanced chemical equationAl(s) + 3Ag+(aq) ( Al3+(aq) + 3Ag(s)how many moles of Ag are produced when 0.661 mol of Al are reacted?
For the balanced chemical reaction4NH3(g) + 5O2(g) ( 4NO(g) + 6H2O(ℓ)how many moles of H2O are produced when 0.669 mol of NH3 react?
For the balanced chemical reaction4NaOH(aq) + 2S(s) + 3O2(g) ( 2Na2SO4(aq) + 2H2O(ℓ)how many moles of Na2SO4 are formed when 1.22 mol of O2 react?
For the balanced chemical reaction4KO2(s) + 2CO2(g) ( 2K2CO3(s) + 3O2(g)determine the number of moles of both products formed when 6.88 mol of KO2 react.
For the balanced chemical reaction2AlCl3 + 3H2O(ℓ) ( Al2O3 + 6HCl(g)Determine the number of moles of both products formed when 0.0552 mol of AlCl3 react.
Express in mole terms what this chemical equation means. Na2CO3 + 2HCl ( 2NaCl + H2O + CO2
How many molecules of each substance are involved in the equation in Exercise 1 if it is interpreted in terms of moles?
How many molecules of each substance are involved in the equation in Exercise 2 if it is interpreted in terms of moles?

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