Chemistry concepts and calculations

A Web site on fireworks provides directions for preparing potassium nitrate, KNO

A Web site on fireworks provides directions for preparing potassium nitrate, KNO3, by using potassium carbonate and ammonium nitrate according to the following equation:          …

A Which S_N 2 reaction in each pair is faster? b. Draw the products of each S_N

A Which S_N 2 reaction in each pair is faster? b. Draw the products of each S_N 2 reaction and indicate the stereochemistry where appropriate. Consider the following S_N 1 reactio…

A Why does stearic acid melt at 69 °C but linoleic acid melts at-5°C? Drag the t

A Why does stearic acid melt at 69 °C but linoleic acid melts at-5°C? Drag the terms on the left to the appropriate blanks on the right to complete the sentences. Part lower Becau…

A Wind tunnel laboratory is located atop a mountain which is 10,000 ft above sea

A Wind tunnel laboratory is located atop a mountain which is 10,000 ft above sea level on a standard day. A manometer is connected to a static pressure port in a wind tunnel lest …

A World of Compounds The line structures of a variety of common organic compound

A World of Compounds The line structures of a variety of common organic compounds made of C, H, and O atoms are shown to the right. HO F O Determine the types of IMFs between a pa…

A Yahoo! answers user suggested that there are 5^5 possible unique configuration

A Yahoo! answers user suggested that there are 5^5 possible unique configurations for a physical key, but the answer wasn't sourced. I wondered if anyone had similar numbers for h…

A Yes/No answer will not suffice, I need an explanation! Two separate measuremen

A Yes/No answer will not suffice, I need an explanation! Two separate measurements are to be performed on a gas enclosed in a piston-and-cyliner device. In the first measurement t…

A Zn atom on the electrode loses 2 e- which join the collection of delocalized e

A Zn atom on the electrode loses 2 e- which join the collection of delocalized electrons on the metal. What is the reaction for this event? Is this an oxidation or a reduction? Ex…

A Zn atom on the electrode loses 2 e- which join the collection of delocalized e

A Zn atom on the electrode loses 2 e- which join the collection of delocalized electrons on the metal. What is the reaction for this event? Is this an oxidation or a reduction? Ex…

A Zn-Cu battery is constructed as follows at 25 o C Zn (s) | Zn +2 (aq) (0.20 M)

A Zn-Cu battery is constructed as follows at 25oC Zn(s) | Zn+2(aq) (0.20 M) || Cu+2(aq) (2.5 M) | Cu(s) The mass of each electrode is 200.0 gram and the volume of the electrolytes…

A Zn2+ l Zn half-cell is connected to a Cu2+ l Cu half-cell tomake a galvanic ce

A Zn2+ l Zn half-cell is connected to a Cu2+ l Cu half-cell tomake a galvanic cell, ( l = salt bridge stuffs) inwhich Zn2+=Cu2+=1.00M. The cell voltage at 25 degrees ismeasured to…

A \"calorie\" is a unit of energy, defined as the amount of energy needed to rai

A "calorie" is a unit of energy, defined as the amount of energy needed to raise the temperature of one gram of water by one degree Celsius. The nutritional labels on food product…

A \"chemistry magic\" demonstration might involve dropping red-brown pieces of c

A "chemistry magic" demonstration might involve dropping red-brown pieces of copper metal into a colorless silver nitrate solutions. The resulting reaction yields grains of silver…

A \"chemistry magic\" demonstration might involve dropping red-brown pieces of c

A "chemistry magic" demonstration might involve dropping red-brown pieces of copper metal into a colorless silver nitrate solutions. The resulting reaction yields grains of silver…

A \"chemistry magic\" demonstration might involve dropping red-brown pieces of c

A "chemistry magic" demonstration might involve dropping red-brown pieces of copper metal into a colorless silver nitrate solutions. The resulting reaction yields grains of silver…

A \"generic\" phase diagram for a typical pure chemical substance is given in Fi

A "generic" phase diagram for a typical pure chemical substance is given in Fig 5.12 of Atkins. What is the physical significance of the critical point in the phase diagram? The v…

A \"perfect number\" is a positive integer that is the sum of all its proper fac

A "perfect number" is a positive integer that is the sum of all its proper factors (that is, factors including 1 but not the number itself). The first two perfect numbers are 6 an…

A \"pulse oximeter\" operates by using light and a photocell to measure oxygen s

A "pulse oximeter" operates by using light and a photocell to measure oxygen saturation in arterial blood. The transmission of light energy as it passes through a solution of ligh…

A \"silver\" ring was purchased at a local store. It was stamped \"sterling silv

A "silver" ring was purchased at a local store. It was stamped "sterling silver" which means that it must contain 92.5% by mass Ag. The remaining 7.5% may technically be any other…

A \"titration\" problem. Calculate the pH of a solution that results from mixing

A "titration" problem. Calculate the pH of a solution that results from mixing 10.0 mL of 0.200 M HOAc (pK_a = 4.74) with 12.0 mL of 0.100 M NaOH. Fill in the following ICE table …

A _______ reaction, two or more elements of compounds from one product. Decompos

A _______ reaction, two or more elements of compounds from one product. Decomposition single replacement combustion double replacement combination The following reaction takes pla…

A a Take Test Online Quiz w 1 -ci x C chegg study l Guided solution x C Secure h

A a Take Test Online Quiz w 1 -ci x C chegg study l Guided solution x C Secure https://courses.cscc.edu/webappslassessment/takellaunch jsp?course sessment ida 48 Question Completi…

A accidental genetic mutation in the lab mice has occurred and affects the glyco

A accidental genetic mutation in the lab mice has occurred and affects the glycogen degradation pathway. Dr. Wilson is studying this unexpected mutation and has taken samples of t…

A alkaline MnO_2/Zn battery can store 4.5 KJ of energy, put the battery in a fla

A alkaline MnO_2/Zn battery can store 4.5 KJ of energy, put the battery in a flash light which drains 0.60A of current, Please calculate how long the battery can keep the flash li…

A and B Thanks The classic Russian vodka is 40 percent by weight (80 proof), the

A and B Thanks The classic Russian vodka is 40 percent by weight (80 proof), the number being attributed to the famous Russian chemist Dmitri Mendeleev (periodic table of elements…

A and B both please The reaction of an organic compound with O_2 to generate CO_

A and B both please The reaction of an organic compound with O_2 to generate CO_2 and H_2O is called a combustion reaction. The combustion of glucose takes place in living systems…

A bag can contain more than one copy of an item. For example, the chapter descri

A bag can contain more than one copy of an item. For example, the chapter describes a bag that contains the number 4 and two copies of the number 8. This bag behavior is different…

A bag of potato chips contains 585 mL of air at 35.0 C and a pressure of 775 mmH

A bag of potato chips contains 585 mL of air at 35.0 C and a pressure of 775 mmHg . Assuming the bag does not break, what will be its volume at the top of a mountain where the pre…

A balanced chemical reaction gives the mole ratios between reactants and product

A balanced chemical reaction gives the mole ratios between reactants and products. For example, one mole of white phosphorus, P4, reacts with five moles of oxygen, O2, to produce …

A balanced equation that represents an overall cell reactionis shown. Choose the

A balanced equation that represents an overall cell reactionis shown. Choose the cell notation which corresponds to theelectrochemical cell that is described by this equation. St.…

A balanced equation that represents an overallcell reaction is shown. Choose the

A balanced equation that represents an overallcell reaction is shown. Choose the cell notation which correspondsto the electrochemical cell that is described by this equation.Expl…

A balanced redox equation must have which of the following: I. The same number o

A balanced redox equation must have which of the following: I. The same number of each type of atom on both sides of the equation II. The total number electrons lost in the oxidat…

A ball bearing has the following composition of alloying elements (the remainder

A ball bearing has the following composition of alloying elements (the remainder is iron) and has a weight of 3.846g. If we removed 7 sextillion atoms from the ball bearing how mu…

A ball is hanging on a string from the ceiling, and is moving around in a horizo

A ball is hanging on a string from the ceiling, and is moving around in a horizontal circle. The string is 0.8 meters long, and the mass is 6 kg. The string is at a 60-degree angl…

A ball is thrown at a speed of 25 m s^-1 at an angle of 53.10 (measured upward f

A ball is thrown at a speed of 25 m s^-1 at an angle of 53.10 (measured upward from the horizontal) from the top of a 25 m tall cliff. a. What are the initial components of the ve…

A ball is thrown straight up with an initial speed v. The diagram below is a gra

A ball is thrown straight up with an initial speed v. The diagram below is a graph of the height versus time for the motion of the ball. (a) What does the slope of the graph at lo…

A ball is thrown with an initial speed of 20 m/s at an angle of 60\" to the grou

A ball is thrown with an initial speed of 20 m/s at an angle of 60" to the ground. If air resistance is negligible, what is the balil's speed at the instant it reaches its maximum…

A ball of mass (75 plusminus 1) g is fired into a bob of mass (480 plusminus 3)

A ball of mass (75 plusminus 1) g is fired into a bob of mass (480 plusminus 3) g. The dot on the bob rises (4. 1 plusminus 0. 2) cm vertically. The ball is then fired horizontall…

A balloon containing 2.00 moles of He gas has a volume of 0.500 L at a given tem

A balloon containing 2.00 moles of He gas has a volume of 0.500 L at a given temperature and pressure. If balloon loses some amount of helium gas without changing temperature and …

A balloon containing 4.28 L of an unknown gas at 1.00 atm and 298 K has a mass o

A balloon containing 4.28 L of an unknown gas at 1.00 atm and 298 K has a mass of 16.90 g. The empty balloon has a mass of 2.24 g.What is the molar mass of the gas in the balloon?…

A balloon containing Xe is filled with the same number e Exams\" af atoms as ano

A balloon containing Xe is filled with the same number e Exams" af atoms as another balloon containing He. Which statement is true for these balloons at the same temperature and p…

A balloon filled with 0.705 mol of gas contracts reversibly from 1.5 L to 0.25 L

A balloon filled with 0.705 mol of gas contracts reversibly from 1.5 L to 0.25 L at a constant temperature of 10.0 degree C. It simultaneously loses 570 J of heat. Calculate q, w,…

A balloon filled with He initially has a volume of 876 L at 0.0degreeC and 1.0 a

A balloon filled with He initially has a volume of 876 L at 0.0degreeC and 1.0 atm, then the temperature of the balloon is increased to 35degreeC while pressure remains constant. …

A balloon from the local store has a volume of 2.69 liters and an interal pressu

A balloon from the local store has a volume of 2.69 liters and an interal pressure of 1.83 atmodpheres at 22 degree C. How many moles of gas does if contain? A) 2.72 B) 4.93 C) 0.…

A balloon has a pinhole 10 micrometer diameter. It is filled with O2 at pressure

A balloon has a pinhole 10 micrometer diameter. It is filled with O2 at pressure 2 * 10^4 Pa, and T=298 K. a) How many molecules per second escape? b) The ballon is a sphere 1m in…

A balloon is filled with 0.896 g of butane gas, C 4 H 10 (g), and 4.553 g of oxy

A balloon is filled with 0.896 g of butane gas, C4H10(g), and 4.553 g of oxygen and sealed. If the butane was combusted to form carbon dioxide gas and water vapor (yes, consider t…

A balloon is filled with helium gas. The concentration of helium inside the ball

A balloon is filled with helium gas. The concentration of helium inside the balloon is 0.3 kg/m^3 and the concentration of helium outside is negligible. The diffusion coefficient …

A balloon is filled with helium to a volume of 1050 L on the ground, where the p

A balloon is filled with helium to a volume of 1050 L on the ground, where the pressure is 745 mmHg and the temperature is 20 degree C. A) Calculate the amount (in mol) of helium …

A balloon is floaling around outside your window. The temperabure outside is -19

A balloon is floaling around outside your window. The temperabure outside is -19 C, and the air pressure is 0800 atm. Your neighbor, who release balloon, tels you that he filed it…

A balloon is floating around outside your window. The temperature outside is -3

A balloon is floating around outside your window. The temperature outside is -3?C , and the air pressure is 0.700atm . Your neighbor, who released the balloon, tells you that he f…