What is the empirical of compound (X) going through the following decomposition reaction?

78,095 results, page 99

Chemistry - Concentration and Time

1. How is the rate affected by doubling the concentratino? 2. Explain the effect of concentration on the rate of a reaction in terms of the "Collision Theory" of chemical reactions. 3. Considering that 1/Time is proportional to the rate of the reaction how is the rate of the ...

chemistry

Free Energy and Temperature A certain reaction is non-spontaneous at lower temperatures but becomes spontaneous when the temperature is raised sufficiently. For this reaction, S is positive. S is negative. H is negative. G becomes positive at higher temperatures. G is always ...

quantitative chemistry

Determine [Zn2 ], [CN–], and [HCN] in a saturated solution of Zn(CN)2 with a fixed pH of 1.78. The Ksp for Zn(CN)2 is 3.0 × 10–16. The Ka for HCN is 6.2 × 10–10. I know the following is what needs to be done, but im unsure of how to go about it. 1. Write the pertinent ...

Chemistry

In a lab that I am doing I am having difficulty in determining this: What are two indications that suggest a reaction has taken place when HCI was added to Mg? In this lab I am taking 0.1 Mg and adding it to the flask, then recording the temperature of the Mg which is (21 C). ...

chemistry

Calculate the change in entropy (ΔS˚) of reaction (J/K) for the equation as written. BaCO3(s) → BaO(s) + CO2(g) Table: S° (J/(K mol)) BaCO3(s) = 112 BaO(s) = 70.3 CO2(g) = 213.7 So the answer is -41.7 I thought to find the entropy of reaction you subract the ...

Physics

A 60-cm-long, 500 g bar rotates in a horizontal plane on an axle that passes through the center of the bar. Compressed air is fed in through the axle, passes through a small hole down the length of the bar, and escapes as air jets from holes at the ends of the bar. The jets ...

chemistry

Write the balanced net ionic equation for each of the following: 1) The reaction of dilute nitric acid with solid aluminum oxide. 2) The reaction of nitrous acid (HNO2) with potassium permanganate to produce nitrate and Mn(II) ions. Thanks for any help. How much of this do you...

steev

can u help this the qustion is : A circle passes through the points (1,4)&(5,0) and its centre lies on the line x+y-3=0.Find (i) the equation of the circle and it parametric equations . (ii) the centre,diameter and area of the circle . (iii) the equation of the tangent at (1,4...

math

can u help this the qustion is : A circle passes through the points (1,4)&(5,0) and its centre lies on the line x+y-3=0.Find (i) the equation of the circle and it parametric equations . (ii) the centre,diameter and area of the circle . (iii) the equation of the tangent at (1,4...

chem

The following reaction is used in some self-contained breathing devices as a source of O2. 4KO2(s) + 2C02(g)---> 2K2CO3(s) + 3O2(g) Suppose that a sample of CO2(g) is added to an evacuated flask containing KO2(s) and equilibrium is established. The equilibrium partial ...

Chemistry

You want to determine the heat of reaction when a sodium chloride solution is formed using a 10.0 g sample of NaCl(s) and 50.0 mL of water in a coffee cup calorimeter. Which of the following equations would you use? Assume the specific heat of the solution is the same as the ...

Algergra

I am stumped! I have been working on these problems for the longest time and I can not figure out what I am doing wrong. Some how when I get to the last two steps I mess up, and I am beyond frustrated. The directions say: Write an equation of the line containing the given ...

Science

Name a compound machine and tell what simple machine it contains? pencil sharpiner wedge and wheel and axle

Chemistry

How do you know if you use a single, a double, or a triple bond when drawing the Lewis structure of a compound? How do you know if a bond is covalent or ionic?

biology

Organic compounds-a)carbohydrates b)lipids c)proteins d)nucleic acid (Explain what each organic compound is and why it is important to the cell)

Chemistry

What kind of compound would you add to the water-insoluble amine aniline to make it more soluble in water?

Chemistry

Beside the usual method of titrating with KMNO4, what is/are the alternative method/s to test for the presence/amount of oxalate in a compound?

chemistry

In one mole of the compound nitrogen diox- ide, what fraction of the total number of ions is the nitrogen ion?

chem

The mass of one molecule of the compound is 2.53 x 10^-22.Determine the molecular formula for methyl salicylate. emprical formula = C8H803

chemistry

Curcumin is a compound found in tumeric. What functional group is not present in curcumin?   a. phenol b. aldehyde c. ether d. ketone

chemistry

a chemist needs 2.00 grams of a liquid compound witha density of 0.785 g/cm^3 density. what volume of compund is required?

Chemistry

Find the molecular formula of a compound that is 48.38% carbon, 8.12% hydrogen, and 53.5% oxygen by mass and has a molecular weight of 328 g/mol.

chemistry

(a) Calculate the molar mass of the unknown compound. The freezing point of benzene is 5.48°C, and the Kf of benzene is 5.12 °C/Molal. Show your work

maths --plse help ..sumebudy help me to solve this

On a certain sum, Compound interest is Rs41 and Simple interest is Rs 40. for 2 years. What is the rate p.a.?

AP Chemistry

0.015 moles of a compound are dissolved in 18 fl. oz. of water. At what temperature will the solution begin to freeze? The density of water is 1.00g/mL

chemistry

the solubility of the fictitious compound administratium fluoride in water is 3.091e-4.calculate the value of solubility product ksp

Chemistry

Do the properties of a newly formed chemical compound tend to differ from or be the same as the properties of the individual elements that compose it?

compound intrest

she borrowed 32,000 at 3.5% on december 26, 2012, and paid it off February 21, 2014. how much did she pay in intrest?

chemistry

how to calculate the ph level of 2.5g NaOH, 2g H2SO4 and 1.5g ethenoic acid in water? Each compound being put in a liter of water.

Chemistry

a chemist needs 2.00 grams of a liquid compound witha density of 0.785 g/cm^3 density. what volume of compund is required?

Chemistry

a chemist needs 2.00 grams of a liquid compound witha density of 0.785 g/cm^3 density. what volume of compund is required?

math

Brianna invests $3,500, at 12% interest, compounded quarterly for 1 year. Manually calculate the compound interest for this investment.

math

Carla invests $3,000, at 8% interest, compounded quarterly for 1 year. Manually calculate the compound interest for this investment.

math/compound

Calculate the interest earned on an investment of 2500 invested at an interest rate of 6.15%/a compounded quarterly for 10 years.

math

On your birthday, you deposit $540.00 in an account that pays 6% interest compound anually. How much is in the account 3 years later?

Algebra

what is the interest rate necessary for an investment to quadruple after 5 years of continuous compound interest? I keep getting r=11%

Chemistry 101

A chemist needs 2.00 grams of a liquid compound with a density of 0.785 g/cm^3 density. what volume of compund is required?

AP Biology

I have the compound C20H24O2N2, A quinine molecule The Question: Calculate the molarity of 100.7g of quinine in 275 mL of water.

MATHS

The compound interest on a certain sum for 5/2year at 5%per annum compounded annually is rs416.20.find the sum

FINANCIAL MANGEMENT

a client invests 100 000 with an interest rate of 8% with quarterly compound what will the interest be after a year

Algebra

Invest $2800 @ 4.7% a year (compound). How long it will take to double the amount invested to the nearest tenth of the year?

physics

An apple is placed 17.0 cm in front of a diverging lens with a focal length of magnitude 23.2 cm. What is the image distance i of the image of the apple through this lens? What is the magnification of the image of the apple? Wwhich of the following statements are true and ...

Physics

An apple is placed 17.0 cm in front of a diverging lens with a focal length of magnitude 23.2 cm. What is the image distance i of the image of the apple through this lens? What is the magnification of the image of the apple? Wwhich of the following statements are true and ...

chemistry

how is a chemical mixture distinguished from a chemical compound?

math 10 general math

what is the yield for 8.5% compound continously?

English

Are the words "awake" and "discovered" compound words?

chemistry

what is the name of the compound (cooh)ch=ccl(cooh)

chemistry

name the compound CH3CH=C(CH3)CH(CH3)2.

Algebra

Solve the compound inequality. 4≤y+2≤-3(y-2)+24

Ela

Why do complex sentences differ from compound sentences?

ChemISTRY (WEBWORK)

A student measures the potential for cells containing A+B+and C+ ions and their metals and records his data in the table below: ............. Overall Reaction ................Potential (V) Cell#1'''''''A(s) A+(aq) B+(aq) B(s)''''''''''''0.90 Cell#2''''''A(s) A+(aq) C+(aq) C(s...

HAMLET!!!!

ACT II, Scene II The ambassadors from Norway seem to be intruding on the play. Why has Shakespeare allowed such an intrusion? okay my answer well for the audence to wonder what is going to happen next like to lure the audenice more into the play and to stick around to see what...

Chemistry

A calorimeter contains 21.0 mL of water at 14.0 degreesC. When 1.90 g of X (a substance with a molar mass of 70.0 g/mol) is added, it dissolves via the reaction X(s)+H_2O(l)reacts to make X(aq) and the temperature of the solution increases to 28.5degreesC. Calculate the ...

Chemistry

You carefully weigh out 19.00 of powder and add it to 76.95 of solution. You notice bubbles as a reaction takes place. You then weigh the resulting solution and find that it has a mass of 88.16 . The relevant equation is CaCO3+2HCl ----> H2O + CO2 + CaCl2 Assuming no other ...

soc-120

Thanks for the info. I have come up with my introduction on this. Can you take a look and see if this is good way to start? Racial discrimination is currently going on all the time in the United States and most people are unaware of it. The most popular place for this to be ...

Chemistry

How do I solve this problem? According to the following reaction, how many grams of mercury(II) oxide are needed to form 22.4 grams of oxygen gas? mercury(II) oxide (s) mercury (l) + oxygen (g)grams mercury(II) oxide

chemistry

According to the following reaction, how many grams of copper(II) chloride are necessary to form 0.984 moles silver chloride? silver nitrate (aq) + copper(II) chloride (s) silver chloride (s) + copper(II) nitrate (aq)

Algebra

A student earns $0.65 for each mistake she finds in a text. Sketch the equation of direct variation. An equation of direct variation is of the form M = k X where k us a constant. In your case M might be total money earned and X is the number of students. Clearly M = 0.65 X The...

Calorimetry Chemistry

Please help with these questions. Thanks Consider the reaction C12H22O11(s)+ 12O2(g)-->12CO2(g)+11H2O(l) <-- in which 10.0 g of sucrose,C12H22O11 , was burned in a bomb calorimeter with a heat capacity of 7.50 kJ/ degrees celsius. The temperature increase was found to be...

Chemistry 1

You carefully weigh out 17.00g of CaCo3 powder and add it to 68.85g of HCl solution. You notice bubbles as a reaction takes place. You then weigh the resulting solution and find that it has a mass of 78.88g . The relevant equation is CaCo3(s)+ 2HCl(aq)---> H2O(l)+ CO2(g)+...

Chemistry

Hi, I am stuck on this question and would appreciate some guidance. The question states " The value of Kw decreases as the temperature decreases. Is the auto-ionization of water an exothermic or endothermic reaction in the forward direction?" I feel like the answer should be ...

Chemistry

I am having a hard time figuring out how to write a balanced equation for the reaction of iron and oxygen to produce iron(II) oxide. I also need a balanced equation for the reaction of iron and oxygen to produce iron (III) oxide. I would appreciate any and all help. Thanking ...

Chemistry

When 50 grams of hydrocarbon X are burned with oxygen the products are carbon dioxide and water. If 65 grams of water and 100 grams of carbon dioxide are produced, how many grams of oxygen were needed for the reaction? This was a question on my chemistry homework but I'm ...

middle school social studies

i Choose "A" is this correct???........Anne Hutchinson questioned all the following ideals of the Massachusetts Bay Colony EXCEPT a. the notion that women should be inferior in matters of religion. b. the notion that salvation came from being a member of the elect. c. the ...

Finance

You are thinking of buying a craft emporium. It is expected to generate cash flows of $30,000 per year in years 1 through 5, and $40,000 per year in years 6 through 10. If the appropriate discount rate is 8%, what amount are you willing to pay for the emporium

geography

A country in southeast Asia between Burma and Laos used to be called Siam. What is it called today? My answer is Thailand. Is this right? How many countries does the Antarctic Circle pass through? My answer is zero. It does not pass through any countries. Is this right? Thanks...

Science

Which of these statements concerning the interaction of light waves with the glass of a greenhouse is correct? A. Infrared is transmitted through the glass and is changed to heat B. The glass reflects ultraviolet waves C. Visible light is transmitted through the glass Or D. ...

Algebra..

Find the slope of the straight line that passes through the given points or state that the slope is undefined. Then indicate if the line through the points rises (left to right), falls (left to right), is horizontal, or is vertical. 1. (7, 4) and (1, 1) 2. (-3, 4) and (2, -1) ...

Linear algebra

Let L1 be the line passing through the points Q1=(−2, 1, 1) and Q2=(−4, 4, 0) and let L2 be the line passing through the point P1=(−6, −6, 0) with direction vector →d=[9, 6, 3]T. Determine whether L1 and L2 intersect. If so, find the point of intersection Q. ...

Reaction Engineering

The irreversible elementary reaction 2A ---+ B takes place in the gas phase in an isothermal tubular (plug-Jlow) reactor. Reactant A and a diluent C are fed in equimolar ratio, and conversion of A is 80%. If the molar feed rate of A is cut in half, what is the conversion of A ...

Chemistry

Please heellppppppppp!!!! How do you expect the following series of compounds to compare in behavior in the two tests?(Sn1/Sn2 reaction) CH3-CH=CH-CH2-Br CH3-C=CH-CH3 ! Br CH3-CH2-CH2-CH2-Br Please help me answer this question, I really don't understand and don't know how to ...

science

how do i reword this purpose staetment for my experiment? Lab Manual: Purpose: To measure a physiological quantity,your reaction time to both audio and visual stimulus. Rewording: To scientifically measure the test subjects reaction time in both audio and visual stimulus.(is ...

chemistry

The alcoholic fermentation of350 g/l glucose syrup ceases when the alcoholic degree of the mixture attains 16º (16ml ethanol in 100ml of the solution) Write the reaction of the fermentation reaction. Consider the fermentation of 100L of the glucose syrup. Determine the volume...

math

Work the following area application problem. You are given the job of laying carpet for a six-story building. At each floor the dimensions of the floor are 75 meters in length by 40 meters in width. A stairwell takes up a space 2.5 m by 1.5 m, and cuts through each floor. If ...

Art

I left out the following sentences. Thank you very much for your invaluable help, Writeacher. 1) On my summer holiday(s) I’m competing in a chess tournament in the first week of July. It will probably be difficult because the best players will participate. 2) Where will you ...

psychology

Hi, i need some help in this assigment please can you guys help me Instructiions sources must be cited in APA format. your response should a minimum 1 single spaced page Talent and ambition alone do not predict who will push on to reach a goal and who will give up when going ...

Chemistry

What is the complete ionic equation for the following reaction? Aqueous iron(III) sulfate is added to aqueous sodium sulfide to produce solid iron(III) sulfide and aqueous sodium sulfate.

Inorganic chemistry

Given the following standard reduction potentials, Fe^2+(aq) + 2e^- ==> Fe(s) E naught = -o.440V FeS(s) + 2e^- ==> Fe(s) + s^2-(aq) E naught = -1.010V determine the Ksp for FeS(s) at 25 degrees Celsius Fe(s) ==> Fe^2+ + 2e^- (oxidation) FeS(s) + 2E^- ==> Fe(s) + S^...

chemistry

when magnesium chlorate under goes decompostion, oxgen gas is realsed in the following reaction: 2KClO3→ 2KCl + 3O2 repeat 2KClO3→ 2KCl + 3O2 when 3.50 grams of potassuim chlorate is decomposed at STP, how many litters of oxgen will be produced? chemistry - Da

CHEM

Consider the following reaction: 3Pb(NO3)2(aq) +Al2(SO4)3(aq) ¡÷ 3PbSO4(aq) + 2Al(NO3)3(aq) Determine the mass (in gram) of lead(II) sulphate (PbSO4) and aluminium nitrate [Al(NO3)3] formed in the solution when 8.84 g of lead(II) nitrate [Pb(NO3)2] was reacted with 6.28 g of...

Chemistry

This is a three part problem I need help in figuring out pleaseI n each of the questions below you are going to determine a different type of balanced equation for the same reaction. Make sure your equations have the lowest whole number coefficients possible. Indicate the ...

Chemistry

This is a three part problem I need help in figuring out pleaseI n each of the questions below you are going to determine a different type of balanced equation for the same reaction. Make sure your equations have the lowest whole number coefficients possible. Indicate the ...

Calculus

How many critical points does the function f(x) = [(x-2)^5][(x+3)^4] have? A. 1 B. 2 C. 3 D. 5 E. 9 --- Ok, these are my thoughts on this question: My impulse was to do derivative of the function. However, if I'm going to set the function equal to zero to find some critical ...

chemistry

Here is the question: Automobile air bags use the decomposition of sodium azide as their source of gas for rapid inflation: 2NaN3(s)-->2Na(s)+3N2(g) What mass (g) of NaN3 is required to provide 40.0 of N2 at 25.0 C and 763 torr? Here is my work: P=1.0039atm or 763torr V=40....

physics.

resistors of 30 ohms and 60 ohms are connected in parallel and joined in series to a 10 ohm resistor. the circuit voltage is 180 volts I need to find 1)the voltage of the parallel circuit 2)the resistance of the complete circuit 3)the voltage across the 10 ohm resistor 4) the ...

chemistry

In the following reaction, how many grams of ferrous sulfide (FeS) will produce 0.56 grams of iron (III) oxide (Fe2O3)? 4FeS + 7O2 d 2Fe2O3 + 4SO2 The molar mass of ferrous sulfide is 87.92 grams and that of iron (III) oxide is 159.7 grams.

Chemistry

Hi, we have done an experiment in class where we have an equalibrium between (Co(H2O)6)^+2 + 4Cl^- <-> (CoCl4)^-2 + 6H2O where we added HCl dropwise until a colour change occured which changed the solution into a dark blue as the concentration of the Cholride ions ...

Combustion

In a combustion reaction, do the products or the reactants store more energy? It is the products right? As heat energy goes into the products. Potential energy is greater in the reactants. Heat is lost in the reaction, so the products have lower energy. Imagine wood before it ...

Chemistry

Rxn 1:     4 NH3(g) + 5 O2(g) ⇌ 4 NO(g) + 6 H2O(g)         If the equilibrium constant, Kc, for Rxn 1 is 0.0015, determine the equilibrium constant, Kc, for the    reaction:   2 NH3(g) + 5/2 O2(g) ⇌ 2 NO(g) + 3 H2O(g) I'm not sure how to start this problem ...

chemistry-net ionic equations

Whats the net ionic equation for the decomposition of hydrogen peroxide (H202)? I know that it decomposes into water and O2 but is H202->H20+O2 the net ionic or does the H2 and O2 split up to be H2 + O2 -> H20+O2 and if so is the net ionic then just H2->H20?? The H ...

science

Another question. How do I find out how many molecules of water of hydration are in each formula unit of a compound? I want to solve the actual problem myself, but would like some headway.

chemistry

Why is it necessary to wait until the filter paper containing a compound is completely dry before weighing it? and how would it effect the theoretical yield? HIgher?? lower??

investing

My son informed me that a comic book I purchased for 10 cents in 1948 is worth $55 today. What has been the average annual compound rate of return on that valuable asset?

word scramble

can you help me unscramble these compound words? sbytb-ai,rliagotelsnkr-,vindr-ie,oc-lletnsfro,pa-ttiemr,tecaei-kds,vitfyin-een,rleboriah-w-nt,ekediasrw-t,oddi-efhasonl

organic chemistry

in gas chromatography, why do E1 and E2 give different peaks (areas) though it's the same compound?? For example, for 1-butene, the percent composition is low in E1 but very high in E2.

Chemistry(Please help)

What is the pH of a 5.06E-2 M aqueous solution of sodium acetate? I know that I would set this up the same way I did for the previous question that I posted. I am just confused on how to find the Ka. I know it is kw/kb but for what compound is what I do not know.

Chemistry!!!!!!

a compound is analysed and found to have the atomic composition of C 54.5454% H 9.0909 % o 36.3636%. at a temp. of 120C and a pressure of 608 mm the density is 2.183 g/L. what is its molecular formula.

Chemistry

Which compound would you expect to have the lowest melting point? Base your answer off of the bonding theory presented in this course. MgO BeS NaCl KCl

Maths-financial

Determine the compound interest rate,correct to two decimal places,Emile would require to triple his investment over a period of 10 years?

Chemisty

Which compound would you expect to have the highest melting point? Base your answer off of the bonding theory presented in this course. BeO MgO CaO SrO

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