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

77,997 results, page 9

ochem

If you recrystallize a compound with a 1/2 ethanol/water mixture and water remains in the compound after recrystallization, would that change the melting range of the pure compound?

Chemistry

You have 11.20 grams of compound. It is known that the compound has a half-life of 3.8 days. HOw long will it take for the compound to decay to 0.350 grams?

chemistry

You have 11.20 grams of a compound. It is known that the compound has a half-life of 3.8 days. How long will it take for the compound to decay to 0.350 grams?

English

The house is disorganized but it's not dirty... classify the sentence A. Simple B. Compound C. Complex D. Compound - complex I think it is compound but I am not sure

language

Which of the following is a complete sentence? A. When I was young and ambitious and loved going for walks in the park. B. Running through the park and around the school before breakfast. C. Walking with a limp as a result of the wreck. D. I went walking.

Chemistry

Because of the changing color of the solution as the following reaction proceeds, the rate law can be determined by measuring the rate of disappearance of the permanganate ion (MnO4-). 2MnO4-(aq)+ 5H2C2O4(aq) + 6H+(aq) -> 2Mn2+(aq) + 10CO2(g) + 8H2O(l) The following initial...

Chemistry

You carry out an exothermic reaction inside a Styrofoam cup calorimeter, using a temperature probe to monitor the temperature throughout the reaction. You find that the temperature increases 7.40 °C during the reaction. The specific heat of the reaction solution is known to ...

Chemistry

A compound contains only nitrogen and hydrogen and is 87.4% nitrogen by mass. A gaseous sample of the compound has a density of 0.977 g/L at 680. torr and 84.1°C. What is the molecular formula of the compound?

Chemistry

Compound A is added into a calorimeter that contains 0.750 litres of water. If the dissolution of 5.0 g of this compound causes the temperature of the water to rise to 45.0 °C, what is the enthalpy of solution of compound A?

Chemistry

Compound A is added into a calorimeter that contains 0.750 litres of water. If the dissolution of 5.0 g of this compound causes the temperature of the water to rise to 45.0 °C, what is the enthalpy of solution of compound A?

chemistry

Determining a Molecular Formula from an Empirical Formula 1. A compund has an experimental molar mass of 78g/mol. Its empirical formula is CH. What is its molecular formula?

chemistry

Determining a Molecular Formula from an Empirical Formula 1. A compund has an experimental molar mass of 78g/mol. Its empirical formula is CH. What is its molecular formula?

chemistry- transferring energy

For the following questions, use the reaction SO3(g) SO2(g) + O2(g), with ÄH = 98.4 kJ/mol and ÄS = 0.09564 kJ/(mol·K). (8 points) i. Draw a possible potential energy diagram of the reaction. Label the enthalpy of the reaction. (2 points) ii. Is the reaction endothermic or ...

Chemistry Help!!

Types of Reactions Worksheet Balance the following equations and indicate the type of reaction taking place: 1) 2 NH3 + 3 I2  N2I6 + 3 H2 Type of reaction: ____________________ 2) 3 Ca(OH)2 + Al2(SO4)3  3 Ca(SO4) + 2 Al(OH)3 Type of reaction: ...

AP Chemistry

I need alot of help on this problem, it is due WEDNESDAY and I have no clue how to do it Use the following information to identify element A and come pound B, then answer questions a and b. An empty glass container has a mass of 658.572 g. It has a mass of 659.452 g after it ...

chemistry

the reaction of 7.10g carbon with excess O2 yields 12.25g of CO2. what is the percent yield of this reaction? I have tried everything and looked through all of my notes and nothing is working for stiochiometry

chemistry

How many grams of chlorine gas could be produced by the decomposition of 58.5g of sodium chloride according to the following equation.? 2NaCl = 2Na + Cl2

Science

The solubility of a compound in water is 6.8g/100ml at 25°C.. Calculate the amount of water required to crystallize 10g of the compound. If the pure compound is collected at 25°C what is the maximum possible yield percent.

chemistry

The solubility of a compound in water is 6.8g/100ml at 25°C. Calculate the amount of water required to crystallise 10g of the compound. If the pure compound is collected at 25°C what is the maximum possible yield percent?

Chemistry

Consider the following reaction at constant P. Use the information here to determine the value of ΔSsurr at 398 K. Predict whether or not this reaction will be spontaneous at this temperature. 4 NH3(g) + 3 O2(g) → 2 N2(g) + 6 H2O(g); ΔH = -1267 kJ A)ΔSsurr...

English

Which of the following is not a type of sentence? A. Simple-compound B. Simple C. Compound-complex D. Complex my answer is b.

English

Which of the following is not a type of sentence? A. Compound-complex B. Simple C. Complex D. Simple-compound My answer is A

English

Which of the following is not a type of sentence? A. Compound-complex B. Simple C. Complex D. Simple-compound My answer is D

chemistry

Which of the following statements is not true? 1.Chemical equilibria are examples of reversible processes. 2.When multiple reaction steps are in equilibrium, then the equilibrium constant for the net reaction is the product of the individual reactions. 3.The equilibrium ...

Chemistry

What are the Empirical Formulas of the following compounds? K21P7014 = Al12Ag6O5 = H2C12O24 = C12H30O60 = Dicarbon tetrachloride = Baking Soda =

Chemistry

What are the Empirical Formulas of the following compounds? K21P7014 = Al12Ag6O5 = H2C12O24 = C12H30O60 = Dicarbon tetrachloride = Baking Soda =

chemistry

Which of the following is a feature of an aromatic compound? Which of the following is a feature of an aromatic compound? It has a strong aroma. Its formula contains only six carbon atoms. It contains a benzene ring. It contains only carbon-carbon double bonds.

Chemistry Question

The reaction of quicklime (CaO) with sulfur dioxide (SO2) is an important reaction for reducing SO2 emissions from coal-fired power plants: CaO(s) + SO2(g) → CaSO3(s) This reaction is an example of: A. a precipitation reaction B. an electrolysis reaction C. a combustion ...

Organic Chemistry

Compound A is recrystallized from n-propanol. Given are the following solubilities (in 100 mL of solvent): 160 g/100 °C, 100 g/80 °C, 60 g/60 °C, 20 g/20 °C, 15 g/10 °C and 10 g/0 °C. How many milliliters of solvent are needed to dissolve 80.0 g of compound A during the ...

chem

The decomposition of 3.32 g CaCO3 results in an actual yield of 1.24 g of CaO. What is the percent yield of calcium oxide for this reaction? CaCO3(s) → CaO(s) + CO2(g)

Chemistry

The decomposition of hydrogen peroxide is first order in H2O2: 2H2O2(aq) → 2H2O(l) + O2(g) Rate = k [H2O2] How long will it take for half of the H2O2 in a 10-gal sample to be consumed if the rate constant for this reaction is 5.6 x 10-2 s-1?

Chemistry

The decomposition of hydrogen iodide on a gold surface at 150 oC HI(g) ½ H2(g) + ½ I2(g) is zero order in HI. In one experiment, when the initial concentration of HI was 0.206 M, the concentration of HI dropped to 3.71E-2 M after 898 seconds had passed. Based on these data, ...

Chemistry

Calcium oxide, or lime, is produced by the thermal decomposition of limestone in the reaction CaCO3(s) arrow CaO(s) + CO2(g). What mass of lime can be produced from 2001.2 kg of limestone?

chemistry

a sample consisting 22.7g of a nongasous unstable compound X is placed inside a metal cylinder with a radius of 8Cm and a piston is carefully placed on the surface of the compound so that for all practical purposes the distance between the bottom of the cylinder and the piston...

Chemistry

Elemental analysis of a compound, once used as a pesticide, was found to be 74.2% carbon, 8.64% hydrogen, and 17.2% nitrogen. This compound has a molecular mass of 162.23g/mol, what is the molecular formula for this compound?

Chemistry

A compound is characterized by the following constants: Heat of fusion = 75 cal/g Heat of vaporization = 20 cal/g The heat of deposition for the same compound is

Chemistry

your reactants are an element and compound that is not not a hydro carbon. What type of reaction do you probably have??

Chemistry

The reaction of methyl-benzene with HNO3 in the presence of catalyst will provide what main compound?

Chemistry

I don't understand these two questions. Any help on how to figure this would be great. Thanks. 1. Write the equation for the decomposition of the hydrate, MgC*XH₂O 2. Write the equation for the decomposition of the hydrate, CuSO₄*XH₂O.

Science

An example of active immunity is the transfer of A. antibodies through the placenta. B. immunoglobulins through breastfeeding. C. antigens through vaccination. D. immune cells through a blood transfusion. I think c 46. Which of the following classes of biological molecules ...

chemistry

Suppose a substance has been prepared that is composed of carbon, hydrogen, and nitrogen. When 0.1156 gram of this compound is reacted with oxygen, 0.1638 gram of carbon dioxide (CO2) and 0.1676 gram of water (H2O) are collected. Assuming that all the carbon in the compound is...

Chemistry

A chemist is producing copper(II) chloride using the following reaction: Cu(s) + Cl2(g) --> CuCl2(s) In one reaction, the chemist uses 15.0 g of copper metal and 10.0 g of chlorine gas as reactants. When the reaction reaches completion, 16.0 g of copper(II) chloride has ...

EMpirical and Molecular Formula

A forensic scientist is given a white substance that is thought to be cocaine. The substance is found to have a percent composition: 49.48% H, 5.19% H, 28.85% N, and 16.48% O. What is the empirical formula for this substance? Is it cocaine?

HARD CHEM QUESTION

A chemical system within a sealed 1 L reaction vessel is described by the following reversible reaction equation: 2H2S(g) <-->2H2(g) + S2(g) If the equilibrium constant is 0.000 004 200 at 1103 K find: the reaction quotient initially.

chemistry

he decomposition of nitrogen dioxide at a high temperature is second order in this reactant. NO2(g) NO(g) + 1/2 O2(g) The rate constant for this reaction is 3.40 L/mol·min. Determine the time needed for the concentration of NO2 to decrease from 2.30 mol/L to 1.30 mol/L.

Chemistry

A compound contains only hydrogen and nitrogen and is 12.6% hydrogen by mass. A gaseous sample of the compound has density of 0.925g/L at 690 torr and 110 degree Celsius. What is the molecular formula of the compound?

chemistry

Which of the following can we predict from an equilibrium constant for a reaction? 1 The extent of a reaction 2 Whether the reaction is fast or slow 3 Whether a reaction is exothermic or endothermic a. 1 only b. 2 only c. 3 only d. 1 and 2 only e. 1 and 3 only

Chemistry

Consider the following chemical equation: HgO(s) → Hg(l) + O2(g) How many milliliters of oxygen gas at STP are released from the decomposition of 3.00 g of mercuric oxide?

chemistry

. Compound C (MW = 550) is provided at a concentration of 25g/100mL. 1mL is taken and compound D is to be added (MW = 1025, concentration = 75mM) to give a final ratio of compound C:D of 4:1 moles ratio. What volume of compound D is to be added? ***Dr BOB222 THE 4:1 RATIO IS ...

chem

A greenish blue salt known to be composed of copper and chloride ions is dissolved in DI water. Aluminum metal is used to reduce the copper ions to metallic copper, which is collected, dried and weighed. If the origanal sample has a mass 1.362g and the collected copper has a ...

P.E.

Which of the following habits will help you stay on the "wellness end" of the health continuum? Staying up to late and not getting enough rest*** Going on a calorie-limiting diet Jogging regular with friends Going to the movies

Chemistry

Please help me with these problems, the book examples very different. I'm really confused. Any help with these will help me immensely. Thank you in advance! What I got were: 1.)c 2.)d 3.)a 4.)c 5.)b 1.) When is any endothermic reaction spontaneous? a.)When ΔSreaction >...

chemsitry

b. The decomposition reaction may be written in this form: C12O36H20N12 (s) → 12CO2 (g) + O2 (g) + 6N2 (g) + 10H2O (l) In the enthalpy diagram below, the arrows represent standard enthalpy reactions. (3) denotes the standard enthalpy of decomposition of C12O36H20N12 (s...

chemistry

b. The decomposition reaction may be written in this form: C12O36H20N12 (s) → 12CO2 (g) + O2 (g) + 6N2 (g) + 10H2O (l) In the enthalpy diagram below, the arrows represent standard enthalpy reactions. (3) denotes the standard enthalpy of decomposition of C12O36H20N12 (s...

Calc.

Calculate the following: a) Find g(f(1)) b) Find lim x-> 1+ g(f(x)) c) Find f(g(0)) d) Find lim x->0- f(g(x)) f(x)= 1-x, x<1 1, x=1 x-1, x>1 g(x)= -x, x<0 2, x=0 x+2, x>0 This is where it gets hard. I have a graph for f(x) and one for g(x). I will explain ...

Chemisty

I need a recap of how to do the question below. I just need the basic guidelines: The enthalpy change for the reaction 2H2(g)+O2 > 2H2O is -571.6kJ. Determine the enthalpy change for the decomposition of 24.0g H2O.

lanuage arts

What is a coplex, compound, and compound-complex. Sorry it was complex, compound, and compound-complex. Thank you for using the Jiskha Homework Help Forum. Try the following site: http://www.infoplease.com/cig/grammar-style/sentence-structure-fab-four.html

Chemistry

Your Open Question Show me another » Chemistry help needed... Confused? The following reaction is first order and the rate constant is 2.35 x 10^-4 s^-1 at 20 degress C. 2 N2O5 -----> 2 N2O4 + O2 A.) What is the rate of reaction if the [N2O5]=.25 M? B. What would the [N2O5...

English

Would the sentence below be: SIMPLE, COMPLEX, COMPOUND, or COMPOUND COMPLEX? The students prepared for the exam, and the instructors administered it on Thursday. Would it be a compound sentence? You are right. These are two independent clauses, since each would stand as a ...

Math

Hello, could someone please go over the steps for this question? Thank you! 1. Find the circumference. Leave your answer in terms of pi. The middle line going through the circle is 8.4 (I'm so sorry I don't know the name of the line, brain fart). A) 12.6 pi cm B) 4.2 pi cm C) ...

Chemistry

42. List 2 things a chemical formula indicates about a compound: -It indicates the elements present in the compound. -The relative amount of each compound. Are those correct? 44. What element do most of the polyatomic ions contain? Thanks -MC

11th chemistry

The chlorination of ethane gives a compound with the percent composition by mass of chlorine in the compound is 71.7% A) find the molecular formula of this compound B) write the condensed structural formulas of the isomers of this compound and give their names C) one of the ...

grammar simple, compound/complex

1. We like stories which have unusual endings. <-- compound 2. The novel that was written is about dragons. <-- complex 3. The main character Adela is interesting; she is a warrior. <-- Compound 4. Dragons are ruining the small village in the story. <--- simple 5. ...

Chemistry

Maleic acid is an organic compound composed of 41.39% C, 3.47% H, and the rest oxygen. If 0.271 mol of maleic acid has a mass of 31.4 g, what are the empirical and molecular formulas of maleic acid? So I checked the problem again, and yes this is the whole problem. I even ...

Chemistry

Suppose a compound is involved in three different reactions denoted R1, R2, and R3. Tripling the concentration of this reactant in all three reactions causes the rates of reaction to increase by factors of 3, 9, and 1, respec- tively. What is the order of each reaction with ...

Chemistry

A reaction: A(aq) + B(aq) <-> C(aq) has a standard free-energy change of –4.65 kJ/mol at 25 °C. What are the concentrations of A, B, and C at equilibrium if, at the beginning of the reaction, their concentrations are 0.30 M, 0.40 M, and 0 M, respectively? Im not even ...

chemistry

The reaction described by this equation O3(g) + NO(g) -- O2(g) + NO2(g) has the following rate law at 310 K. rate of reaction = 3.0x10^6 M^-1 s^-1)[O3][NO] Given that [O3]=2.0× 10–4 M and [NO]=2.0× 10–5 M at t=0, calculate the rate of the reaction at t=0.

Chemistry

The decomposition of N2O5(g) --> NO2(g) + NO3(g) proceeds as a first order reaction with a half-life of 30.0 seconds at a certain temperature. If the initial concentration [N2O5]0 = 0.400 M, what is the concentration after 120 seconds?

Chemistry

4.12 grams of Zinc are placed in a crucible with 3.00 grams (excess) of Sulfur. when reaction is complete the product mass is 6.10 grams. What mass of Sulfur should be used in the simplest formula calculation? Find the empirical formula of Zinc Sulfide. My work... 6.10 g ...

chemistry

Which of the following statements is true about the nucleus? Only the strong nuclear force holds the nucleus together. The strong nuclear force and the residual strong force hold the nucleus together. The presence of neutrons, the strong nuclear force, and the residual strong ...

CHEM

9.60 g of hydrated nickel (II) sulfate is heated to produce 5.26 g of anhydrous compound NiSO4. Calculate the number of moles of anhydrous nickel (II) sulfate. Calculate the number of moles of water lost. What is the empirical formula of the hydrate?

English

I am going to play cricket. I am not going to play cricket. Are you going to play cricket? Yes, I am./ No, I'm not. 1. What are you going to play? I'm going to play cricket. 2. What are you going to do? I'm going to play cricket. ------------------- All the sentences are ...

Chemistry

What happens when an electric current is passed through a solution of an ionic compound?

science

plse help me. thx a million confused ok here it is Two compounds NaCl (an ionic compound) and water (a covalent compound). write a profile related to how each compound useses electrons to make a bond. plse help me with this

Chemistry

Consider the reaction HCHO(g) *) H2(g) + CO(g). 1.0 mol of HCHO, 1.0 mol of H2 and 1.0 mol of CO exist in equilibrium in a 2.0 L reaction vessel at 600C. a) Determine the value of the equilibrium constant Kc for this system. 2.0 moles of HCHO and 1.0 mol of CO are then added ...

Chem

At 25°C the following heats of reaction are known: 2C2H2 + 5O2 ---> 4CO2 + 2H2O; ΔH = -2600 kJ C + O2 ---> CO2 ; ΔH = -394 kJ 2H2 + O2 ---> 2H2O; ΔH = -572 kJ At the same temperature, calculate ΔH for the following reaction: 2C + H2 ---> C2H2; ΔH = ?? I don't...

Science-Chemistry

I did a lab on Elements and Compounds and I would be grateful if u could provide and tell me some information on my work. Lab --Investigation--Elements and compounds. Can an element be separated from a compound? Can an element form a compound? In this investigation, you will ...

Calculus

In a chemical reaction, substance A combines with substance B to form subtance Y. At the start of the reaction, the quantity of A present is a grams, and the quantity of B present is b grams. Assume a is less than b. At time t seconds after the start of the reaction, the ...

English

Look at the things in the picture. What can you see there? Answer the questions looking at the picture. What are you going to do? I'm going to go for a hike. I am going to write three postcards and send them to my friends. I am going to listen to music with the MP3 player. ...

Chem

3. Chalcocite is an ore from which copper can be extracted for commercial use. The formula for this important ore is Cu2S. In the laboratory it is formed by the following reaction: 2Cu + S ¨ Cu2S The reaction takes place in laboratory conditions that allow the reactant ...

Chemistry

NaN3 is used in some automobile air bags. The impact of a collision triggers the decomposition of NaN3 as follows: 2NaN3(s) to 2Na(s) + 3N2(g). The nitrogen gas produced quickly inflates the air bag between the driver and the windshield. Calculate the volume of N2 generated at...

Chemistry

The reaction for the decomposition of dinitrogen monoxide gas to form an oxygen radical is: N2O(g)==>N2(g)+O(g) . If the activation energy is 250 kJ/mol and the frequency factor is 8.0 x 1011 s-1, what is the rate constant for the first-order reaction at 1000 K? k = A * exp...

Chemistry

Consider the decomposition of a metal oxide to its elements, where M represents a generic metal: M2O3 (s) <=> 2M (s) + 3/2 O2 (g) Given a delta Gf: -770 Kj for the M2O3 0 Kj for the M 0 Kj for the O2 What is the standard change in Gibbs energy for the reaction, as ...

chemistry

Which of the following are empirical formulas? A) Ribose (C5H10O5) B) Ethyl Butyrate (C6H12O2) C) Chlorophyll (C55H72MgN4O5) D) DEET (C12H17ON) (numbers are subscripts)

Chemistry

Write the balanced chemical equation for the decomposition of sodium azide. If this is a redox reaction, show half reactions and determine if spontaneous. The chemical equation is 2NaN3(s) -> 2Na(s)+3N2(g) right? I am confused on the oxidation states for NaN3... please ...

Chemistry(please help)

I have to calculate the concentration of I2 produced (# of moles of I2 produced / L) based on the stoichiometric ratio in the following equation. 2S2O3^2- + I2 -> 2I^- + S4O6^2- So I got 6.6e-3 L*min for the amount of I2 produced. Now I have to calculate the rate for each ...

chemistry

CO2(g) + H2(g) equilibrium reaction arrow CO(g) + H2O(g) Calculate the equilibrium concentration of each compound if 2.00 moles of CO2 and 2.40 moles of H2 are placed in a 3.90 liter container at 300°C. Kc = 2.30 for the reaction at this temperature. [CO2] = M [H2] = M [CO...

Business Math

Solve the following by using the present value formula. Compound Amount- $675 Term of Investment-15 months Nominal Rate (%)- 2.7 Interest Compounded quarterly Present Value ___________? Compound Interest _________?

Chemistry

An ionic compound dissolved in water, separated into its ions according to the following equation: MA2 (s)--> M^+2 (aq) + 2A^- (aq). If the ground state electron configuration of the two ions are similar to those of neon. Ne, and of Kr, the two elements in the ionic ...

Social studies

How die a compound interest rate differ from a simple interest rate? Compound interest rates pay more interest over time Compound interest rates are calculated only once a year Compound interest rates ideally lower than simple interest rates•• Compound interest rates apply...

chemistry

In a reaction involving the iodination of acetone, the following volumes were used to make up the reaction mixture: 10 mL 4.0 M acetone + 10mL 1.0 M HCL + 10 mL 0.0050 M I2 + 20 mL H2O A student found that it took 250 seconds for the color of the I2 to disappear. What was the ...

Math

A rectangular compound has the dimensions 6m by 10m A square carpet is laid in the centre of the compound. the carpet is 3m by 3m. Find the part of the compound that is uncovered by the carpet.

identify sentences

1. Reading is essential for becoming a savvy member of one's community, and writing is essential for expressing one's viewpoint effectively in that community. A. Compound sentence. B. parallel compound sentences. C. 3 point topic sentence, with good parallelism. D. run-on ...

Science

The following reaction: 2SO3 (g) ! 2SO2 (g) + O2 (g) has an equilibrium constant equal to 0.23 M. If the following concentrations are present: [SO2] =0.480 M, [O2] = 0.561 M, [SO3] = 0.220 M, is the reaction at equilibrium? If not, which way must it shift to reach equilibrium?

chem -repost for bobpursley

Posted by polkadot on Friday, April 8, 2011 at 8:46pm. Can someone please help me by explaining and correcting me? 1) A 0.057M solution of a weak acid has a pH of 4.93. Determine the ionization constant, Ka, of the acid. a) 2.1 x 10^-4 b) 2.4 x 10^-9 c) 4.1 x 10^-8 d) 2.8 x 10...

Chemistry

Two elements, R and Q, combine to form two binary compounds. In the first compound, 9.50 g of R combines with 3.00 g of Q. In the second compound, 7.00 g of R combines with 4.50 g of Q. Show that these data are in accord with the law of multiple proportions. If the formula of ...

Chemistry

After 79 mins 20.0% of a compound has decomposed. What is the half life of this reaction assuming first-order kinetics?

Chemistry

A(n) ____ reaction is one in which oxygen reacts with another compound to form carbon dioxide, water, and heat.

chemistry

After 56.0 min, 25.0% of a compound has decomposed. What is the half-life of this reaction assuming first-order kinetics?

Chemistry

After 53.0 min, 14.0% of a compound has decomposed. What is the half-life of this reaction assuming first-order kinetics?

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