1.00 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have a molecular molar mass of 26. g/mol, is burned completely in excess oxygen, and the mass of the products carefully measured: product mass carbon dioxide 3.39 g water 0.69 g Use this information to find the molecular formula of X. O

Q: Question A sample of water with a mass of 662.8 g undergoes a temperature change from 81.40°C to 18....

A: Concept is based on calorimetry:

Q: e standard entropy change for the following reaction at 25° S(rhombic) + O2(g) SO2(g)

A: From the given data,  □Srxn = Total entropy of products- Total entropy of reactants  □Srxn =( 248.5 ...

Q: What is the theoretical yleld of chromium that can be produced by the reaction of 40.0 g of Cr203 wi...

A: Theoretical yield is the amount of product (Cr here) formed when the given amount of limiting reacta...

Q: Solve all parts otherwise I will downvote

A:

Q: What element forms an ion with an electronic configuration of [Xe] and a −2 charge?

A:

Q: 12.45 What is osmosis? What is a semipermeable membrane?

A: Answer: Osmosis is a natural phenomenon and it found in plants where xylem sap travels across the pl...

Q: Select the correct product of the following reaction series. 1. NaOEt, EtOH 2. Br ? EtO OEt NHAC 3. ...

A:

Q: Assuming that the smallest measurable wavelength in an experiment is 0.710 fm, what is the maximum m...

A: given :-  wavelength = 0.710 fm   speed = 171 m.s-1  To calculate :-  mass of an object (in kg)

Q: PHOTOSYNTHETIC PIGMENTS 1.6 0.7 1.4 0.6 1.2E Soret 0.5 HA 0.4 0.8 COOCH 0.3 0.6 phytyl bacteriochlor...

A: Higher the wavelength shorter will be the energy gap between the two energy levels  

Q: 12.48 Describe how you would use freezing-point depression and osmotic pressure measurements to dete...

A: Colligative properties : These are the properties of any solution , which depends upon the concentra...

Q: 0.0984g of an unknown chloride is dissolved in water a solution of silver nitrate is added an 0.2290...

A: Weight of unknown chloride=0.0984g Weight of silver chloride=0.2290g

Q: A chemical reaction takes place inside a flask submerged in a water bath. The water bath contains 6....

A:

Q: Decide whether each molecule or polyatomic ion is polar or nonpolar. If the molecule or polyatomic i...

A: ★ F2 :  F2 is homonuclear diatomic molecule which is non polar . A homonculear diatomic molecule F2 ...

Q: Which of the following cations will produce precipitates upon treatment with NaOH and NH3 separately...

A: The formation of precipitation upon reaction of metal cation with sodium hydroxide and ammonia can b...

Q: What is the average mass, In grams, of one Zn atom? Multiple Choice O 394 x 10259 O 65.39 amu O 1661...

A: Calculation of mass of zinc:

Q: What kind of solvent ingredients is usually used in the concentrations of 4-10 percent in skin care ...

A: Some chemical are used in skin care product ;some of their function is to soften the skin cell and l...

Q: QUESTION 1 During an experiment, a student mixed 14.5 mL of a 0.500 M sodium fluoride solution with ...

A:

Q: Which of the following occurs when products are added to a chemical reaction in solution or the gas ...

A: -> when reactant or product added then it follow Le-chatelier principle.    

Q: If a plot of 1/[A] versus time produces a straight line with a positive slope for the reaction A B +...

A:

Q: If 2.00 mL of 0.900 M NaOH are added to 1.000 L of 0.450 M CaCl,, what is the value of the reaction ...

A: NaOH and CaCl2 reacts together to form NaCl and Ca(OH)2. So, 2 NaOH + CaCl2 -> Ca(OH)2 + 2 NaCl  

Q: 10- 0.02 g of AGNO3 in 100 ml of water express the concentration in ppm ? 20ppm 200ppm

A:

Q: For the ion given below: NO2- 1. Draw the Lewis Dot structure for the ion on a paper and write the...

A: Lewis structures of NO2-.

Q: Part B 8.10x10 kJ/mol Submit Request Answer • Part C 1860 kJ/mol t

A: E= hc/wavelength

Q: A 50.0 mL sample of 0.436 M NHANO3 is diluted with water to a total volume of 250.0 mL. What is the ...

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Q: What is the bond order of a molecule with 14 electrons

A: A question based on molecule that is to be accomplished.

Q: en the thermochemical equation 2S02(g) + O2(g) – 2SO3(g), AH°rxn-198 kJ/mol, how much heat is evolod...

A: Answer and explanation is given below hope you like it.

Q: When 0.7521 g of benzoic acid was burned In a calorimeter contalning 1,000. g of water, a temperatur...

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Q: Which of the following techniques would NOT result in a titration error? a. Adding 100mL of distille...

A:

Q: A 8.00 L tank at 4.12 °C is filled with 11.7 g of chlorine pentafluoride gas and 14.1 g of boron tri...

A: Partial pressure of chlorine pentaflouride PV = nRT   P= ?  V = 8L  n = 11.7/130.4 = 0.089  R = 8.31...

Q: 1. How many molecules of oxygen are in 50.0 g of oxygen?

A:

Q: Decide whether each molecule or polyatomic ion s polar or nonpolar. do f the molecule or polyatomic ...

A: Polarity of given compounds:

Q: Increasing the temperature of the water by 5 °F would have a significant impact on cooking times. As...

A: Desired boiling point of water = 217 oF Volume of water/solution = 4 quarts The question requires to...

Q: Which combination of AG° and K is possible at standard conditions? 1. AG° = -114 J, K = 0.0053 2. AG...

A:

Q: A reaction will be spontaneous at all temperatures if O a. AH and AS are negative. O b. AH is negati...

A:

Q: What is the mass of 4.50 x 1022 Cu atoms? Multiple Choice O 4.75 g O 63.55 amu O 63.55 g O 7.47 x 10...

A:

Q: A 0.3423 g sample of pentane, C5H12. was burned in a bomb calorimeter. The temperature of the calori...

A: The heat released by the combustion of pentane is absorbed by the water and calorimeter.

Q: Part A As a technician in a large pharmaceutical research firm, you need to produce 100. mL of 1.00 ...

A:

Q: 2. Using the data in Part B, calculate the following and complete the table below. (See pg 5 in Lab ...

A: Answer: Dissolution process of NaHCO3 in water is an exothermic process and in the question we have ...

Q: Provide a chemical formula (AmBn) for the product of the reaction below SH [0]

A: -SH functional group represent a thiol which undergo oxidation to form disulfide.

Q: 25

A: Calculate the standard enthalpy change for the reaction ., 2C8H18 (l) + 17O2 (g) -> 16CO (g) + 18...

Q: Enter your answer in the provided box. 38 The atomic masses of the twe stable isotopes of chlorine, ...

A:

Q: 3. How many water molecules are in 2.00 liters of water? The density of water is 1.00 g/mL.

A: Density of water = 1.00 g/mL It means 1.00 mL water contains 1.00 g

Q: 5. Look at this figure from Blankenship's book, Molecular Mechanisms of Photosynthesis. You can see ...

A: To predict the hybridization state and shape of the particular carbon centre , one has to determine ...

Q: H,SO4 (A) -OH но 180° K,Cr,0,, H,SO4 (B) он (F) (E) (D) (C) \KMNO4, NaOH, Hz0 PCC, pyridine sodl, py...

A: Since you have asked a question with multiple sub-parts, we will solve the first three sub-partts (A...

Q: Why is there a need for buffers? Please explain in depth and detail

A: A buffer solution is a solution that can withstand changes in pH on  addition of acidic or basic com...

Q: alculate the mass of excess reagent remaining at the end of the reaction in which 90.0 g of SO2 are ...

A:

Q: PROBLEM 4: Calculate the pH of the following: a. 0.420 M in sodium formate and 0.200 M in formic aci...

A:

Q: Given that pKa = 4.72 at 25 °C for HN3, what is the pH of 0.125 mol L-1 NaN3(aq) at 25 °C? What is t...

A: A question based on equilibrium concept that is to be accomplished.

Q: Be sure to answer all parts. Predict the sign of the entropy change for each of the following proces...

A: Given,  Predict the sign of the entropy change for each of the following processes : (a). I2 (s) ---...

Q: Liquid octane (CH3(CH,) CH,) will react with gaseous oxygen (0,) to produce gaseous carbon dioxide (...

A: Mass of octane = 3.4 g Mass of oxygen = 21.2 g

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".