How many joules of energy are needed to raise the temperature of an item 55 degrees if the heat capacity of the item is 259 J/"C? O 20400J O 314J O 14245 J O 4.71

Q: Predict products

A: given : structures of reactants.

Q: In the lab you will use ~0.6130g of KHP (potassium hydrogen phthalate) to titrate with your ~0.2M Na...

A: Given,  Mass of KHP (potassium hydrogen phthalate) = 0.6130 g  Molarity of NaOH = 0.200 M  What is t...

Q: A 0.542 g sample of an unknown monoprotic weak acid requires 28.67 ml of 0.1093 M NaOH for neutraliz...

A:

Q: 1. Write the equilibrium constant expression for each reaction. a. 25O29) + O2(0) = 2S03(9) 1 b. N2O...

A: Answer: Equilibrium constant is the ratio of molar concentration of products and molar concentration...

Q: What would be the net ionic equation?

A:

Q: 0.542 g sample of an unknown monoprotic weak acid requil O 88.0 g/mol ) 109 g/mol O 173 g/mol O 218 ...

A: Given : Volume of NaOH = 28.67ml Molarity of NaOH = 0.1093M  Mass of unknown sample = 0.542g

Q: The area of an object is calculated from experimental data to be 24.6623 cm2. The t absolute error i...

A: ANSWER:-    We can determine the area  by using  Absolute error = Experimental data - Theoritical da...

Q: How much heat is___________ evolved/absorbed when 2.22 x 102 moles of N2 are consumed ?  N2   +   3...

A:

Q: The area of an object is calculated from experimental data to be 24.6623 cm2. The t absolute error i...

A:

Q: What is the valence bond description for H2O, HNNH, and ClF3?

A: Valence bond description : it gives idea about sigma bonds, π bonds, l.p. for central atoms.   

Q: A 0.280 M solution of hydroxylammonium has a pH of 3.30. What is the Ką of hydroxylammonium? O a. 9....

A:

Q: A photon of blue light has a frequency of 8.00 × 10¹⁴ Hz. Calculate the wavelength of this photon (c...

A: frequency =  8.00 × 10¹⁴ Hz  

Q: 13. Data: Reaction Rates by pH for 2-bromo-2methylpropane in seconds 14. Data: Reaction Rates by pH ...

A: 2-bromo-2-methyl-propane undergoes sn1 reaction. The given compound is tertiary compound. In a sn2 m...

Q: What is Ka at 25°C for the following equilibrium given Kb (CH3NH2) = 4.4 × 10–4 at 25°C.?

A:

Q: Nitrogen dioxide reacts with water to form nitric acid and nitrogen monoxide according to the equati...

A: 3NO2(g) + H2O(l) --> 2HNO3(l) + NO(g)  Moles of NO2 = 14 mole Moles of H2O = 4 mole  

Q: The threshold frequency for indium is 9 96 x 1014s. What is the energy, in joules, of a photon of th...

A: Given,  Threshold frequency = v0 = 9.96 x 1014 s-1  What is the energy in J of a photon of this radi...

Q: Using Hess's Law calculate Koverall 4 NH3 ( +5 02 ( 4 NO () + 6 H2O () Koverall 2 NO () K 0.25 i) N2...

A: At equilibrium, the rate of the forward and the reverse reaction is the same and the concentration o...

Q: Calculate the pH of a vinegar solution with an acetic acid HC2H302 concentration of 0.75 M.

A:

Q: 7. Using the table below for the relative acid strength, arrange the following species in order of d...

A: Bronsted-Lowry acid-base theory: The Bronsted-Lowry acid-base theory states that the acid is a subst...

Q: II rome File Edit View History Bookmarks Profiles Tab Window Help Watch Gilmore Girls | Netflix (2 u...

A:

Q: What is the overall reaction order of this reaction, Rate=k[NO]²[Cl2]

A:

Q: Which of the following does NOT represent a pair of resonance structures? H H H2C-CECH + H2C=c=CH OH...

A: Resonance effect describes the polarity produced in a molecule by the interaction between the lone p...

Q: Which of the following compounds is most acidic? A в D B

A:

Q: 7. Describe which of the following is unsaturated, saturated, or supersat- urated? All solutions are...

A:

Q: Outcome 10- Bridge Assignment 1 Ring Naming/Aromaticity 1) Name these molecules: tor NH2

A: Since you have posted question with multiple subparts, as per guidelines we cannot answer more than ...

Q: How many moles of carbon dioxide could be produced if 10 moles of octane, C gH 18, are combined with...

A: Given No. of mole octane = 10 moles  No. of moles oxygen= 20 moles  find no. of moles CO2     

Q: The density of octane, C8H18C8⁢H18, is 0.703 g/mL0.703 g/mL. Calculate the number of moles of octane...

A: Given Data :  1.density of octane = 0.703 g/mL  2. Volume = 49.1 mL  Molar mass of octane = 114.23 g...

Q: A=[0.30],[0.60],[0.30] (mol/l) B=[0.15],[0.30].[0.30] (mol/l) C= 7.0 x 104,2.8 x 103,1.4 x 103(mol/L...

A:

Q: What is the pH when: a. 0.15 mL of 1 M NaOH has been added to 30.0 mL of 0.10 M CH3COOH? b.0.15 mL...

A: Given: Ka of acetic acid = 1.8*10-5 pKa of acetic acid = 4.75

Q: Reaction Data Time (s) [ClO) (mol/L) 0.12 x 10-3 8.49 x 10-6 0.96 x 10- 7.10 x 10-6 2.24 x 10-3 5.79...

A: The data given is,  

Q: What is meant by the phrase, "the binding constant is determined by how fast things come together an...

A: Binding affinity is typically measured and reported by the equilibrium dissociation constant (KD), w...

Q: 3 Consider the reaction of a 20.0 mL of 0.220 M C,H;NHCI (Ka = 5.9 x 10) with 12.0 mL of 0.239 M CSO...

A: It is an example of neutralization reaction  Here we are required to find the moles of reactant afte...

Q: "For an electron the probability that it is in the volume dt is y? dr = (a'n)'e 2/ dt for the 1s orb...

A: "Since you have asked multiple questions, we will solve the first question for you. If you want any ...

Q: What is the solubility of KNO3, Ce2(SO4)3 and CaCl2 at 40℃?

A: Solubility is written in g/100 g  unit.  For this we would use the given solubility curves of given ...

Q: What is the hydroxide-ion concentration in a 0.10 M solution of Na2CO3? For carbonic acid, Ka1 = 4.2...

A: Given,  Thr hydroxide-ion concentration in a 0.10 M solution of Na2CO3 is: For carbonic acid,       ...

Q: Air is composed of approximately 78% N2, 21% 0z and 1% percent other gases. Calculate the density of...

A: We will use ideal gas equation to solve this problem. At STP , Temperature = 273.15 K and Pressure =...

Q: The discovery of penicillin in 1928 marked the beginning of what has been called the "golden age of ...

A: The name and structure of the following functional group are :

Q: need reaction energy diagrams for the following heat of formations..

A: Reaction energy diagram is the diagram drawn bassed on the energy Vs reaction coordinate . On the di...

Q: For the reaction pictured, the experimental enthalpy is -41.3 ± 1.3 kJ mol-1. When using the Gaussia...

A: The correct answer is given below

Q: What would be the net ionic equation

A: Given, _FeS(s) + _HCl(aq) ➝ _FeCl2(aq) + _H2S(g) Net ionic equation = ? Balanced chemical equation: ...

Q: See attached graph and: Match the following (Using the letter): Freezing point depression ...

A: Solutions are  homogeneous  mixture of two or more components. The major components are called solve...

Q: How many moles of solid NaF would have to be added to 1.0 L of 1.85 M HF solution to achieve a buffe...

A:

Q: What is the concentration of hydroxide ion in a (7.20x10^-2) M aqueous solution of methylamine, CH3N...

A: Answer: When methylamine is dissolved in water it will produce OH- ions as shown below: CH3NH2(aq)+H...

Q: wher

A: Given polymer is : Provide the monomer components of this polymer = ?    

Q: 3. The mercury in a 1.0023-g soil sample was precipitated with an excess of paraperiodic acid, HŞIO6...

A: Given: Mass of Hg5(IO6)2 = 0.4996 g. And mass of sample used = 1.0023 g.  

Q: VSEPR theory predicts which shape for the molecular structure of the following molecules or molecula...

A: Valence shell electron pair repulsion theory, is a model used in chemistry to predict the geometry o...

Q: How many stereoisomers are formed in the reaction below? Please note: both alkenes will react under ...

A:

Q: WHAT IS THE NUCLEAR MASS AND NUCLEAR DENSITY OF GOLD?

A: Nuclear mass The mass of an atomic nucleus, measured in atomic mass units, is less than the total of...

Q: Calculate the wavelength (in meters) of a photon that has a frequency of 6.0*; 10 ^ 13

A: Answer: Given value of frequency of photon is: ν=6.0×1013s-1

Q: Determine the major organic product(s) of the following reaction. Include appropriate stereochemistr...

A: Given incomplete reaction is :