A glass contains 250.0 g of warm water at 78.0°C. A piece of gold at 2.30°C is placed in the water. The final temperature reached by this system is 76.9°C. What was the mass of gold? The specifi c heat of water is 4.184 J/g °C, and that of gold is 0.129 J/g °C. 117 51 g

Q: When a 15.4 mL sample of a 0.327 M aqueous hypochlorous acid solution is titrated with a 0.369 M…

A: Answer: HClO is a weak acid and it is being titrated against strong base NaOH and we have to find…

Q: Given the balanced equation:   2 LiOH +  CO2 ? Li2CO3 +  H2O,  how much H2O will be produced if…

A:

Q: An aqueous solution contains 0.473 M hypochlorous acid. How many mL of 0.319 M potassium hydroxide…

A:

Q: The energy E of the electron in a hydrogen atom can be calculated from the Bohr formula: E= - In…

A:

Q: This energy diagram shows the allowed energy levels of an electron in a certain atom. (Note: the SI…

A: From Planck's equation,                    E = hν             Or, E = h × cλ  ------ 1Where, E :…

Q: How do I calculate preparation of mobile phase 25mM ammonium acetate in 0.1L from ammonia 25% and…

A: To prepare a 0.1 L of 25 mM ammonium acetate solution from 25 % ammonium solution and 100 % glacial…

Q: Aqueous hydrochloric acid (HCI) will react with solid sodium hydroxide (NaOH) to produce aqueous…

A: Given: The mass of HCl taken = 0.365 g The mass of NaOH taken = 0.26 g We have to find the mass of…

Q: We start with a sample of pure A(g). The following equilibrium is established 2 A(g) B(g) + C(g) The…

A: Answer:- Firstly using the equilibrium partial pressure, equilibrium constant is calculated then…

Q: Fill in the missing information: symbol F 2- Te atom or ion? check all that apply neutral atom…

A: Every atom has an equal number of electrons and protons so  the electric charge of atoms is zero and…

Q: Assignment: Write a balanced equation for each reaction and determine which substance is oxidized…

A: The balanced reaction can be written by considering reactants and products of a reaction.

Q: -21 This energy diagram shows the allowed energy levels of an electron in a certain atom. (Note: the…

A: We will use the given diagram to determine the energy of ground state and first excited state.  For…

Q: Given the following equation and heat of reaction: 2 moles of A combine with 2 moles of B to…

A:

Q: A chemical engineer must calculate the maximum safe operating temperature of a high-pressure gas…

A: First we calculate the volume of the cylinder. Using the formula πr2h. And we convert the unit to…

Q: An atom of silver has a radius of 165. pm and the average orbital speed of the electrons in it is…

A:

Q: A buffer solution contains 0.10 mol of acetic acid and 0.14 mol of sodium acetate in 1.00 L. Part A…

A:

Q: Just as pH is the negative logarithm of [H3O+]. PK is the negative logarithm of Ka. pKa log Ka The…

A: A solution consisting of acetic acid ( a weak acid ) and acetate ions ( it's conjugate base ) form a…

Q: How many isomers can the following molecular structure have? C5H12

A: isomers: same molecular formula different bonding connectivity molecules are called isomers.

Q: A gas is measured to have the following mass, pressure, volume and temperature: m = 4.83 g, P =…

A:

Q: determite ph of 0.11 molL−1molL−1 NH4Cl 0.12 molL−1molL−1 CH3COONa 0.11 molL−1molL−1 NaClNaCl…

A: #1: NH4Cl or NH4+(aq) is a weak acid with Ka = 5.62x10-10  The dissociation equation is: NH4+(aq) ⇌…

Q: A 0.639 g sample of cobalt, Co, is added to 236 mL of 0.100 M H₂SO, and reacts according to Co (s) +…

A:

Q: Rank solutions from smallest acidity to greatest. To rank items as equivalent, overlap them. NaCl…

A: Acidity and basicity are two opposite terms i.e as the acidity increases, basicity decreases, and…

Q: Boyle's law for enclosed gases states that at a constant temperature, the pressure is related to the…

A: Answer: Change in rate of volume is given in the problem statement and we have to find out the rate…

Q: (3) Write the ionic and net ionic equations of the following molecular equations: (a) FeBr (aq) +…

A:

Q: An engine generates 15.7 g of nitric oxide gas during a laboratory test. How much heat was absorbed…

A: Given -> N2(g) + O2(g) ---> NO(g) ∆H°= 180.5 KJ ---- (1)  Weight of NO = 15.7 gm

Q: How many valence electrons are in a neutral atom of lithium? 0 X S

A: Electrons present on the outermost shell of an atom known as valence electrons. To determine the…

Q: How do you calculate the FeNCS2+ concentration in each solution, assuming that all of the SCN- is…

A: The equation showing the formation of FeNCS2+ is- Fe3++SCN-→FeNCS2+ Thus, 1 mole of Fe3+ reacts with…

Q: Fluorine (F2), the most electronegative element reacts with water in a different way compared to…

A: Hess's law states that the enthalpy change for the overall reaction is determined from the sum of…

Q: 13C NMR Spectrum: 200 180 160 dd 120 100 ppm 80 60 40 20

A: 13C-NMR is used to determine the number of sets on non equivalent carbons in the molecule.

Q: Using the numbering scheme below, which carbons are primary (1°)? - U U U 2 3 4 5 6 07 8 N 6 8

A: -> Primary carbon(1°) is carbon which attached with only one carbon . -> Secondary carbon(2°)…

Q: to produce nitric oxide (NO) and water (H₂O)- Ammonia (NH3) chemically reacts with oxygen gas What…

A: Ammonia(NH3) is reacted with oxygen gas(O2) to produce nitric oxide(NO) and water(H2O). The chemical…

Q: 9 Determine the pH if 25.0 mL of 0.10 M HI solution is added to 0.041 L of a 0.20 M KOH solution…

A: Molarity, M = Moles/Volume(L) M = n/V(L)

Q: Consider the reaction: 2SO2(g) + O2(g) → 2SO3 (9) Using standard absolute entropies at 298 K,…

A: Here we are required to find the  entropy change the reaction.

Q: WHAT ARE IMINES? HOW ARE THEY FORMED?

A:

Q: 1. Which of the following is the most acidic? a. NH3 b. HCI c. HBr d. H3O+ e. (CH3)₂ OH+

A: -> Most acidic acid is that which can give H+ easily . -> The species which are unstable due…

Q: What is the pH of a 0.1494 M Ca(OH)2 solution?  Write your answer to the hundredths place.

A: Molarity of Ca(OH)2 solution = 0.1494 M pH of the solution.

Q: Suppose there is a gaseous mixture of nitrogen and oxygen. If the total pressure of the mixture is…

A: According to Dalton's partial pressure, the total pressure of a mixture will be the sum of the…

Q: Question 4 What chemical equation best describes the oxidation of a group 3 metal? 4 M(s) + 3 O2(g)…

A:

Q: List the following acids in order of increasing acid strength when dissolved in water. EXPLAIN a)…

A: -> As the oxidation state of central atom increases acidity increases. -> If number of oxygen…

Q: Calculate the pH and the equilibrium concentration of CO32- in a 4.57x10-2 M carbonic acid solution,…

A:

Q: Calculate the concentration of CO32, H3O+, and OH¯ in a 0.140 M M solution of H₂CO3. (Kal and Kaz =…

A:

Q: What is the concentration of H3O+ in a sample of saliva that has a pH of 6.6? Type your answer in…

A: Given pH = 6.6

Q: List each substituent on the main chain of this organic molecule on a separate row of the table…

A:

Q: Study the IR and Raman activity of C-O stretches in fac-FeCl3(CO)3 Identify the IR and Raman bands.

A: Fac -FeCl3(CO)3 can be written as ML3(CO)3

Q: A 1,2-dichloro- cyclopentane an example of an addition reaction when it is the product between a can…

A: Answer:- This question is answered by using the simple concept of chemical reactions of alkenes…

Q: Using the numbering scheme below, which carbons are secondary (2°)? E E J 3 1 [] 2 3 st 4 5 06 07 8…

A:

Q: A chemical engineer must report the average volume of a certain pollutant produced by the plants…

A: Given data: Plant volume of pollutant Macon 34.2 L Fall River 42.4 L Pitt 0.12 L We have…

Q: 1. Draw the molecular orbital diagrams for CN-, SO-, PN and XeF. Determine the bond order of each.

A:

Q: A buffer solution is prepared using CN (from NaCN salt) and HCN in the amounts indicated. (Figure 1)…

A:

Q: A few different types of electromagnetic radiation are listed in the table below. Complete the table…

A: Given radiations: red light radio waves infrared radiation blue light We have to arrange them in…

Q: Chemistry By using the role of IUPAC, draw the structure below: 4. 4-hydroxy-3-buten-2-one

A: