What is the concentration in % (w/w) of a solution containing 20.0 g of NaCl dissolved in 250.0 g of H2O? a. 6.7% b. 6.61 % c. 8% d. 7.41%

Q: Discuss the Steroids structure?

A: Stereochemistry is branch of chemistry in which we deal with arrangement of atoms in molecules.

Q: Exactly 0.32540 g of pure Na2CO3 was dissolved in 100.0 mL of 0.0853 M HCl, determine the a) mass of...

A: Weight of Na2CO3 = 0.32540 gm Volume of HCl = 100.0 ml = 0.1 L ( 1 L = 1000ml) Molarity of HCl= 0.08...

Q: deltaG

A:

Q: What is salt hydrolysis? Group of answer choices reaction with water to produce hydronium ions only ...

A: Answer: Only ions coming from weak acid or weak base gets hydrolyzed.

Q: In squash soup: what are the browning reactions in squash

A: Browning reactions are complex reactions which occur when food is processed. In some cases brown col...

Q: H,CO A B H. E

A:

Q: Cyclic peptides received increasing amounts of attention because of their pharmaceutical propertie i...

A: Cyclic peptides have much importance in Pharmaceutical industries. This cyclic peptides are formed V...

Q: Which of the following terms best classifies the following molecule? N.

A: Different chemical compounds that are used in drugs serve the purpose based  on specific mechanism o...

Q: The compound contains multiple chromophores that would absorb energy and cause an electronic transit...

A:

Q: Arrange the measurements in ascending order: 0.001 m, 0.001 km, 1 pm, 0.1 mm, 10 cm, 100 um, 1000 nm

A: Arrange the measurements in ascending order--

Q: Which statement explains why metals conduct electricity when solid? A They have atoms which are free...

A: A metal is a substance which shows lusture and are sonorous  They have many physical properties whic...

Q: Enter yeur ansmer in the provided bor. The reaction between nitric exide (NO) and oxygen to form nit...

A: Nitric oxide reacts with oxygen to form nitrogen dioxide. The equation for the balanced chemical rea...

Q: C-OH COOH 100° Amide HO `NHCH

A: Here we have to write the major product formed in the following given reactions.  

Q: 1.50 g hydrocarbon compound undergoes combustion to produce 8.80 g of CO2 and 5.40 g of H2O. What is...

A:

Q: Phosphorus-32 (0) decays by beta emission to form sulfur-32 (©). How many half-lives have passed in ...

A: Phosphorus-32  decays by beta emission to form sulfur-32. We have to find How many half-lives have p...

Q: To wire your stere0 equipment, 325cm of speaker wire is needed, which sells for $0.15M. How much wil...

A: Length of speaker wire = 325 cm

Q: The van der Waals equation of state was designed (by Dutch physicist Johannes van der Waals) to pred...

A:

Q: Answer the following questions about the Lewis structure for iron (III) hydrogen phosphate, Fe2(HPO4...

A: Lewis structure of Hydrogen phosphate ion is given by,  

Q: A 0.0670-g quantity of acetic acid is dissolved in enough water to make 50.0 mL of solution. Calcula...

A:

Q: One way the U.S. Environmental Protection Agency (EPA) tests for chloride contaminants in water is b...

A: Here only we have to use the mass of AgCl precipitate. We convert it into moles and from that we can...

Q: 1. PCC HO 2. Methylamine (CH,NH2) and NABH;CN 3. NaNO, / HCI ? NO NO ON NEN N. CH3 N. CH3 CH3 CH3 B ...

A: Given is organic reaction.   

Q: Which of the following solutions will, when mixed together, produce a precipitate? O Cacl, (aq) and ...

A: Given options are : a). CaCl2 (aq) and Na2CO3 (aq)  b). LiOH (aq) and NaOH (aq)  c). Pb(NO3)2 (aq) a...

Q: Be sune to answer all parts Calcalate the leralar ms or ferle ef cah of e fll (a) CH

A: Molecular mass- The sum of the atomic masses of all atoms in a molecule

Q: Select the element, from the halogens, with the lowest 1st ionization energy? Which of the listed e...

A: 1. Select the element, from the halogens, with the lowest 1st ionization energy? Answer- Iodine beca...

Q: if ammonia is added with cupric oxide,how many moles of gas is produced from 6 moles of cupric oxide

A: Number of moles of cupric oxide = 6  Number of moles gas produced = ?   

Q: on to react with the ketone in the remainder of the mechanism. The reaction takes placCe under acidi...

A:

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

A: Given data: Mass of benzoic acid = 0.7521 g Heat of combustion of benzoic acid = - 26.42 kJ/mol Mass...

Q: What would be the final concentration if a 7.56 mL solution of 12 M NaCl solution is diluted to a vo...

A:

Q: (Equation 1) 4 Fe2O3(s) + 20 NO2(g) + 22 H200) + 5 O2(g) → 8 Fe(OH)3(s) + 20 HNO3(ag) AH= -1811.2 kJ...

A: Given :-  4Fe2O3(s) + 20NO2(g) + 22H2O(l) + 5O2(g) → 8Fe(OH)3(s) + 20HNO3(aq), ∆H = -1811.2 (kJ/mol)...

Q: ulate the pH at the equivalence point in the titration of 50 mL of 0.10 M methylamine = 4.3 × 10) wi...

A:

Q: A technician is producing hydrogen gas. He adds methane gas, steam, and a nickel catalyst to an empt...

A: Answer: Chemical equilibrium is a dynamic equilibrium and when a system reaches this state, rate of ...

Q: How much heat is required to raise the temperature of 15 x 10g of water from 45F to 130F? The specif...

A: Answer: This question is based on the following formula: Q=mS∆There:Q=heat exchangedm=mass of the wa...

Q: When B2H6 reacts with oxygen to form HBO2 and H2O, what mass of B2H6 will be needed to burn 36.1 g o...

A:

Q: What is the average mass, in grams, of one Zn atom? Multiple Choice 65 39 g 65.39 amu 1.09 x 1022g 1...

A: The mass of an atom can be determined from the molar mass and Avogadro's number. The number of atoms...

Q: What is the average mass, in grams, of one Z a Mutple Choice O 1001 a 10 24. 66.39 amu 394 x 102 109...

A: No of atom is equal to mole × avagadro number

Q: What is the pH after 0.150 mol of HCl is added to the buffer from Part A? Assume no volume change on...

A: When acid is added the concentration of HA increases and concentration of salt decreases. 

Q: HO. НО + CH3 H2 н С. °C + H CH3 H2 HO C. N. °C ОН ÓH noradrenaline adrenaline AH? -3182 kJ/mol -246 ...

A:

Q: In a liter of 0.2F solution of propionic acid, HC3H$O2 it has ionization constant of 1.34 x 10-3, ca...

A: The formality solution is the number of formula mass of any solute dissolved in 1 litre of solution....

Q: n the thermochemical equation 2502la) + Ozlal – 2503lal. AHnen -198 kJimol, how much heat is evolved...

A: Molar mass SO2 is 64.066

Q: For a Hydrogen Atom these energies can be calculated by the following equation: Lan he -- Ar - R R-2...

A: Energy of Helium ion is given by, Eelectron=-(8.7149×10-18n2) J   The energy released as a photon (E...

Q: A HCN – NaCN solution has a pOH of 8. The HCN concentration is 0.2F. Find the concentration of the N...

A: Consider the given information is as follows; pOH = 8 Ka of HCN = 4×10-10 Concentration of HCN = 0.2...

Q: Which of the following processes is exothermic, given the following: N2(9) + 2 O2(g) → N204) AH°= 9,...

A: Given -> N2(g) + 2O2(g) --> N2O4(l).      ∆H°= 9.67 kJ/mole N2(g) + 2O2 (g)--> 2NO2(g).    ...

Q: Calculate AStot for the evaporation of 165 mol of persons sweat. Because the persons temperature doe...

A: Entropy of the substance is  amount of  energy that is present in the system but unavailable to do w...

Q: according to the equation below. 6CO.(g) + 6H,0(1) C,H,O,G) + 60,(8) Substance CO.lg) H,O() CH,Odls)...

A:

Q: manganese atom: n 1 mi M; e- e- n M. 1 6. 7 3 8 4 9 10 d) Is the element manganese paramagnetic or d...

A:

Q: is NaHSO4 polar or nonpolar?

A: Given -> NaHSO4      

Q: 2. Acid HKl, He0 Cこu base Naoll,1120 0-14 (0) O NH-2 base Navii, I20 cil2-0-C- (H3 420 KOH H20 pcid ...

A: Amides undergoes faster hydrolysis than esters.

Q: hat is the mass of 4.50 x 1022 Cu atoms? Multiple Choice 747 x 102 g 4.75 g

A: Molar mass Cu is 63.546

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

A: The complete solution of the given question is as under : Here it is important to note that the give...

Q: Select Draw Rings More Erase H CH;CH2OK CH;CH,OH heat Br

A: This is the concept of Organic chemistry