milliliters before adding the chain, and 20 milliliters after adding the chain. When I weighed the chain, its mass was 71.5 grams. I believe the chain is solid metal (not gold plated), but is probably a blend of gold and other metals. I looked up that gold has a density of 19.3 g/ml, while the other metals like silver and copper usually blended with gold have a combined density of about 9.7 g/ml.

Q: True or false a) Kappa- and Iota- carrageenans contain 3,6-anhydro-a-D-galactopyranosyl residues. ...

A: Carragenan used in food additives to thicken the food.Kappa carrageenan Found in red seaweed is comm...

Q: -5 atm to kPa 50 atm to bar -937 kPa to torr

A: Answer 1)    76cm Hg is equal to                 =  1 atm  then ,  76.8cm Hg is equal to = (76.8 × 1...

Q: One of the major problems in food chemistry is to make food gels maintain its shape and rigidity. Su...

A: Interpretation- We have to suggest a way tha thow we can maintain gel strength if the polysaccharide...

Q: Which of the following is an aldol condensation product derived from the self-condensation of 2-buta...

A: The aldol condensation product derived from the self condensation of 2-butanone is:

Q: An analytical chemist is titrating 105.0 mL of a 0.5500M solution of ethylamine (C,H,NH,) with a 0.1...

A:

Q: A 22.4 mL sample of 0.155 M HCl is titrated with 0.238 M NaOH. what is the pH after the addition of ...

A:

Q: How many moles of acetate ions are pre your answer to four significant figures.

A:   1. number of moles can be calculate by  Number of moles (n) = Given mass/ molecular mass    2. Mol...

Q: 9. The evaporation of water is endothermic: H2O (1) → H2O (g) AH°rxn = 44.01 kJ/mol What minimum mas...

A: H°rxn = 44.01 kJ / mol 

Q: Write the nuclear reaction of I-131 that undergo alpha, alpha, alpha, beta, positron emission, gamma

A: Product is tin  

Q: 16 Calculate the solubility of Ag,CrO, in water at 25 °C. You'll find K, data in the ALEKS Data tab....

A: Ksp value for Ag2CrO4 is 1.12 × 10-12 Ag2CrO4 <---------------->   2Ag+    +       CrO4-2     ...

Q: metal, or metal. Representative element (main Transition metal Inner-transition metal group element)...

A: Representative element ( main group element) - Se, At, Ra

Q: What is the hybridization of carbon 2?

A:

Q: Draw the structure of citrulline, which is one of the components of the urea cycle. You do not have...

A: Citrulline is an amino acid. It's structure at pH 7 is drawn in the following step.

Q: H3C a. H3C .CH3 CH3 b. H3C° H3C *OH с. HO HOʻ

A:

Q: 4. Consider the reaction between sulfur trioxide and water: SO3 (g) + H2O (1) → H2SO4 (aq) A chemist...

A: 4) Given, SO3(g) + H2O(l) ➝ H2SO4(aq) mass of SO3 react = 61.5 g mass of H2O react = 11.2 Actual yie...

Q: Suppose 2.72 g of potassium bromide is dissolved in 200. mL of a 0.20 M aqueous solution of silver n...

A: When potassium Bromide is added to silver nitrate solution , then as per solubility rules , silver B...

Q: A 0.60 M solution of a weak acid, HA, has a pH of 3.41. What is the percentage ionization of the aci...

A: ★ Answer : percentage of ionization of the acid is 0.064% 

Q: When exactly 750.0 mL of a solution containing 0.5840 N of magnesium hydroxide was combined with 250...

A: Given,  When exactly 750.0 mL of a solution containing 0.5840 N of magnesium hydroxide was combined ...

Q: How many moles of gas are in a gas sample occupying 0.738L at 135 mmHg and 30°C? O 190 mol O 4.01 mo...

A:

Q: DH of the base solution after the chemist has added 484.1 mL of the HNO, solution to it. db nced stu...

A: Given,  Molarity of base =0.270 M Volume of Base = 234.9 mL Mmol of Base =  M × V   = 234.9 × 0.27 =...

Q: The pH of a 0.50 M solution of an acid, HA, is 4.67. Calculate Ka of HA.

A:

Q: During the decomposition of CaO2(s) into Ca(s) and O2(g), 100.0 mL of gas is collected by the displa...

A:

Q: AGCI(s) Ag (aq) +72.68 C1 (aq) +56.4 +96.2 S° (JK-1 mol-1) AH f(kJ/mol) Use the data given to calcul...

A:

Q: The ΔH for the solution process when solid sodium hydroxide dissolves in water is 44.4 kJ/mol. When ...

A:

Q: A solution was prepared by dissolving 5.76 g of KCl.MgCl2.6H2O (277.85 g/mol) in sufficient water to...

A: To solve this problem first we will calculate the mole of KCl.MgCl2.6H2O and then we will calculate ...

Q: Element A has 4 valence electrons; therefore, it is alan Insulator O Conductor semiconductor none of...

A: Insulators are those which do not conduct electricity. Conductors are those which can easily conduct...

Q: An excess of sodium hydroxide is treated with 2.4 L of dry hydrogen iodide gas measured at STP. What...

A:

Q: Which is the reacting species for the reaction? HNO3 H2SO4 The following compound: HON %D O The foll...

A: HNO3 + H2SO4 collectively known as nitrating mixture that will be responsible for adding nitro group...

Q: How many mole of AlCl3 can be produced from 1.4 moles of Al reacting with HCl?

A: The balanced reaction of aluminium with HCl is as :-  2Al + 6HCl ----> 2AlCl3 + 3H2 

Q: The Kan for Ee(OH)3 is 3 x 10 39. What concentration of Fe*3 can exist in solution at pH 3.0 A. 3x 1...

A:

Q: 1. For the reaction shown, find the limiting reactant for each: 4 Al (s) + 3 O2 (g) → 2 Al203 (s) a....

A: The specie which is present in less amount is the limiting reagent.

Q: synthesis of triphenylmethanol

A: Complete mechanism for the synthesis of triphenylmethane has been provided in next step.

Q: For H3PO3, Ka1= 4.06x10^-2 and Ka2= 3.92x10^-7. Calculate the pH of 0.295 molar solution H3PO3

A:

Q: 3) When discovered, Miescher found that the nuclei of pus cells were acidic. We now know that the ch...

A: DNA is formed of a double helix strands, where each strand is composed of sugar moieties and phospha...

Q: Ag (aq) CI (aq) 56.4 AgCl(s) S JK- mol-) AH f(kJ/mol) 72.68 96.2 Use the data given to calculate the...

A: To solve this problem we will use the given data in the table and we will calculate ∆H° and ∆S° to g...

Q: Ammonia reacts with oxygen as follows: 4NH3(g) + 702(g) → 4NO2(g) + 6H2O(g) AH° = -1132 kJ Calculate...

A: 4 moles of ammonia on reacting with oxygen produce 4 moles of nitrogen dioxide gas and 6 moles of wa...

Q: The equilibrium constant for the reaction Br2(g) + Cl2(g) ↔ 2BrCl (g) is 86. If the initial concentr...

A:

Q: Consider the equilibrium of PbCl2 (s) in water. PbCh (s). + Pb*2 (aa)+ 2CH (aa) What is the effect o...

A:  “Since you have posted a question with multiple sub-parts, we will solve first three subparts for y...

Q: You wish to measure the iron content of the well water on the new property you are about to buy. You...

A:

Q: Draw the structure of the major organic product(s) of the reaction. OH • CH,OH NaOCH . You do not ha...

A: Carboxylic acid reacts with alcohol in the presence of acid or base catalyst to form an ester. The r...

Q: Identify the functional group of the given molecule and indicate the classification if there is any....

A: The given structure is:

Q: -Arelektronarm, -Rtert, -Rprim, -H, –Arelektronryk, -Rsek

A: -R p r i m ,-R t e r t, -R s e k ,-A r e l e k t r o n r y k ,-A r e l e k t r o n a r m, -H

Q: 3. If the theoretical yield of a reaction is 0.118 g and the actual yield is 0.104 g, what is the pe...

A: Theoretical yield = 0.118 g  Actual yield = 0.104 g  Percent yield = ? 

Q: An 804. g solution of Kool-Aid contains 377. g of water. What is the mass percent of Kool-Aid mix in...

A:

Q: Questions Describe the steps involved in the preparation of a metallographic sample: Sectioning (cut...

A: Metallographic examination utilises inverted optical light for inspection of material grain Sizing ,...

Q: Draw and provide the Functional Group and R Group for propane.

A: IUPAC nomenclature is used for naming the organic compounds as recommended by international union of...

Q: How many mL of 55% by mass ethanol (density =0.952) is needed to mix with 620 mL of 70% by mass etha...

A: Answer: In this question we have to calculate the mass of the solution and mass of ethanol in terms ...

Q: What is the volume, in liters, of 64.0 g of O2 gas at STP?

A: Given :- mass of O2 at STP = 64.0 g  To calculate :- volume (in L)

Q: 1) Below you are given the structures of the disaccharides lactose and trehalose. он он но он но но ...

A: Here we have to predict acetal and hemiacetal group present in the following  given disaccharides an...

Q: A buffer solution is prepared by taking 0.438 moles of acetic acid (pKa=3.45) and 0.736 moles of sod...

A: We have to predict the pH of the solution.  

Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.