Sterling silver contains 925 parts silver and 75 parts copper by mass. What is the percent silver in sterling silver in the sample? A) 92.5% B) 8.11% C) 12.3% D) 7.50% E) 100%

Q: Write balanced net ionic equations for the following reac-tions, and label the conjugate acid-base…

A: The pair of acid and base differing from each other by just one proton is called conjugate acid-base…

Q: C + 2 H2 ----> 1 CH4 What is molar ratio of C to H2 ?

A: C + 2H2 --> 1CH4

Q: Mg(NO3)2+ (NH4)2C204→ Ca(NO3)2 + (NH4)2C2O4 – Sr(NO3)2 + (NH4)2C204 Ba(NO3)2 (NH4)2C2O4-

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Q: Never heat the mixture until the distillation flask is dry as this may cause an explosion. O True O…

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Q: Calculate the mass percent of chlorine in CCl6

A: Mass percent is a percentage of amount of an atom in the given molecule.  The mass percent of…

Q: Which has a higher percentage of chlorine: Freon-12 (CCl2F2) or Freon-141b (C2H3Cl2F)

A: Percentage of chlorine = (mass of chlorine in compound/mass of compound) × 100%

Q: What about the percent N in the ammonia ion NH4+?

A: Ionic weight of ammonium ion, NH4+ is 18.04 amu.

Q: Calculate the mass percent of Zn in ZnO.  Report your answer to 1 decimal place.

A:

Q: Ca(NO3)2 (Ca2*) k. White Na2CO3 (CO32") 1. NR Na2s (s2) NaOH (OH-) m. White n. NR Na2SO4 (SO42")…

A: The net ionic equation is expressed as the number of ions should be same in both the side.

Q: 1.1) What is a balance used for ? 1.2) What are the four major type of balances used ? 1.3) Why when…

A: 1.1) In chemistry, a weighing balance is used to determine the weight or mass of the chemical…

Q: 1. _CaCl2 + _Na3PO4 → _Ca3(PO4)2 + _NaCl 2. _ NaCl03→_ NaCl+02 3. _C2H4 + _02→ _CO2 + _H2O 4. _N2 +…

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Q: Diamonds are made of pure carbon. How much does a diamond weigh if it is composed of 1.06x1023…

A:

Q: Three samples of compounds we analyzed for the elemental compositions and the following results were…

A: The technique in which a sample of a compound is analysed for its elemental composition is known as…

Q: 1. Sodium 2. Lithium 3. Beryllium 4. Neon_ 5. Calcium 6. 1s²2s' 7. 1s°2s°2p°. 8. 1s 2s 2p³ 9. 1s'…

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Q: Ecell  Mg‎2+(aq) + 2 e- -> Mg(s)    Mg2 + |M‎g = - 2.372  Sn4‎+(aq) + 2 e- -> S‎n2+(aq)  Sn2 + , Sn4…

A: The addition of electrons or decreases in the oxidation state is known as a reduction reaction and…

Q: (1) C(s) + O2(g) → CO2(9) AH = -393.51 kJ mol1 (2) S(s) + O2(g) → SO2(g) A:H = -296.83 kJ mol1 (3)…

A:

Q: Methyl tertiary butyl ether, or MTBE, is currently used as an octane booster in gasoline. It has…

A: Answer:- This question is answered by using the simple concept of calculation pecentage composition…

Q: H2 SO4 + 2 NaCl 2 HCl + + Naz SO4 O 2 mol H2 SO4 2 mol HCl 2 mol HCI 1 mol H2 SO4 2 mol NaCı 2 mol…

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Q: 3g. 2Fe203 + 3C ----> 3CO2 + 4Fe 3h. Fe2S3 ----> 2Fe + 3S 3i. 2KI + Pb(NO3)2 · ----> 2KNO3 + Pbl

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Q: What is the percent by mass of oxygen in morphine, C17H19NO3? Group of answer choices 71.55 6.72…

A: The molecular formula of morphine is = C17H19NO3 The percent mass of oxygen in the morphine is =?

Q: How many corner atoms are shown in this image? number of corner atoms: What fraction of each corner…

A: In any cubic unit cell Corner-8 Face -6  Center-1 Edge -12

Q: Name the following compounds based on their stock and classical method Stock Method Classical Method…

A: There are different type of compounds which have different names depending on the name of cations…

Q: is soluble in water. Its water solution is basic. When solid substance is heated, its volume expands…

A: Given: D is soluble in water. Its water solution is basic. When heated, its volume expands and…

Q: COCH3 -- a) N: OH CO2CH3 CH3 CH2PH N. b) (CH3)½N-C(OCH3)2 .N. 180°C CH2CN(CH3)2 но CH2CH3 CH,CH3…

A:

Q: A gas chromatograph can be used to (more than one answer may be correct) O purify large quantities…

A: Gas chromatography is a technique based on the differential partitioning and migration of components…

Q: d. Cl2 FeCla Br е. SO3 H,SO4

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Q: Ba(NO3)2 + Na2CO3 → Mg(NO3)2 + K2CRO4 → Ca(NO3)2 + K2CrO4 → Sr(NO3)2 + K2CrO4→ -> Ba(NO3)2 + K2CRO4→

A: The incomplete Chemical Reaction can be completed as -  (1) When barium nitrate is treated with…

Q: which has the correct number of atoms in one molecule of dichlorine momooxide A. contains three…

A: To determine No of Atom in a molecule, we must know the molecular formula of that molecule Then we…

Q: 11. CH3 12. CO2 13. C12H22011 14. HCI 15. NacI 16. Candle 17. CaCO3 18. CHON 19. СНЗСH20H 20. Ag O O…

A: Inorganic molecule doesn't have carbon and hydrogen bonds while organic molecules consists of carbon…

Q: CIF 3(9) AH = ? 2.) CIF9) + F2(g) AH = - 49.4 kJ 20F2(9) Ozlg) + 2F2(9) AH= 205.6 kJ Cl,0(9) +…

A:

Q: Determine the formula weight of caffeine, C₈H₁₀N₄O₂. Provide an answer to two decimal places.

A: The formula weight of caffeine can be calculated as follows:

Q: given a sample mass of 0.5074 g and with a

A: Mass of sample = 0.5074 g Mass of imurity = 0.2506 g Mass of Na2CO3 = 0.5074 - 0.2506 = 0.2568 g

Q: Determine the number of atoms of each element in the empirical formula of a compound with the…

A: Given: Mass percent of C = 65.08 % Mass percent of H = 10.14 % And mass percent of O = 24.77 %…

Q: A sample of a compound has a mass of 41.13g. The sample is found to contain 37.28 g of carbon and…

A: Answer: option 2) 90.6% Carbon and 9.4% Hydrogen

Q: State the number of protons in Ag^+. Express your answer as an integer.   State the number of…

A: Electronic configuration of Ag (47) = 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s1 Number of protons…

Q: Substance X was analysed and found to contain 40.00 % carbon, 6.67 % hydrogen and 53.33 % oxygen by…

A:

Q: 2. A 0.9527 g sample containing only KCI and CaCl2 yielded 3.9802 g of dried Hg2Cl2. Calculate the…

A: Given the mass of sample = 0.9527 g Mass of dried Hg2Cl2 formed = 3.9802 g moles of Cl present in…

Q: 1. CaCO3 2. Mg + N₂ 3. FeCl₂ + Na3PO4 4. MnO₂ + Al 5. Zn + H₂SO4 →C40+ CO₂ Mg3N2 Fe2(PO4)2 + NaCl…

A: Types of chemical reaction: 1. Combination reaction- When 2 or more reactants reacts to form a…

Q: 1. 2 Li, Et,0 2. 0.5 equiv. Cul 3. CH3(CH2)2Br -CI

A: In organic reactions role of each reagent is different.

Q: a. CH3 1. NaCN, THF 2. NaSCH3, THF

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Q: Which of the following is most likely going to be a heterogeneous mixture? (A) C10H8 and H2O…

A: Heterogeneous mixture is a type of mixture which has all components in different phases and also the…

Q: BaCl2٠2H2O What is the mass salt?  What is the mass water?  What is the mass percent?

A: Ans

Q: a. pH = 4.5 %3D b. pH 13.1 C. pH = 7.0 %3D d. pОH %3D 1.0 e. РОН 3D 9.2 f. [H*] = 3.4 x 10$ M g. [H]…

A:

Q: Classify each element as atomic or molecular.a. neon b. fluorine c. potassium d. nitrogen

A: a. The elements that have single atoms as their naturally existing basic units are known as atomic…

Q: The total percent composition for each atom in would be:   A. 48.2% Fe, 10.4% C, 41.5% O   B.…

A: We have to calculate the total percent composition for each atom as follows in step 2:

Q: The sample is a heterogeneous mixture. The sample is a compound. The sample is a pure element. The…

A: Solution has been provided in Step 2.

Q: mass percent

A:

Q: + Al(NO3)3 a. Al2(SO4)3 + Ba(NO3)2 b. Ca(C2H3O2)2 + K3PO4 BaSO4 Ca3(PO4)2 + KC2H3O2

A: Answer - Balanced equation - Balanced equations are those whose coefficients result in equal numbers…

Q: 2 NH 3(g) - N2g) + 3 H 2(g) IN2][H2]1/3 [NH 3]1/2 [NH 316 K [N21°H219 [NH 312 K [N2][H213 [N2][H2]3…

A: The equilibrium constant is the ratio of the molar concentration of the reactants to the products…

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.