A sample of iron sulfide is found with the formula Feo.87S. What percentage of the iron ions are Fe(ll) in this compound? A. 26% B. 30% C. 61% D. 70%

Q: A. Na2S+CaCl2 CaS + Na → C. Zn(s) + H₂SO4 → ZnSO4+H2 1 B. Cu (g) → Cu²(g) + le D. Cu(g) → Cu¹*(s) +…

A: Ionization energy (EI): When an electron is removed from the outermost shell of an isolated gaseous…

Q: D. _KCIO3(S)---> _KCI(aq)+ _02(g) E. Fe203 (s) + _H2O(I)---> _Fe(OH)3 (s) F. Ca(OH)2 (aq) +_HNO3…

A: In a balanced chemical equation, the number of moles of each atoms on both sides of the equation is…

Q: D Br O 1) LIAID4, diethyl ether; 2) D20 1) HOCH2CH2OH, H*: 2) Mg, THF; 3) D20; 4) H3O* O 1) Mg, THF;…

A: In the given reaction the carbonyl carbon is an active centre for reaction, and hence it needs to be…

Q: What is a chemical bond? Explain the difference between an ionic bond and a covalent bond.

A:

Q: Balance the following equations:

A: Since we only answer up to 3 subparts, we will answer the first three subparts only. Please resubmit…

Q: A sample of an iron alloy contains 90.2 g Fe, 2.15 g C, and 1.01 g Cr. Calculate the percent by mass…

A: Total mass of the alloy = mass of Fe + mass of C + mass of Cr = 90.2 + 2.15 + 1.01 = 93.36 g

Q: When magnesium ribbon is burned inside dry ice slabs (carbon dioxide), black specks (carbon) and…

A:

Q: The figure (Figure 1) shows the reaction of element A (lavender spheres) with element B (tan…

A:

Q: Draw the structure of the reactant that produces the molecules shown for each of the following…

A:

Q: 11. A 3.75 g sample of pyrite (FeS2) contains 1.75 g of iron. What are the percentages of iron and…

A: We know that the general formulas for the percentage of constituent elements in the samples as…

Q: 9) 2Mn(NO,); + 5NaBiO, + 16HNO, → 2HMNO, + 5Bi(NO,), + 5NANO, + 7H;O 10) 4H;C,04+ 2KMNO, → 8CO, +…

A: Oxidation describes the loss of electrons by a molecule, atom or ion. Reduction describes the gain…

Q: Aluminum has a density of 2.70 g/cm3 and molar mass of 26.98 g/mol. Its atomic radius is 143 x 10 –…

A: Answer:

Q: Identify the oxidizing and reducing agents in the following:

A: The oxidizing agent and reducing agent in the chemical reactions has to be identified. (a) The given…

Q: KiPO. Al(CN), Mg(SCN) Zn(OH).

A: Since you have posted a question with multiple subparts, we will solve the first three subparts for…

Q: ¿ A 1. Me3S I, NaH, THF 2. NaN3, DMF, heat 3. PCC, CH₂Cl₂ N3 N3 OH "Z" a 3 d. N3 B ? C D

A:

Q: 26. ZnF, - 27. CCI, - 28. SeH, - 29. Al(OH), - 30. K,O -

A: We have to name these inorganic compounds.

Q: 29) What is the mass of 0.100 moles of Lithium? A) 0.649 B) 6.49 C) 12.98 D) 3.45 30) Which of the…

A: 29) The mass of 0.100 moles of Lithium can be calculated as - This is the correct answer but…

Q: d. Cl2 FeCla Br е. SO3 H,SO4

A:

Q: 4. K2Cr20, + KI + H3PO4 I2 + CIPO4 + K3PO4 + H20 5. K,Cr,0, + Fes04 + H2S04 - Cr2(S04)3 + Fez(SO4)3…

A: The oxidation state method tells about the number of electrons present in the reaction. Half…

Q: T1,O pyridine BH в A C Cul, Pd(PPh,), Br Br Pd(PPh,) NaOEt Pd(OAC), PPh,. NEt, E D

A:

Q: What are the products of the following reactions?

A: Solution:-    (a)

Q: Strontium nitrate consist of 72.8 mmol. How many pg of substance is this? The answer must be 1.54 x…

A:

Q: Balance the following equations:

A:

Q: 8. The chemical formula for water is H,O. What is the chemical formula for methane? a. O2 b. CO2 с.…

A:

Q: Why are some substances reactive and others not?

A: The arrangement of electrons in an element determines whether it will reactive or not. As we know,…

Q: 1. 8 В 2. H300 Na,Cr,07 Mg(s). →A· FeBr3 SOCI,, D H2SO, Br2 E AICI, OCH3 OCH3 H. NABH. Conc. H3PO4 G…

A:

Q: Lithium metal has an atomic radius of 152 pm. The molar mass of lithium is 6.94 g/mol and Avogadro`s…

A: Atomic radius = 152 pm = 152 × 10-10 cm  Avadagro constant = 6.022 × 1023  per mol  Molar mass of…

Q: Use the standard entropy data to determine the change in entropy for each of the reactions listed in…

A: Note - Since you have posted a question with multiple sub-parts, we will solve first three sub -…

Q: 25. XF2 is the chemical formula of a salt. The X-ion in this salt has 26 electrons. The metal X is…

A:

Q: Mass of Crucible and Cover= 62.17 g Mass of ……… and solid hydrate= 63.28 g Mass of ………. And residue=…

A: Note - Since you have posted a question with multiple sub-parts, we will solve the first three…

Q: Chlorine gas easily gains two electrons to form two chloride ions. In this process, chlorine is

A: Oxidizing agent is the substance which has the tendency to oxidize others and reduce itself .

Q: A sample of an iron alloy contains 87.7 g Fe, 2.60 g C, and 1.52 g Cr . Calculate the percent by…

A: Calculate the percent by mass of each component present in the alloy sample.

Q: i. Br20) + OH → BrO, + Br + H,O Al + Sn+4 → Al+3 + Sn*2

A: Redox reaction is a reaction in which oxidation and reduction occur simultaneously. the gain of the…

Q: You are making an alloy of tantalum (Ta) with an atomic weight of 180.94788 g/mole and magnesium…

A: Molar mass of tantalum = 180.94788 g/mole  Molar mass of magnesium = 24.3050 g/mole  Given mass of…

Q: a. Al CuCl2 b. ZnO c. C3H8 + d. Ba(OH), + O2( blue flame) LizPO4 N2 е. Вe +

A:

Q: 69. This organic compound is called O ethyl alcohol O ethyl acetate O ethyl propanoate

A:

Q: How many grams of magnesium are required to produce 3.000 kg of Si? (At mass: Mg=24.31; Si=28.09)…

A:

Q: Looking to see if I have the concept right . Thank you

A:

Q: 117)In each of the fallowina sets of elements,indicate which elements shows the mast active chemical…

A: Reactivity of element is directly proportional to oxidation potential. (a) Al (b) Na (c) B Position…

Q: What is the formula of a compound containing Al³⁺ and S²⁻ ions? A) Al₂S₃ B) Al₂S C) AlS₃ D) Al₃S₂

A: The formula of a compound containing Al³⁺ and S²⁻ ions is Al₂S₃

Q: 4. HFag) 2 Agʻaq) + Znu C2Hlg + Ozia) 5. 2 Ag + Zn²*taq) 6. 2 C2Halg) + 2 H;O 7. Cu + 2 Hzig CHag 8.…

A: let us consider a general reaction, aA+bB→cC+dD The equilibrium constant for a given reaction is…

Q: Mass of crucible, lid, and magnesium oxide                                             ____19.41…

A: Given: Mass of the crucible, lid, and magnesium oxide = 19.41 g And Mass of empty crucible and lid…

Q: 1. AGNO _MgCl, AgCl Mg(NO,), 2. C.H, cO, HO 3. P,O, 4. Zn _Pb(NO,), Zn(NO,), Pb -> + 5. SiO, + HE…

A: A chemical reaction is symbolic representation of the conversion of substances to new substances. In…

Q: A 67.2 gg sample of a gold and palladium alloy contains 2.68×1023 atoms. What is the mass percentage…

A: Mass percent of an element is the ratio of its mass  in the compound to the total mass of the…

Q: Cus) Al(s) → Al2(SO4)3(aq) + CuSO4(aq) +

A: We are asked to balance the equation-  CuSO4 +  Al -----> Al2(SO4)3 +  Cu

Q: (d) O2(g)+ Sb(s) → H2 O2 (aq) + SbO, (aq)

A: At first main atom balanced.  Then O atom balanced.  Then H atom balanced.  Then HO^- addition for…

Q: the mass percent of magnesium in MgSO4.

A:

Q: 1. Determine the percentage of hydrogen peroxide in the solution sample.  2. naturally occurring…

A: Two numerical problems based on redox reaction, which is to be accomplished.

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.