If the formula of an oxide of element X is X₂03, what is the formula of the chloride of X? (A) XC13 (B) XCI (C) X3CI (D) XCI6 B C D

Q: Indicate the physical state for each of the following elements at 25 °C and normal pressure.…

A: There are three physical state of matter; solid, liquid and gas.

Q: what is the precent mass of oxalat in (K3Fe(C2O4)3·3H2O, 491.3 g/mol)?

A:

Q: Write the balanced chemical equation for the reaction of these pairs of reactants: (a) Calcium and…

A: a) Ca + Br2 = CaBr2 . b) 4Al + 3O2 = 2Al2O3

Q: In 1961, scientists agreed that the atomic mass unit (amu)would be defined as the mass of an atom of…

A: Yes, the Avogadro number is changed and now becomes bigger than previously. Yes, the definition of a…

Q: Turquoise, CuAl 6 ( P O 4 ) 4 ( OH) 8·5 H 2 O(s), is one of the most valuable non-transparent…

A: Calculate molar mass of both hydrated and anhydrous form of the mineral and then calculate the mass…

Q: Which is correct and which is incorrect from the following sentences? Proposition True False (a) The…

A: The solution is shown below

Q: Is the decomposition of CuSO4· 5 H2O a physical or a chemical change? Why?

A: The copper sulfate penthydrate dehydrates to form the clear, anhydrous copper sulfate.

Q: (a) List four physical characteristics of a solid metal. (b) List two chemical characteristics of a…

A: PHYSICAL CHARACTERISTICS: The properties of elements or compounds noticed without any change in the…

Q: Ammonium dihydrogen phosphate, formed from the reaction of phosphoric acid with ammonia, is used as…

A:

Q: Write the name of each of the following substances: (W (a) (HCOO)2Ni-½H2O (b) Zn(SCN)2 (c) Ag2CrO4…

A: Note: Since you have posted multiple independent questions in the same request, we will solve the…

Q: Elemental phosphorus is used in the semiconductor industry. It can be obtained from an ore called…

A: We have to calculate the mass of fluoroapatite needed .

Q: Briefly explain each of the following: (a) Candela (b) Absolute zero (c) P4

A: a) Candela is the SI  basic unit of luminous intensity.It can be represented as "cd". For example,…

Q: For many years the recovery of gold—that is, the separation of gold from other materials—involved…

A: Mass relationship :- In these problem ,the mass of one of the reactants/products is to be calculated…

Q: For many years the recovery of gold—that is, the separation of gold from other materials—involved…

A: a.

Q: A gaseous binary compound has a vapor density that is 1.94 times that of oxygen at the same…

A: Given data contains, Vapor density of gaseous binary compound is 1.94. Weight of the gas is 1.39g.…

Q: 2. Balance the following equations by supplying the lowest whole numbers for w, x, y, and z: (a) w…

A: Since, Balanced reaction means that both side number of atom present in equal number. Thus,

Q: A sample of calcium nitrate crystal hydrate with its mass of 1.1808 g was heated at 150oC resulting…

A:

Q: write a balanced chemical equation

A: Chemical reactions can write in equation form , left side reactants and right side products and…

Q: Chrom ium metal reacts with oxygen to give chromiu m(III) oxide, Cr2O3. (a) Write a balanced…

A: A balanced equation for the reaction has to be given.

Q: what is the mass percentage of water in Zn(NO3)2*6H2O?

A: Mass percentage of water = Mass of waterMass of Zn(NO3)2.6H2Ox100There are total six water molecule…

Q: What is the molar mass of the sodium alum salt, KAl(SO4)2 •12H2O?

A:

Q: 7. Balance the following equations: a) For the synthesis of urea, a common fertilizer CO2(g) +…

A: Balancing of reactions

Q: Using a mass of 0.63 g baking soda you started with initially, calculate the mass (g) of solid…

A:

Q: A 67.2 g sample of gold and palladium allo contains 3.40x10^23 atoms. What is the mass percentage of…

A: Given : Mass of sample = 67.2 gAnd total number of atoms = 3.44 X 1023 atomsAssuming the moles of…

Q: A 5.000 gram sample of MnB4O7·•8H2O is heated to drive off the water. What is the mass of the…

A:

Q: When 25 g of lead (II) nitrate, Pb(NO3)2, is mixed with 15 g of sodium iodide in water, a reaction…

A:

Q: 2.43 g magnesium was completely burnt in oxygen to give magnesium oxide. 2 Mg(s) + O2(g) → 2 MgO(s)…

A: Answer: This question is based on the stoichiometric calculation from the chemical equation.

Q: Which statement about the properties of barium chle and mercury(II) chloride is correct? (A) BaCl₂…

A: Greater the electronegativity difference, greater will be the ionic character of the bonds between…

Q: 1)Describe the PHYSICAL PROPERTIES of the following substances? 2)Specifically, what type of…

A: Physical properties of following substances. 1. Halogen : Halogens are non metals. Fluorine and…

Q: A sample containing Al2O3 and Na2Cr2O7.2H2O was brought into the laboratory for analysis. The…

A:

Q: What is the molecular weight of Cr(NO3)3 ?

A: Mass of chromium is 51.9961 uMass of nitrogen is 14.0067 uMass of oxygen is 15.999 u

Q: (c) Argon d) Fluorine 6. The number of nonmetal atoms in Al2(SO4)3 (a) 2 15 (b) (c) 12 (d) 8 7.…

A: The non-metals present in given compound are Sulphur and Oxygen atoms.

Q: What is the mass percent of aluminum in Al(NO3)3 • 9H2O?

A: The compound given is Al(NO3)3•9H2O.

Q: 1.00 g of hydrated potassium carbonate, K2CO3•nH2O, is heated to 250 °C to give 0.836 g anhydrous…

A:

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.