A sample of cesium metal reacted completely with water, evolving 2.028 mmol of dry H 2 at 19 degrees C. What is the equation for the reaction? What was the mass of ceslum in the sample? (mmol means milli moles)

Q: Periodic Table of the Elements CI Mn Te I Xe lodine would have chemical properties most like which…

A: This is the long form of the periodic table which consists of horizontal rows called periods and…

Q: An element reacts with oxygen to form an oxide which dissolves in dilutehydrochloric acid The oxide…

A: The oxide form of an element in HCl turns red litmus to blue. This gives clear picture that given…

Q: Which element is a main-group metal? (a) O (b) Ag (c) P (d) Pb

A: a) O (b) Ag (c) P (d) Pb

Q: Why is chlorine a halogen

A: Given question is : Why is chlorine a halogen = ?

Q: In what physical state does chlorine exist at −65°C?

A: The physical state of an element depends upon its boiling point and melting point temperatures.

Q: Write the balanced chemical equation for the reaction of solid potassium with liquid water?

A: Given: Reaction of solid potassium with liquid water.

Q: 1 B,0, + 3 Mg → 3M9O + 2 B 5. (a) How many grams of boron can be obtained from 10.00g of B,0,? (b)…

A: Given balanced equation is as follows. 1B2O3+3Mg→3MgO+2B

Q: Which one has the largest atomic radius?

A: Atomic radius is the distance from the centre of nucleus to the outermost shell of an atom. In a…

Q: Write the electron configuration of sulphur using the Aufbau principle?

A: The electron configuration of sulphur ( S1632 ) :  Total number of electrons in a S atom = 16 1s2…

Q: When a nonmetal oxide reacts with water, it forms an oxoacid with the same oxidation number as the…

A: Hi, since you have posted questions that has multiple subparts. We will answer the first three…

Q: When a nonmetal oxide reacts with water, it forms anoxoacid with the same nonmetal oxidation state.…

A: Since there are multiple sub-parts in the question , only the first 3 sub-parts of the question are…

Q: Explain the organization of an atom of carbon.

A: The protons, neutrons, and electrons are the salient features of an atom. The protons present in the…

Q: Write the formula of the acid formed when each of these acidic oxides reacts with water. 1. Cl,0, 2.…

A:

Q: Small daily doses of lithium carbonate taken orally are often given to treat manic-depressive…

A: Given compound is lithium carbonate. The formula of lithium carbonate is given below:

Q: What are the physical properties of mercury?

A: Physical properties of mercury :  Physical properties of mercury is given by following – Mercury is…

Q: The 18O:16O abundance ratio in some meteorites is greater than that used to calculate the average…

A: The average atomic mass formula is given as: Average atomic mass=∑i=1n(Atomic mass of an isotope x…

Q: (a) The electrostatic force (not energy) of attraction betweentwo oppositely charged objects is…

A:

Q: How can iodine (Z=53) have a higher atomic number yet alower atomic mass than tellurium (Z=52)?

A: lodine (Z=53) has a higher atomic number than tellurium (Z=52). But the atomic mass of iodine is…

Q: Write the balanced chemical equation for the reaction of solid lithium with liquid water?

A: Lithium reacts intensely with water, forming lithium hydroxide and highly flammable hydrogen. The…

Q: OWLV2 | Online teaching and lea: X O Periodic Table Bb Intellectual and Industrial Revolu X…

A:

Q: 2. Which statement about silicon is false? It is a metalloid. b. It behaves as a semiconductor when…

A: Silicon is p-block element with atomic number 14 and symbol is Si

Q: Hypothetical elements X and Y form a molecule XY2, in which both Y atoms are bonded to atom X (and…

A: X-Y distance in the molecule XY2 will be 186 pm.  Bond length of any molecule is given by the…

Q: what are 2 incompatible elements? are calcium and chlorine incompatible?

A: Rubidium, Barium, Uranium, and Lanthanum are incompatible elements.

Q: What is the electron configuration of Ar (argon)?

A:

Q: What do the elements sulfur (S), nitrogen (N), phosphorus (P), and bromine (Br) have in common? A.…

A: The elements Sulfur(S), nitrogen(N), phosphorus(P), and bromine(Br) all situated on the right-hand…

Q: What is the chemical formula for sodium perchlorate?

A: The chemical formula - It is the representation of the chemical composition  of the compound

Q: Among Cl-, Ar, K+, Ca2+, Br-, Kr, Rb+, and Sr2+, which one has the largest radius?

A: Isoelectronic species are those species which have same number of electrons in them. And the radius…

Q: Write balanced equations of the following reactions and identify the x.             1.  8034 Se…

A: In the balanced nuclear reactions, the total atomic number and the total mass number should be the…

Q: 7.00 L of water vapor at 50.2 °C and 0.121 atm reacts with excess iron, how many grams of iron(III)…

A: Volume of H2O = 7.00 L  Temperature = 50.2°C  Pressure = 0.121 atm

Q: 2. A sample of argon weighing 11.1 g-oceupies a volume of 15.7 L. What is the new volume if the mass…

A: Using the ideal gas equation: PV = nRT P is the pressure, V is the volume, n is the no of moles, T…

Q: Which of the following elements would you expect to have chemical properties most similar to those…

A: on the basis of the periodic table, we can say that the elements that belong to the same group have…

Q: What is the metalloid in Period 3 on the periodic table?

A: Metalloids :-  Elements whose properties are intermediate between those of metals and non metals are…

Q: 12. A student writes the following incorrect chemical equation for the synthesis of magnesium oxide.…

A: Solving only first question in accordance with guidelines.

Q: H–B=c=o, Boron SN: Carbon SN:

A: Given molecule 1. H-B=C=O 2. O=C=B-B=C=O Steric No of B = To be determined Steric No of C = To be…

Q: Write the following reactions as indicated for the hypothetical elements, Gx and Wy.  a. EA2…

A:

Q: what is the physical state of element Pb? what is the physical appearance of element Pb? what is…

A: Physical state of element Pb is solid at room temperature. Physical appearance of element Pb is…

Q: If the radius of a potassium atom is 2.48 x 10-7 mm, how many K atoms would fit along the edges of a…

A: Since you have posted multiple questions, we are entitled to answer the first only.

Q: Write a general equation for the reaction of an alkali metal with each substance.a. a halogen b.…

A: Alkali metals are first group elements. They show a fixed valency of +1. Halides show -1 unit…

Q: Which of the following elements would you expect to have properties similar to those of barium (Ba)?…

A: Which of the given element would have a similar properties like Barium (Ba) = ?

Q: what is the physical state of element C? what is the physical appearance of element C? what is the…

A:

Q: The reaction of cesium with chlorine is similar to that of sodium with chlorine. Write the balanced…

A:

Q: List the characteristic properties of noble gases, alkali metals, halogens, and alkaline earth…

A: The characteristic properties of noble gases, alkali metals, halogens, and alkaline earth metals…

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.