If there … In many cases, the molecular formula is the same as the empirical formula. Practice. Molecular Weight: 194.19 g/mol: Computed by PubChem 2.1 (PubChem release 2019.06.18) XLogP3-0.1: Computed by XLogP3 3.0 (PubChem release 2019.06.18) Hydrogen Bond Donor Count: 0: Computed by Cactvs 3.4.6.11 (PubChem release 2019.06.18) Hydrogen Bond Acceptor Count: 3: Computed by Cactvs 3.4.6.11 (PubChem release 2019.06.18) Rotatable Bond Count: 0 % Progress . A) Na + N2 → NaN3. This indicates how strong in your memory this concept is. (b) BiPO4, is the correct formula, its name is bismuth phosphate. Which of the following formulas is not correct? Molecular formulas give the kind and number of atoms of each element present in the molecular compound. (a) NaSO 4 (b) CaPO 4 (c) ZnS (d) AlSO 4. (a) Write the chemical formula of hydrated copper sulphate and anhydrous copper sulphate. Give their correct symbols. Is there an error in this question or solution? An empirical formula tells us the relative ratios of different atoms in a compound. A bonding molecular orbital has more energy than the original atomic orbitals. Giving an activity to illustrate how these two are inter convertible. Group the following in linear and non-linear molecules: H 2 0, HOC1, BeCl 2 C1 2 0. 19. The correct chemical formula of (iv) is Na 2 S Formula: BiPO 4 . A chemical formula represents the composition of a molecule of the substance in terms of the symbols of the elements present in the molecule. Chemical formula of compound – CO 2 for water. One molecule of hydrogen element contains two atoms of hydrogen, therefore, the formula of hydrogen is H 2 . eddibear3a and 37 more users found this answer helpful. What is the correct chemical equation for the following statement? An element X has a valency 1. The following four labels can be used: (g) for gaseous compounds (l) for liquids (s) for solid compounds (aq) for an aqueous (water) solution Q47. How to write chemical formulae and what they represent about the substance. The chemical formula will always be some integer multiple (\(n\)) of the empirical formula (i.e. SolutionShow Solution. (i) Write the chemical formula of its phosphide. H 2 is a molecular formula; it represents a diatomic molecule of hydrogen, consisting of two atoms of the element that are chemically bonded together. Which of the following statements is TRUE? The molecular formula is the representation of the actual whole number ratio between the elements of the compound. Subscripts after element symbols represent the number of atoms. (3) One mole of N2O4 contains six moles of atoms. molecular formula represent a molecule. Correct the following statement: A molecular formula represents an element. 6.23 e A mole of a chemical substance represents. (iii) Bond strength of N2 is maximum amongst the homonuclear diatomic molecules belonging to the second period. The correct chemical formula is BiPO 4. In photosynthesis, 6 molecules of carbon dioxide combine with an equal number of water molecules through a complex series of reactions to give a molecule of glucose having a molecular formula C6H1206. Q48. you can never change the subscripts of any chemical formula. The molecular formula expresses information about the proportions of atoms that constitute a particular chemical compound, using a single line of chemical element symbols and numbers. Molecular weight: Molecular formula: 1: Acetic acid: 60.052 g/mol: CH 3 COOH: 2: Hydrochloric acid: 36.458 g/mol: HCl: 3: Sulfuric acid 98.072 g/mol: H 2 SO 4: 4: Acetate: 59.044 g/mol: CH 3 COO – 5: Ammonia: 17.031 g/mol: NH 3: 6: Nitric acid: 63.012 g/mol: HNO 3: 7: Phosphoric acid: 97.994 g/mol: H 3 PO 4: 8: Sodium phosphate: 119.976 g/mol: Na 3 PO 4: 9: Calcium carbonate: 100.086 g/mol: CaCO 3: … heart outlined. The constituent elements are represented by their chemical symbols, and the number of atoms of each element present in each molecule is shown as a subscript following that element’s symbol. The empirical formula and molecular formula of a given compound are always the same. b) Avogadro’s number of grams of that substance. Sol: (b) The electronic configuration of C represent chlorine. (1) The molar mass of an element, in the solid state, has the same numerical value as the element's atomic mass. Which of the following symbols of elements are incorrect? This step-by-step tutorial shows how to calculate the empirical and molecular formulas for a compound. Write the formulae of the following compounds. (d) CO and Co both represent cobalt. The correct chemical formula of (i) is CaCl, The correct chemical formula of (iii) is Na, The correct chemical formula of (iv) is Na, Which of the following represents a correct chemical formula? The use of chemical symbols and subscripts to represent elements in a compound. The chemical formula of an element is a statement of the composition of its molecule in which symbol tells us the element and the subscript tells us how many atoms are present in one molecule. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students. The correct chemical formula of (i) is CaCl 2 . Report Error. This is done by placing the correct label on the right hand side of the formula. (a)CaCl. The following diagram represents a chemical reaction in which the red spheres are oxygen atoms and the blue spheres are nitrogen atoms. B) The subscripts represent the relative mass of each type of atom in the compound. (b) Write a balanced equation for the reaction. Both the ions are divalent i.e. (c) Is the diagram … A. (c) NaSO 4. a) the formula mass of that substance expressed in atomic mass units. Answer: The formula (c) represents the correct formula. heart. - Chemistry. Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. (d) NaS. One Line Answer. The ratios hold true on the molar level as well. Q46. e) no correct response. d. When balancing a chemical equation. The empirical formula of a chemical compound is a representation of the simplest whole number ratio between the elements comprising the compound. The state (phase) of compounds can be expressed in the chemical equation. MEMORY METER. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ … Use the data given in the table following. B. Which of the following contains maximum number of molecules . Chemical formula of element – O 2 for hydrogen. The molecular formula is an expression of the number and type of atoms that are present in a single molecule of a substance. A) MgSO 3 B) Ba(NO 3) 2 C) NaS D) KCl E) NH 4 I 15. ... Molecular Formula. 4Na + O2 = 2Na2O. Zn 2+ and S 2-. (2) In a balanced chemical equation, the number of reactants must equal the number of products. atoms and molecules. Which of the following statement is not correct from the viewpoint of molecular orbital theory? Which of the following represents a correct chemical formula? (e) Formula of iron (III) oxide is FeO. Name it. What is meant by: (a) Molecular mass (b) Chemical formula (c) Mole. E) All of the statements are true The formula of a compound is, thus, expressed by the symbols of chemical elements If there is more than one atom of this element in the molecular formula, use a numerical prefix to indicate the number of atoms, as listed in Table 3.4 “Numerical Prefixes Used in Naming Molecular Compounds”. Which of the following represents a correct chemical formula? Electrons placed in antibonding orbitals stabilize the lon/molecule. Correct the Following Statement: a Molecular Formula Represents an Element. The molecular formula of the compound formed from B and C will be (a) BC (b) B2C D) Different compounds made of the same elements have different subscripts. Stable form of C may be represented by the formula (a) C (b) C2 (c) C3 (d) C4. (i) Be2 is not a stable molecule. Which of the following represents a correct chemical formula? If the submission is a reaction and the reagents/products are correct but the coefficients are not in the correct ratio, give the penalized response: "Your answer is not a balanced chemical equation". Mark all that are correct. (b) Molecular formula of water is H2O2. (b) Write chemical names and formulae of plaster of paris and gypsum. (b) BiPO 4. 23. excellent. C) The subscripts do not change for a given compound. The correct equation is . Which of the following correctly represents 360 g of water ? Na 3 N. The correct chemical formula among the listed chemicals is of Na 3 N. Concept: Writing Chemical Formulae. A) NaOH sodium hydroxide B) Fe 3 SO 4 iron(III) sulfate C) HCl hydrogen chloride D) CaBr 2 calcium bromide E) Mg 3 N 2 magnesium nitride 16. Thus, H 2 O is composed of two atoms of hydrogen and 1 atom of oxygen. c) the mass of that substance that will combine with 1.00 gram of carbon. Write the chemical formulae of following compound. 11. Sodium reacts with oxygen in a 2 to 1 ratio to produce sodium oxide.. Which of the following represents the correct chemical formula? For example, a molecule of water contains two hydrogen atoms and one oxygen atom. Elements X, Y and Z have 4, 5 and 7 valence electrons respectively, (i) Write the molecular formula of the compounds formed by these elements individually with hydrogen, (ii) Which of these compounds will have the highest dipole moment? In a chemical equation, the reactants are on the right and the products are on the left. muskan360. Name it. Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. What rules are to be kept in mind while writing a chemical formula? `(i) NaSO_(4), (ii) CaPO_(4) (iii) ZnS (iv) AlSO_(4)` Doubtnut is better on App Paiye sabhi sawalon ka Video solution sirf photo khinch kar Empirical Formulas. 14. Two Compounds having different percent compositions of the same two elements are not the same compound. Which of the following is not the correct chemical formula for the compound named? e. In chemical reactions, matter is neither created nor destroyed so a chemical equation must have the same number of atoms on both sides of the equation. (a) CaCl (b) BiPO4 (c) NaSO4 (d) NaS, Write the chemical formula using criss-cross method: (a) Ammonium sulphate. (a)CaCl (b) BiPO4 (c) NaSO4 (d) NaS. The correct chemical formula of (iii) is Na 2 SO 4 . d) more than one correct response. Name it. integer multiples of the subscripts of the empirical formula). 2. Thanks 23. star. (c) A molecule of sulphur is monoatomic. Give the chemical formulae for the following compounds and compute the ratio by mass of the combining elements in each one of them. The correct chemical formula of (i) is CaCl2, The correct chemical formula of (iii) is Na2SO4, The correct chemical formula of (iv) is Na2S. Abond order of O represents a stable chemical bond. a.) Which one of the following statements is correct? A) The subscripts represent the relative number of each type of atom in the compound. e) no correct response Complete the following crossword puzzle (Figure) by using the name of the chemical elements. Name it. (ii) He2 is not stable but He2+ is expected to exist. Q15. It is also known as molecular formula. b) The chemical formula of a molecule changes in different isomers of the molecule such as glucose and fructose sugars. Example: user submits when the correct … Which of the following represents the correct chemical formula ? The name of the compound is zinc sulphide. Correct the following statements (a) A molecular formula represents an element. Name it. which of the following statements regarding empirical formulas molecular formulas and percent composition is correct? ... what compound formula is made with SO42- and Pd2+? elements present in the compound and what is the number of atoms of one element that combine with a definite number of atoms of the other element. A) All three statements … Which of the following statements about Rutherford’s model of atom are correct ? It represents the actual formula of a molecule. The expression 2H, on the other hand, indicates two separate hydrogen atoms that are not combined as a unit. Do not use the prefix mono- if there is only one atom of the first element. Q16. 33. a) The chemical formula of a molecule describes the position of attachment of atoms within a three-dimensional molecule. C. The empirical formula and molecular formula of a given … (a) Write the chemical formulas for the reactants and products. Its stable form is dichlorine (Cl2), i.e., C2. How to solve: Give the correct chemical formula or symbol for each of the following ions. It is represented by the formula H 2 O . Which of the following represents a correct chemical formula? Begin the name with the element name of the first element. Question 20. Example: user submits co2 when the correct answer is CO2. ... NONE are correct.
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