(a)
Interpretation:
The chemical formula for silicon dioxide needs to be determined.
Concept Introduction:
The chemical formula is representation of number of different types of elements present in the compound.
(b)
Interpretation:
The chemical formula for ammonium carbonate needs to be determined.
Concept Introduction:
The chemical formula is representation of number of different types of elements present in the compound.
(c)
Interpretation:
The chemical formula for lead (IV) oxide needs to be determined.
Concept Introduction:
The chemical formula is representation of number of different types of elements present in the compound.
(d)
Interpretation:
The chemical formula for diphosphorous pentoxide.need to be determined.
Concept Introduction:
The chemical formula is representation of number of different types of elements present in the compound.
(e)
Interpretation:
The chemical formula for calcium iodide needs to be determined.
Concept Introduction:
The chemical formula is representation of number of different types of elements present in the compound.
(f)
Interpretation:
The chemical formula for Iron (III) nitrate needs to be determined.
Concept Introduction:
The chemical formula is representation of number of different types of elements present in the compound.
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OWLV2 FOR OXTOBY/GILLIS/BUTLER'S PRINCI
- A gaseous binary compound has a vapor density that is 1.94 times that of oxygen at the same temperature and pressure. When 1.39 g of the gas is burned in an excess of oxygen, 1.21 g water is formed, removing all the hydrogen originally present.(a) Estimate the molecular mass of the gaseous compound.(b) How many hydrogen atoms are there in a molecule ofthe compound?(c) What is the maximum possible value of the atomicmass of the second element in the compound?(d) Are other values possible for the atomic mass of thesecond element? Use a table of atomic masses to identify the element that best fits the data.(e) What is the molecular formula of the compound?arrow_forward1) A sample of blue crystals of copper (II) sulfate pentahydrate was heated to produce the copper(Il)sulfate tetrahydrate. (a) Write the chemical formulas of the copper(II)sulfate pentahydrate and copper(II)sulfate tetrahydrate. (b) Calculate mass percent of water in copper(II)sulfate pentahydrate (c) If 7.491 g of the copper (II) sulfate pentahydrate produces 6.951 g of the copper (II) sulfate tetrahydrate, how many grams of anhydrous copper(I1)sulfate could be obtained? (Cu=63.5 g/mol, S=32.0 g/mol, O=16.0 g/mol, H=1 g/mol)arrow_forward(a) List four physical characteristics of a solid metal. (b) List two chemical characteristics of a metallic element.arrow_forward
- (6) (1) (i) Cr3+ (1) U Ag+ 4. Provide the formula for each of the following cations. (a) cuprous ion (b) cupric ion (c) ferrous ion (d) ferric ion (e) plumbous ion (f) plumbic ion (g) mercurous ion (h) mercuric ion (i) stannous ion (j) stannic ion Identifying Cations in Solution 85arrow_forwardWrite balanced equations for the following reactions: (a) Hydrochloric acid reacts with calcium carbonate to form carbon dioxide and calcium chloride and water.(b) Liquid bromine reacts with solid potassium metal to form solid potassium bromide.(c) Gaseous propane 1C3H82 burns in oxygen to form gaseous carbon dioxide and water vapor.arrow_forwardWhen 25 g of lead (II) nitrate, Pb(NO3)2, is mixed with 15 g of sodium iodide in water, a reaction occurs and this produces sodium nitrate and solid lead (II) iodide. (a) Write a balanced equation for the reaction. (b) Calculate the theoretical amount of lead (II) iodide produced.arrow_forward
- Most abundant metal on the surface of the earth:(a) Iron(b) Aluminium(c) Calcium(d) Sodiumarrow_forwardWhich is correct and which is incorrect from the following sentences? Proposition True False (a) The nitrogen ions N + and oxygen O + are products of the decay of the corresponding molecules under the influence of sunlight near the earth's surface. (b) Red phosphorus is more active than white phosphorus and is therefore used in the manufacture of matches. (c) The oxidation number (a.o.) of nitrogen in all chemicals NO, NO + and NO- is +2. (d) Of the elements Al, Cl2, Na, Mg and Ca, only Na reacts with cold water to produce H2. (e) Of the two common carbon oxides, monoxide is less acidic.arrow_forwardIn 1961, scientists agreed that the atomic mass unit (amu)would be defined as the mass of an atom of 12C. Before then,it was defined as the average mass of an atom of naturally occurring oxygen (a mixture of 16O, 17O, and 18O). The current atomic mass of oxygen is 15.9994 amu. (a) Did Avogadro’snumber change after the definition of an amu changed and, if so,in what direction? (b) Did the definition of the mole change?(c) Did the mass of a mole of a substance change? (d) Before1961, was Avogadro’s number 6.021023(when considered tothree significant figures), as it is today?arrow_forward
- Write the empirical formula of the compound formed by (a) Al3+ and Cl - ions, (b) Al 3+ and O2 - ions, (c) Mg2+ and NO3 ions.arrow_forwardAmmonium dihydrogen phosphate, formed from thereaction of phosphoric acid with ammonia, is used as a cropfertilizer as well as a component of some fire extinguishers. (a) What are the mass percentages of N and P in the com-pound? (b) How much ammonia is incorporated into 100. g ofcompound?arrow_forwardWrite a balanced chemical equation for each reaction.(a) the reaction between potassium metal and bromine gas(b) the reaction between rubidium metal and liquid water(c) the reaction between gaseous chlorine and solid iodinearrow_forward
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