It is often necessary to do calculations using scientific notation when working chemistry problems. For practice, perform each of the following calculations. 1.00 x 10-8 +1.54 x 10-4 2.68 x 104 +9.67 × 105 5.49 × 104 = 6.40 x 10-5 (1.00 × 10-8) (1.54 × 10-4) Submit Answer Retry Entire Group 9 more group attempts remaining

It is often necessary to do calculations using scientific notation when working chemistry problems. For practice, perform each of the following calculations. 1.00 x 10-8 +1.54 x 10-4 2.68 x 104 +9.67 × 105 5.49 × 104 = 6.40 x 10-5 (1.00 × 10-8) (1.54 × 10-4) Submit Answer Retry Entire Group 9 more group attempts remaining

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter3: Chemical Reactions

Section: Chapter Questions

Problem 3.BCP

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The carbon dioxide exhaled in the breath of astronauts is often removed from the spacecraft by reaction with lithium hydroxide 2LiOH(s)+CO2(g)Li2CO3(s)+H2O(l) Estimate the grams of lithium hydroxide required per astronaut per day. Assume that each astronaut requires 2.50 103 kcal of energy per day. Further assume that this energy can be equated to the heat of combustion of a quantity of glucose, C6H12O6, to CO2(g) and H2O(l). From the amount of glucose required to give 2.50 103 kcal of heat, calculate the amount of CO2 produced and hence the amount of LiOH required. The H for glucose(s) is 1273 kJ/mol.
Consider the reaction 3X + 2Y→ 5C + 4D How many moles of X are needed to produce 24.00 moles of D? If your answer is not a whole number, answer to the hundredths place.
Write the chemical name of the compounds and balance the reaction. _CH4 +. _02→ _CO2 + _H20
When answering this problem, report the answer with the appropriate number of significant figures. When entering units, use proper abbreviated units with proper capitalization. A student followed the procedure in this experiment, using 48.92 mL of 1.00 molar HCl and 51.08 mL of 1.00 molar NaOH. Analysis of the collected data resulted in a heat transfer of 2808 J during reaction. Use this information to determine the heat of neutralization for this reaction in kJ/mol. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: ___________*10___ Units______
Balance the chemicalequation _Zn (s) + _ HCl (aq)------> _ZnCl2 (aq) + _ H2 (g) identify the chemical reaction _BaCl2(aq) +_Na2SO4(aq)----->_BaSO4 (s) + _NaCl (aq) identify the chemical reaction
When answering this problem, report the answer with the appropriate number of significant figures. When entering units, use proper abbreviated units with proper capitalization. A student followed the procedure in this experiment, using 48.92 mL of 1.00 molar HCl and 51.08 mL of 1.00 molar NaOH. Analysis of the collected data resulted in a heat transfer of 2808 J during reaction. Use this information to determine the heat of neutralization for this reaction in kJ/mol. Note: Your answer is assumed to be reduced to the highest power possible. Answer: ______x10 ___power____unit
Enter the expression ¹4N+a, where a is the lowercase Greek letter alpha. Express your answer as a chemical expression. 0 ΑΣΦ ISI ? A chemical reaction does not occur for this question.
Consider the reaction 3X + 2Y→ 5C + 4D How many moles of C can be synthesized from 32.0 moles of Y and excess X?
Balance the chemical equation below using the smallest possible whole number stoichiometric coefficients. Si,H1, () + 0,(g) → Si0,(s) + H,0(1) O-O Continue
Balance the following equations. (Use the lowest poscitie coefficients for all reactions.) Al + Fes O4 Al 03 + Fe Al + Fes O4 Al2 Os + Fe Naz0 + H20 NaOH Naz0 + H2O NaOH
The compound magnesium acetate, Mg(CH3COO)2 is soluble in water. Write the net ionic equation for the dissociation reaction that occurs when solid magnesium acetate dissolves in water:Be sure to specify states such as (aq) or (s). The compound iron(II) nitrate, Fe(NO3)2 is soluble in water. Write the net ionic equation for the dissociation reaction that occurs when solid iron(II) nitrate dissolves in water:Be sure to specify states such as (aq) or (s).
Balance the following equations. (Use the lowest possible whole-number coefficients. These may be zero.) (a) Fe(CN) 6³ (aq) + N₂H5+(aq) ⇒ Fe(CN) 6+ (aq) + N₂(g) Fe(CN)6³- + (b) Clo (aq) + I₂(s) ⇒ Cl(aq) + 103 (aq) clo Cro₂²- + N₂H5+ + I₂ + Tl₂O3 + (c) Cro4² (aq) + C₂04² (aq) = Cr(OH)3(s) + CO₂(g) C₂04²- + H+ (d) Tl₂O3(s) + NH₂OH(aq) TIOH(s) + N₂(g) NH₂OH + H+ + OH + H₂O= OH + H₂O = H₂O= H₂O= Fe(CN) 64- 103 + Cr(OH)3 + TIOH(s) + N₂ CO₂ + N₂ + H+ + H₂O OH + OH + H₂O H₂O H₂O

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