Concept explainers
Interpretation:
In the
Concept Introduction:
The coefficients that are present in a balanced chemical equation is like subscripts in the chemical formula. These coefficients can be interpreted in two levels. One is a microscopic level and another is macroscopic level.
Microscopic level:
The coefficients that are present in a balanced chemical equation gives numerical relationship between the formula units consumed or produced when a chemical reaction takes place.
Macroscopic level:
In a balanced chemical equation, the coefficients give information about the fixed molar ratios among the substance that is consumed or produced when a chemical reaction takes place.
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General, Organic, and Biological Chemistry
- The following balanced equation represents a reaction between the acid HCl and solid limestone (CaCO3). What is the formula of the substance that goes in the blank?2HCl + CaCO3 → _______ + CO2 + H2O a. H2CO3 b. CaCl 2 c. Ca d. CaH 2 e. no correct responsearrow_forwardC2H4 (colorless) + I2 (violet) → C2H4I2 (colorless) + heat An equilibrium is established in the reaction above. What change would ber observed in the appearance of the quilibrium mixture if a catalyst was added? a. no change would be seen b. the violet color of the mixture would become lighter c. the violet color of the mixture would become darker d. no correct responsearrow_forwardIn which of the following unbalanced equations are five moles of reactants required to produce two moles of products? Na + N2 --> NaN3 O Al + S --> A12S3 O N2 + H2 --> NH3 O more than one correct responsearrow_forward
- What symbol should appear in the blank to correctly complete the following equation?________ + 0-1e ---> 4119K a. 41 20 Ca b. 41 21 Sc c. 41 20 K d. 39 18 Ar e. no correct responsearrow_forwardPractice Question 11 Get help ansV Your answer is partially correct. Try again. HCI OH Edit CH3 llClick on the drawing box above to activate the MarvinSketch drawing tool a then draw Vour this question. If there is no react 93% ere to search F9 F10 F12 F6 F7 FI & @ %23 7 8. 3 4 T Y U F G H J K L D M C この B 近 >arrow_forwardWhat symbol should appear in the blank to correctly complete the following equation?23592U + 10n ---> ________ + 8735Br + 310n a. 146 57 La b. 147 57 La c. 148 57 La d. 146 56 Ba e. no correct responsearrow_forward
- Exercise 2: C₂ Calculate the difference between the heat of reaction at constant volume and the heat of reaction at constant pressure in the following two cases : 0°0 a) at a temperature f C₂H50H ( +30 2697 - 2002099 +31₂0157 b) at a temperature of 25°C C2H50th 197 + 30% - 2009) + 3 H₂O (1) Please answer the following question step-wise showing. detailed explanations. Thanks in advanced !!! MS.arrow_forwardA solution is prepared by mixing 25.0 mL of 0.34 M NH3 (pkp=4.74) and 21.0 mL of 0.95 M HCN (pKa-9.21). What is concentration of HCN at equilibrlum gven the reaction below? NH3 (aq) + HCN (aq) NH4 (aq) + CN (aq) Numeric Responsearrow_forwardElhane is a very combustible gas. Write a balanced equation for the complete oxidation reaction that occurs when ethane (C,H) bums in nir. Use the suunllest possible integer coellicients. + Submit Answer Try Another Version 3 item attempts remainingarrow_forward
- Which of the following chemical formulas fits the description number of elements present and number of atoms present are the same? a. HClO2 b. C2H2Cl2 c. H2O2 d. no correct responsearrow_forwardWhen the following molecular equation is balanced using the smallest possible integer coefficients, the values of these coefficients are: Cl2 (g) + H20 (1) – HCI (aq) + |HCIO3 (aq) Submit Answer Try Another Version 9 item attempts remainingarrow_forwardFor the reaction 2Na + 2H2O --> 2NaOH + H2 How many moles of H2 are produced from 3.36 moles of H20 ? Your Answer: Answerarrow_forward
- General, Organic, and Biological ChemistryChemistryISBN:9781285853918Author:H. Stephen StokerPublisher:Cengage LearningOrganic And Biological ChemistryChemistryISBN:9781305081079Author:STOKER, H. Stephen (howard Stephen)Publisher:Cengage Learning,