The fluoride rinse in dental offices usually contains sodium fluoride. Sodium fluoride can be prepared from...
The fluoride rinse in dental offices usually contains sodium fluoride. Sodium fluoride can be prepared from the reaction between sodium metal and fluorine gas. Which properly represents the balanced chemical equation for this reaction? Na(s) + F2(g) → NaF2(s) Na(s) + F(g) → NaF(s) 7Na(s) + F(g) → Na7F(s) 2Na(s) + F2(g) → 2Na2F(s) 2Na(s) + F2(g) → 2NaF(s) Why is it important to understand this equation? What do you think could happen if this is incorrect?
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The fluoride rinse in dental offices usually contains sodium
fluoride. Sodium fluoride can be prepared from...
20) Consider the two beakers laa Beaker B contains made of la known with certainty t...
20) Consider the two beakers laa Beaker B contains made of la known with certainty t w A) Beakers A and B contain an equal volume of woms B) Beakers and contain samples with the same density C) Beakers A and B contain an equal number of atoms D) Beakers A and B contain equal masses of atoms E) None of these are correct. 21 21) Which statement correctly de atement correctly describes what is happening in the reaction shown...
20) Consider the two beakers labeled A and B. Beaker Acontains 1 mole of iron atom Beaker B contains 1 mole of lead...
20) Consider the two beakers labeled A and B. Beaker Acontains 1 mole of iron atom Beaker B contains 1 mole of lead atoms. Which statement concerning these samples known with certainty? mole of iron atoms, and 20) Beer Besker A) Beakers A and B contain an equal volume of atoms. B) Beakers A and B contain samples with the same density. C) Beakers A and B contain an equal number of atoms. D) Beakers A and B contain equal...
20) 20) Which of the following statements concerning a voltaic cell is FALSE A) At the...
20) 20) Which of the following statements concerning a voltaic cell is FALSE A) At the anode a substance will lose electrons. B) A voltaic cell uses an oxidation-reduction reaction to produce electrical energy. C) The oxidation half reaction occurs at the cathode. D) The cell consists of two half cells. E) The anode and the cathode are separated by a salt bridge. - 21) The fluoride rinse in dental offices usually contains sodium fluoride, Sodium fluoride 2 1 can...
A toothpaste contains 0.24% by mass sodium fluoride used to prevent dental caries and 0.30% by...
A toothpaste contains 0.24% by mass sodium fluoride used to prevent dental caries and 0.30% by mass triclosan C12H7Cl3O2, a preservative and antigingivitis agent. One tube contains 119 g toothpaste.a. How many moles of NaF are in the tube of toothpaste?b. How many fluoride atoms F– are in the tube of toothpaste?c. How many grams of sodium ion Na+ are in 1.50 g toothpaste?d. How many molecules of triclosan are in the tube of toothpaste?
A toothpaste contains 0.242 %% by mass sodium fluoride used to prevent dental caries and 0.31...
A toothpaste contains 0.242 %% by mass sodium fluoride used to prevent dental caries and 0.31 %% by mass triclosan C12H7Cl3O2C12H7Cl3O2, an antigingivitis agent. One tube contains 119 g of toothpaste. (Figure 1) How many fluoride ions, F−, are in the tube of toothpaste? How many grams of sodium ion, Na+, are in 1.80 g of toothpaste? How many molecules of triclosan are in the tube of toothpaste?
Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the...
Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) 1) One mole of any substance contains Avogadro's number of particles of that substance. What is the numerical value of Avogadro's number? A) 12.01 23 Avagrans t Male aton 6022 x1o atums B) 6.022 x 1023 C) 6.022 x 10-23 D) 1.661 x10-24 E) 1.00 x10-14 2) What is the mass of 4.00 moles of helium, the gas commonly used to fill...
What is the change in the internal energy of a system (delta U) if 71 kJ...
What is the change in the internal energy of a system (delta U) if 71 kJ of heat energy is absorbed by the system and 12 kJ of work is performed on system? Write a balanced thermochemical equation for the following process: If 2 mol of sodium metal reacts with 1 mol of fluorine gas at constant pressure, 2 mol of solid sodium fluoride is produced and 409.2kJ of heat is released. How much energy is released if one mole...
I just need the blank data table with all the reactions shown. I need ALL 36...
I just need the blank data table with
all the reactions shown. I need ALL 36 spaces for reacting
solutions. I don't need the observations. Please
help.
ARE hem 310 LAB EXPERIMENT #6 Chemical Reactions: Double Replacements I. OBJECTIVES 1. To perform and record observations of some chemical reactions. 2. To gain skill in writing balanced equations from observations of chemical reactions using known reactants. 3. To look for ions that, if present, may cause the compounds to be insoluble...
i uploaded everything that was given. Where would I find the experiemental values? Complete the calcula...
i
uploaded everything that was given. Where would I find the
experiemental values?
Complete the calculation summary below. READ THE EXPERIMENTAL DISCUSSION FIRST! REPORT ALL ANSWERS TO THE CORRECT SIGNIFICANT FIGURES. SHOW CALCULATION SET-UP on the next page. PART B: Molarity Determination via Solution Stoichiometry 7.625 g Mass of Empty 50 mL Beaker 7.976 g Mass of Beaker and NaCl (final heating) Mass of NaCl Produced (Experimental Yield of NaCl) moles Moles of Na,CO, Consumed 0.00500 Liter Volume of Na,CO,...
if you can't answer all ,please don't answer 1) of the reactions below, which one is...
if you can't answer all ,please don't answer
1) of the reactions below, which one is a decomposition reaction? A) Ca(NO3)2 + Na2S -- CdS +2NaNO3 B) NH4Cl- NH3 + HCI C) 2Mg + 02 - 2MgO D) 2N2 + 3H2 → 2NH3 E) 2CH4 + 402 - 2002 + 4H20 miches of - x 1? 2 2) Calculate the percentage by mass of ammonia in cisplatin, PtCl2/NH3 12. A) 12.53 B) 5.68 C) 18.09 D) 11.35 E) 4.67 3)...
20) Consider the two beakers laa Beaker B contains made of la known with certainty t w A) Beakers A and B contain an equal volume of woms B) Beakers and contain samples with the same density C) Beakers A and B contain an equal number of atoms D) Beakers A and B contain equal masses of atoms E) None of these are correct. 21 21) Which statement correctly de atement correctly describes what is happening in the reaction shown...
20) Consider the two beakers labeled A and B. Beaker Acontains 1 mole of iron atom Beaker B contains 1 mole of lead atoms. Which statement concerning these samples known with certainty? mole of iron atoms, and 20) Beer Besker A) Beakers A and B contain an equal volume of atoms. B) Beakers A and B contain samples with the same density. C) Beakers A and B contain an equal number of atoms. D) Beakers A and B contain equal...
20) 20) Which of the following statements concerning a voltaic cell is FALSE A) At the anode a substance will lose electrons. B) A voltaic cell uses an oxidation-reduction reaction to produce electrical energy. C) The oxidation half reaction occurs at the cathode. D) The cell consists of two half cells. E) The anode and the cathode are separated by a salt bridge. - 21) The fluoride rinse in dental offices usually contains sodium fluoride, Sodium fluoride 2 1 can...
Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) 1) One mole of any substance contains Avogadro's number of particles of that substance. What is the numerical value of Avogadro's number? A) 12.01 23 Avagrans t Male aton 6022 x1o atums B) 6.022 x 1023 C) 6.022 x 10-23 D) 1.661 x10-24 E) 1.00 x10-14 2) What is the mass of 4.00 moles of helium, the gas commonly used to fill...
What is the change in the internal energy of a system (delta U) if 71 kJ of heat energy is absorbed by the system and 12 kJ of work is performed on system? Write a balanced thermochemical equation for the following process: If 2 mol of sodium metal reacts with 1 mol of fluorine gas at constant pressure, 2 mol of solid sodium fluoride is produced and 409.2kJ of heat is released. How much energy is released if one mole...
I just need the blank data table with
all the reactions shown. I need ALL 36 spaces for reacting
solutions. I don't need the observations. Please
help.
ARE hem 310 LAB EXPERIMENT #6 Chemical Reactions: Double Replacements I. OBJECTIVES 1. To perform and record observations of some chemical reactions. 2. To gain skill in writing balanced equations from observations of chemical reactions using known reactants. 3. To look for ions that, if present, may cause the compounds to be insoluble...
i
uploaded everything that was given. Where would I find the
experiemental values?
Complete the calculation summary below. READ THE EXPERIMENTAL DISCUSSION FIRST! REPORT ALL ANSWERS TO THE CORRECT SIGNIFICANT FIGURES. SHOW CALCULATION SET-UP on the next page. PART B: Molarity Determination via Solution Stoichiometry 7.625 g Mass of Empty 50 mL Beaker 7.976 g Mass of Beaker and NaCl (final heating) Mass of NaCl Produced (Experimental Yield of NaCl) moles Moles of Na,CO, Consumed 0.00500 Liter Volume of Na,CO,...
if you can't answer all ,please don't answer
1) of the reactions below, which one is a decomposition reaction? A) Ca(NO3)2 + Na2S -- CdS +2NaNO3 B) NH4Cl- NH3 + HCI C) 2Mg + 02 - 2MgO D) 2N2 + 3H2 → 2NH3 E) 2CH4 + 402 - 2002 + 4H20 miches of - x 1? 2 2) Calculate the percentage by mass of ammonia in cisplatin, PtCl2/NH3 12. A) 12.53 B) 5.68 C) 18.09 D) 11.35 E) 4.67 3)...
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