18. What experiment can you use to: (a) Separate salt from water? (b) Separate iron filings from small pieces of lead? (c) Separate elemental sulfur from sugar?
Q: In one experiment 6.50 grams of salicylic acid is reacted with excess acetic anhydride. The reaction...
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Q: Please answer question and just send me the paper solutions ASAP
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Q: Consider the reaction. 2Fe2O3⟶4Fe+3O2. Δ?∘rxn=+824.2 kJ The formation of 12.0 g of O2 result...
A: 2Fe2O3 ——> 4Fe + 3O2 Heat = +824.2 kJ Clearly, this heat is released when 3 moles of O2...
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A: According to the Law of conservation of mass " all atoms of different elements must be equal on both...
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A: The products of reaction 4 are shown below,
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A: Using the concept of Relative rate we can solve this problem.
Q: How many grams of Oxygen gas are required to react with excess Hydrogen gas it 40.1 grams of liquid ...
A: Mass of 1 mol H2O = 18.02 g Mass of 1 mol O2 = 31.999 g
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Q: Find AN #1, 3, 11, and 19 that correspond to the elements in Group 1. What happens to Electronegativ...
A: Electronegativity is the tendency of an atom to attract the shared pair of electrons towards itself....
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A: Molecular equation :- The chemical equation in which reactants and products are neutral molecules is...
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Q: 6. Which of the following reactions is best represented by a double arrow because it only produces a...
A: The correct option is (B)This is because, in this both the product are soluble in aq solvent and hen...
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A: Specific heat capacity is the amount of heat required to raised the temperature by 1 oC when heating...
Q: Consider the quantum number set for the highest energy CORE electron for krypton. What is the value ...
A: n (principle quantum number) = 4. l ( Azimuthal quantum number) = 1. ( l =1 for p orbitals) ...
Q: 8. Which variables does equilibrium depend on? Mass O Temperature O volume Pressure
A: Ans All the extensive properties such as temperature, pressure and volume depends upon the equilibri...
Q: Vinegar can be assayed to determine its acetic acid content. Determine the molarity of aceticacid in...
A: Here the titration of the 15.00 mL of vinegar with 0.550 M of NaOH has been carried out. The volume ...
Q: Calcium bydroxide may be used to neutralize (completely react with) aqueous hydrochlcric acid. Calcu...
A: The balanced reaction will look like, 2HCl + Ca(OH)2 → CaCl2 + 2H2O It is given that,amount of solid...
Q: 2.) The reaction below was found to have the rate law, rate = k[A][B] 2. For EACH of the scenarios b...
A: Rate of reaction depends upon the rate law expression which is determined experimentally.
Q: Which has a larger frequency -- the 4th line of Balmer series or the 4th line of the Lyman series? P...
A: Explanation given as follows
Q: A 20.25 g sample of a substance is initially at 28.9 °C. After absorbing 2217 J of heat, the tempera...
A: Given, mass of substance = 20.25 g Q = 2217 J Initial Temperature = 28.9 °C Final temperature = 17...
Q: a piece of zn metal (25)g reacts with 100ml of a 2m hcl solution to form zncl2 and h2 gas. What mass...
A: Applying concept of limiting reagent.
Q: What is the concentration of sodium in one in 0.475 M Na2CO3?
A: Na2CO3 is an ionic compound that dissociates into sodium cation and carbonate anion in 2:1 ratio.
Q: A chemist measures the amount of nitrogen gas produced during an experiment. She finds that 4.05 g o...
A: Nitrogen gas produced 4.05 g
Q: give an example of a reaction that occurs immediately and an example of a reaction that occurs rapid...
A: Most severe allergic reactions occur within seconds or minutes after exposure to the allergen
Q: How many grams of ammonia are in a 6.61 L flask if initially:
A: To solve the problem, first, we need to find out the concentration of ammonia in the first equilibri...
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Q: 2 Naa + Clato +2 NaCl is the balanced reaction for the formation of table salt. Given 20 grams of Na...
A: The reactant which is present in excess, and even present after the reaction is called excess reagen...
Q: Please answer question and just send me the paper solutions
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Q: William Roentgen discovered alpha and beta rays. O True O False
A: The given statement is,
Q: The combustion of glucose is represented by the fallowing balanced equation: C6H12O6+6O2->6H2O+6C...
A: Using concept of limiting reagent and percentage yield.
Q: Calculate the standard molar entropy for gas phase: (a) Ar (b) I2 (c) H2O at 298 K
A: Given: Temperature= 298 K To find: Standard molar entropy of: (a) Ar (b) I2 (c) H2O Formula: ∆S°=∆Hf...
Q: What sequence of reactions would allow a conversion of an ester to an anhydride?
A:
Q: How many grams of salicylic acid must be used in order to produce 5.00 grams of acetylsalicylic acid...
A: Aspirin or Acetyl Salicylic acid is produced by reacting salicylic acid (C7H6O3) with Acetic anhydri...
Q: When the following equation is balanced, the coefficients are __________. ___Al(NO3)3 + ___Na2S → __...
A: Reactants: Al(NO3)3 (Aluminium nitrate) Na2S (Sodium sulfide) Products: Al2S3 (Aluminium sulfide...
Q: Given that a bomb calorimeter has a volume of 1.5 L and a temperature of 25.00°C, what pressure of o...
A: The chemical equation of combustion of sucrose is written as: C12H22O11 +12 O2→12CO2+11 H2O
Q: Predict the products of the reaction of the following substances with CrO3 in aqueous acid:
A: The reaction of CrO3 in aqueous acid is an organic reaction named as Jones oxidation. The CrO3 aqueo...
Q: Is 50% correct?
A:
Q: Which has a larger frequency -- the 4th line of Balmer series or the 4th line of the Lyman series? P...
A: Larger frequency among these is explained as follows
Q: Name the following molecular compounds a. CI4 b. P2I4 c. Br3O8 d. N2O3 e. BCI3 f. N2O5 g.P4O6 h.O2F2...
A: Molecular compounds are those compounds which are formed between two or more nonmetal or sometimes m...
Q: Q4. (a) What is E for the following unbalanced reaction? Al (s) + O2 (g) + 2H20 (e) → AP" (aq) + 40H...
A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and s...
Q: Please answer question and just send me the paper solutions
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Q: A particular gas has an initial pressute of 0.0728 atm and an initial volume of 18.0 L. If the press...
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A: The atoms or molecules of same or different substances are attracted to each other by forces of attr...
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A: 1 Mole=22.4ltr at STP 18.3L=0.8169 Moles
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Q: The decomposition of hydrogen peroxide as represented by the equation below follows the first-order ...
A: ANS: C 6.0 hrs FIRST ORDER t 1/2 = 0.693/k WHERE k = 3.2 x 10-5 s–1 t 1/2 = 0.693/3.2 x 10-5 s–1 t...
18. What experiment can you use to:
(a) Separate salt from water?
(b) Separate iron filings from small pieces of lead?
(c) Separate elemental sulfur from sugar?
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- 3. The radius of an atom of gold (Au) is about 1.35 A°. (a) Express this distance in nanometers (nm) and in picometers (pm). (b) How many gold atoms would have to be lined up to span 1.0 mm? (c) If the atom is assumed to be a sphere, what is the volume in cm3 of a single Au atom? (Note: unit A is angstrom).2. Explain the difference between (a) nanoscience and nanotechnology (b) nanomaterial and nanoparticleYou are given a hammer a battery, a bulb, wires and switch(a) How could you use them to distinguish between samples of metals and non metals?(b) Assess the usefulness of these tests to distinguish between metals and non-metals
- 7. Suppose you make a solution that contains 17.59 g of sodium chloride and 960 g of water. (a) What is the mass % of sodium chloride? (b) If 16.47 mL of your solution weighs 16.651 g,what is the density (in g/cc)?6.Express your answers to at least 5 significant figures. The mass of one mole of boron is 10.811 g. (a) What is the mass in u of one boron atom? answer was 10.81 (b) What is the mass in kg of one boron atom? ___x10^_____The German chemist Fritz Haber proposed paying off the reparations imposed against Germany after World War I by extracting gold from seawater. Given the following data, what was the dollar amount of the gold that could have been extracted from 3.0 m3 of seawater? The price of gold at the time was $0.68 per gram of gold. Gold occurs in seawater to the extent of 5.15 x 1011 atoms per gram of seawater. The density of seawater is 1.03 g/cm3.
- (1. On the second floor of Kent Laboratory a chemistry student in 111B finds that 15.20 g of nitrogen will react with 17.37 g, 34.74 g, or 43.43 g of oxygen to form three different compounds: (a) Calculate the ratio of the mass of oxygen to the mass of nitrogen for each compound and (b) Explain briefly how the numbers in part (a) support the atomic theory.(A)18.7g NO2 express your answer in moles to three significant figures. (B)1.88 kgCO2 express your answer in moles to three significant figures. (C) 48.8 g KNO3 express your answer in moles to three significant figures. (D) 116.2 kgNa2SO4 express your answer in moles to four significant figures.Classify the solid state of the following substances as ionic crystals, covalent crystals, molecular crystals, or metallic crystals:
- What is the mass of 4.00 cm^3 of sodium, with a density of 0.97 g/cm^3?d) Which of the following substances can be considered chemically pure? ● ● Air ● Apple juice Brass Seawater ● A bar of 24-karat gold(a) Atoms are very small compared to objects on the macroscopic scale. The radius of a aluminum atom is 143 pm. What is this value in meters and in centimeters? m cm (b) The mass of a single aluminum atom is 4.48×10-23 g. Suppose enough Al atoms were lined up like beads on a string to span a distance of 37.7 cm (15 inches). How many atoms would be required? atoms What mass in grams of Al would be used? g Could you weigh out this amount of aluminum using a typical laboratory balance? (c) Taking the density of aluminum metal to be 2.70 g/cm³, calculate the mass of metal needed to form a piece of Al wire with the same length as the distance in b, but with a diameter of 1.00 mm. Hint: The volume of a cylinder is n times its radius squared times its height. (V = n r² h) How many aluminum atoms does this represent? g atoms