Boron forms a series of compounds with hydrogen, all with the general formula By Hy. X B₂H₁ (s) + excess O₂(g) → B2O3(s) + / H₂O(g) · If 0.293 g of one of these compounds gives 0.835 g of B₂03 when burned in excess O2, what is its empirical formula? Empirical formula:

Q: What is the reagent in the solubilities of the sulfate and chromate of Barium that is used to…

A:

Q: O H 1. NaBD4, EtOH 2. H3O+

A: NaBD4 is the reducing agent reduces aldehyde and ketone to alcohol.

Q: A chemist must prepare 900.0 mL of potassium hydroxide solution with a pH of 13.50 at 25 °C. He will…

A:

Q: Find ∆Stotal (entropy change) when 100 grams of water vapor initially at 200 degrees Celsius…

A: ∆Stotal (entropy change) when 100 grams of water vapor initially at 200 degrees Celsius undergoes a…

Q: Synthesize each compound from acetylene. You may use any other organic or inorganic reagents. 1.…

A:

Q: Oxidation number of S in Na2SO3 is Answer:

A:

Q: Calculate the energy (MeV) liberated in the decay of U-238 to produce Th-234 if the mass of U-238 =…

A:

Q: 7. An ionic bond is formed between a cation A+ and anion B. How would the energy of the ionic bond…

A:

Q: reaction BH3(aq) + NH3(aq) → BH3NH₂(aq) HCN(aq) + CH3NH₂(aq) → CN (aq) + + CH3NH²(aq) H₂(g) + Br₂(g)…

A: A Lewis acid is a species that accepts a pair of electrons . A Lewis base is a species that can…

Q: Considere following data on some weak acids and weak bases: name acetic acid hydrocyanic acid 0.1 M…

A:

Q: From a 10-mL sample, a 1-mL aliquot was taken and diluted to 100mL.  From this, a 5-mL aliquot was…

A: Given that,  From a 10 mL sample, a 1 mL aliquot was taken and diluted to 100 mL.  From this, a 5…

Q: A herbicide contains 2,4-D (2,4-dichlorophenoxyacetic acid), C8 H6 Cl2 O3. A 1.265-g sample of the…

A: A question based on mole concept that is to be accomplished.

Q: 70. Consider the following. Need correct answer with explanation. and why other options are…

A:

Q: Synthesize each compound from acetylene. You may use any other organic or inorganic reagents. e.…

A:

Q: A 750.0 mL sample of 0.18 M HCIO4 is titrated with 0.27 M NaOH. Determine the pH of the solution…

A:

Q: Which of the following is NOT a chain isomer of n-hexane? O a. 3-methylpentane O b.…

A: Isomers are those structures which are different in Molecular structure but their Molecular formula…

Q: The first-order rate constant for the reaction of methyl chloride (CH3Cl) with water to produce…

A:

Q: For the decomposition of hydrogen iodide on a gold surface at 150 °C 2 HI(g) → H₂ (9)+ 1₂ (9)…

A: Given reaction: 2HI (g) → H2(g) + I2(g) The rate of disappearance of HI over the time period from t…

Q: Consider the titration Ba(OH)2 (aq) 1 2 HNO3 (aq) ➝ Ba(NO3)2 (aq) 1 2 H2O (l). The equivalence point…

A:

Q: The conversion of cyclopropane to propene in the gas phase is a first-order reaction with a…

A: The integrated rate equation for first order reaction is  K = 2.303tlog([R]o[R]) K = rate constant t…

Q: Periodic acid, HIO4, is an important oxidizing agent and a moderately strong acid. In a 0.10 M…

A:

Q: Which of the following reactions would result in the formation of a cis alkene H₂ H3C -CH3 H3C CH3…

A:

Q: QUESTION NO. 16: The first-order rate constant for the reaction of methyl chloride (CH3CI) with…

A:

Q: The pK₂ value for HF is 3.14. Would a buffer prepared from HF and KF with a pH of 2.64 be considered…

A:

Q: important values if needed for this question. For the decomposition of hydrogen lodide on a gold…

A: We have to calculate the rate of formation of I2

Q: The following diagram represents a pair of isomers. Which of category of isomer do they belong to?…

A:

Q: 70. Consider the following. Need correct answer with explanation and why other options are incorrect…

A:

Q: The reaction of 890. g each of NH3 and O2 was found to produce 668 g of NO. 4 NH3(g) + 5 O₂(g) → 4…

A:

Q: 70. Consider the following. Need correct answer with explanation and why other options are incorrect…

A: Here we are required to find the type of product formed

Q: Identify the number of bonding pairs and lone pairs of electrons in N₂. 3 bonding pairs and 2 lone…

A: Atom is made up of nucleus (protons and neutrons)  and electrons are revolving around the nucleus.

Q: Ammonia (NH3) can be made using the reversible reaction shown. Which change would keep this reaction…

A:

Q: Making Rock Candy   Boil 0.25 L of water. Caution: Be sure to follow all safety precautions when…

A: It is very Clear that we are going to prepare saturated solution. Saturated solution :

Q: Write the expression for the solubility product constant for PbI2…

A: #1: PbI2 is an ionic salt that is sparingly soluble in water.

Q: Gaseous methane (CH₂) reacts with gaseous oxygen gas (O₂) to produce gaseous carbon dioxide (CO₂)…

A:

Q: 70. Consider the following. Need correct answer with explanation and why other options are incorrect…

A:

Q: At 415 K, ∆G = -31.0 kJ/mol for the reaction 2 A (g) → B (g). If the partial pressures of A and B…

A: There is relation between the gibbs free energy change at any temperature (∆G) with the gibbs free…

Q: First absorption rotational line in the line spectrum of AB molecule appears at 30 cm. The…

A: Here we are required to find the rotational constant for AB molecule

Q: IR is far less expensive the H NMR and a better choice to distinguish molecules when possible.…

A: IR mainly explained the functional groups that are present in a molecule

Q: Choose the valence orbital diagram that represents the ground state of Ni.

A: The outer most orbital shell of an atom is called it's valence shell, and the electrons in the…

Q: 4. What is the chemical composition of magnesium precipitate which is crystalline in appearance? *…

A:

Q: An analyst determines the Cl^- content of rain water with ion chromatography. The data for the…

A: There is a high probability that an analytical instrument will produce a signal noise whenever a…

Q: 1. How can synthesize the following compounds. Please start from simple and commercial available…

A: The starting materials used for the synthesis are commercially available. The materials used are as…

Q: Which among the following aqueous solution with the highest boiling point? 0.250 m of aluminum…

A: Boiling point is temperature at which vapor pressure of liquid become equal to atmospheric pressure.

Q: 4. A solution that has a [H+] greater than pure water is a. Acidic b. Basic 5. True or False. Bases…

A:

Q: Calculate the H+ and the percentage ionization of 0.03 M H2CO3

A: Given,  The molarity of H2CO3 = 0.03 M.  The H+ ion concentration and percent of ionization is:

Q: n each case below select the synthetic procedure that could be used to carry out the transformation…

A: The product of the following reaction method are shown as follow.

Q: 70. Consider the following. Need correct answer with explanation and why other options are incorrect…

A: This is a homolytic clevage ( both will get 1electron) and hence will form a free radical.

Q: A buffer solution contains 0.347 M C6H5NH3 Br and 0.336 M C6H5NH2 (aniline). Determine the pH change…

A: Pkb =  -log(kb)     = - log(7.4×10-10 )  Pkb  = 9.13

Q: The ionic radii of the Mg21 and 022 ions are 0.86 Å and 1.26 Å, respectively. Given that the…

A:

Q: A liquid boils at -321°F. What is its boiling point on the Kelvin scale? 77.17 77.2 -273 112 127…

A:

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".