Calculate the number of hydrogen atoms in a 130.0 g sample of tetraborane (B,H10). Be sure your answer has a unit symbol if necessary, and round it to 4 significant digits. ?

Q: H,SO4 (A) -OH но 180° K,Cr,0,, H,SO4 (B) он (F) (E) (D) (C) \KMNO4, NaOH, Hz0 PCC, pyridine sodl, py...

A: Since you have asked a question with multiple sub-parts, we will solve the first three sub-partts (A...

Q: Ammonium perchlorate (NH,CIo,) is the solid rocket fuel used by the U.S. Space Shuttle. It reacts wi...

A: Mass of NH4ClO3 = 4.0 g MW of NH4ClO3 = 117.5 g/mol

Q: 2. A 0.100 mole quantity of a monoprotic acid HA is added to 1.00 L of pure water. When equilibrium ...

A:

Q: Given that pKa = 4.72 at 25 °C for HN3, what is the pH of 0.125 mol L-1 NaN3(aq) at 25 °C? What is t...

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

Q: State the assumptions for the following expressions to apply: dH = dq Group of answer options Con...

A:   Enthalpy, H  H = U + PV. The enthalpy per unit mass is the specific enthalpy, h = u + pv. It is a ...

Q: what is the mass of calcium carbonate reacted?

A: Given, Mass of marble before reaction 3.0g Mass of marble after reaction 1.8g

Q: Suppose 4.47 g of barium acetate is dissolved in 350. mL of a 69.0 m M aqueous solution of ammonium ...

A:

Q: 1. The diagram below shows the structure of a triglyceride. M^^^ A CH2 в CH-O-C ČH;-O- a. What type ...

A:

Q: Select the correct product of the following reaction series. 1. NaOEt, EtOH 2. Br ? EtO OEt NHAC 3. ...

A:

Q: 2. Using the data in Part B, calculate the following and complete the table below. (See pg 5 in Lab ...

A: Answer: Dissolution process of NaHCO3 in water is an exothermic process and in the question we have ...

Q: Describes the differences and similarities between solids, liquids and gases on a molecular level fo...

A: Solid - - > The substances which are having very high intermolecular forces between thier molecul...

Q: Jupp0se a J00. IL IldSk IS filled with 1.6 mol of I, and 1.0 mol of HI. The following reacti H, (g) ...

A: According to guidelines we are supposed to answer only first question

Q: 2 Cu, S s(s).-30.(g)-2cu,0(s)-250,(g) 2 Cu, O +2 SO, In the second step, copper(1) oxide and carbon ...

A: Given - 1-2Cu2S + 3O2 --> 2Cu2O + 2SO2  2-Cu2O + C -->2Cu +CO   

Q: 7.50 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have...

A: Mass of the given compound us 7.50 g and molar mass of given compound is 128 g/mol. Here we have to ...

Q: Write the balanced NET ionic equation for the reaction when (NH4)2CO3 and CaCl2 are mixed in aqueous...

A: A balanced equation can be given as a reaction in which the number of atoms of each element is equal...

Q: Aqueous hydrochloric acid (HCI) reacts with solid sodium hydroxide (NaOH) to produce aqueous sodium ...

A: Given,  Mass of HCl = 1.8 g  Mass of NaOH = 3.0 g  What is the theoretical yield of NaCl when NaOH r...

Q: Pentaborane BgHg(s) burns vigorously in O2 to give B203(s) and H20(1). Calculate AHrxn for the combu...

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Q: Ammonia has been studied as an alternative "clean" fuel for internal combustion engines, since its r...

A:

Q: Chemistry Question

A:

Q: 5. Magnesium hydroxide (Mg(OH)2) has a pKsp value of 11.25. In a solution at pH 10, what is the maxi...

A: Given,  pKsp of Mg(OH)2 = 11.25  pH = 10  What is the maximum Mg2+ concentration in µmol/L = ?  What...

Q: what is the number of moles of calcium carbonate reacted?

A:

Q: 0.04 nm 104° +) A) Suppose the center of a water molecule was positioned 1.0nm away from a 2nC posit...

A: A) As we know, a charge is a source of e ll electric field,in which electric dipole (water molecule ...

Q: An unknown compound has the following chemical formula: Al,Cl where x stands for a whole number. Mea...

A: given formula = Al2Clx

Q: After performing an experiment on density. You found out that the actual density and the calculated ...

A: The experiment performed was the determination of density of a substance.

Q: Please answer all (2)

A: True and False.,    

Q: Mercury(II) oxide decomposes to form mercury and oxygen, like this: 2 HgO(s)→2 Hg(1)+O,(g) At a cert...

A:

Q: 8- Calculate the molar concentrations of the solute species in an aqueous solution that contains 285...

A:

Q: How much heat is required to raise the temperature of 1.5 x 103 g of water from 45'F to 130."F? The ...

A: Given-> Weight of water = 1.5 × 10^3 gm T1= 45°F = 8.3°C T2=130°F = 55.5°C Specific heat of water...

Q: Select the single best answer. Which of the following has more atoms: 3.13 g of hydrogen atoms or 17...

A:

Q: A mixture of helium and neon gas is expanded from a volume of 58.0 L to a volume of 86.0 L, while th...

A: Work done = P∆V 

Q: Be sure to answer all parts. The reaction between aluminum and iron(III) oxide can generate temperat...

A:

Q: Scientists can determine the age of ancient objects by the method of radiocarbon dating. The bombard...

A: a) Dinosaur fossils are too old to be reliably dated using carbon-14. Suppose we had a 67 million ye...

Q: How many moles of Ba(OH)2 are present in 225 mL of 0.200 mol L Ba(OH)2?

A: Given :-  concentration of Ba(OH)2 solution = 0.200 mol.L-1  volume of Ba(OH)2 solution = 225 mL   T...

Q: How many subshells are in the n = 3 shell? subshells How many orbitals are in the n = 3 shell? orbit...

A: given :- n =3 (n is the principle quantum no.)  To find :-  number of subshells  number of orbitals...

Q: An unknown compound has a molar mass of 118.10 g/mol. Given the following mass percent composition: ...

A: Answer: Empirical formula of the compound is the formula that represents all the atoms in the simple...

Q: 1. 3C2H5OH) + 2O2ig) 5CO2(9) + 2H2O(@) 2. 2NO2(9) 2NO(9) + O2(9)

A:

Q: 100 mL of O, 100 MOLAR HCe is to bie neutralized usna Ob250 M wihany NaoH. How selutión inust be Wed...

A: Given :- molar concentration of HCl = 0.100 M  Volume of HCl solution = 100 mL  Molar concentration ...

Q: The preparations of two aqueous solutions are described in the table below. For each solution, write...

A: Given table is :   

Q: Calculate the volume in milliliters of KOH needed to prepare 250 mL of a 0.225 M phosphate buffer wi...

A:

Q: It is the process wherein light elements such as Helium and Hydrogen form. A. Big bang nucleosynthe...

A: The lightest elements  such as hydrogen, helium, deuterium, lithium were produced in the Big Bang nu...

Q: When 0.7521 g of benzoic acid was burned In a calorimeter contalning 1,000. g of water, a temperatur...

A:

Q: A student performed a reaction using 2-methoxyethanol as solvent under acid catalyst. When the solve...

A: Given that, a student performed a reaction using 2-methoxyethanol as solvent under acid catalyst. Wh...

Q: Be sure to answer all parts. The AG° for the reaction H;@) + 1;6) = 2HI) is 2.60 kJ mol at 25°C. Ia ...

A: H2(g) + I2(g) <===> 2HI (g) ∆Go = 2.60 kJ R = 8.314 Jmol-1 K-1 T = 298 K

Q: what minimum mass of cobalt (ii) nitrate must be added

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Q: What element forms an ion with an electronic configuration of [Xe] and a −2 charge?

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Q: Which of the following processes is exothermic, given the following N2lg) + 202lg) - N204) AH"=9.67 ...

A: Any reaction that gains energy is endothermic while exothermic reaction looses energy. So, for exoth...

Q: Calculation of Phosphate Buffer Solution using Henderson-Hasselbach equation

A: Henderson-Hasselbach equation is given as:                                    pH = pKa + log [Conjug...

Q: A chemist measures the amount of nitrogen gas produced during an experiment. He finds that 87.8 g of...

A:

Q: What volume (mL) of a concentrated solution of sodium hydroxide (6.00 M) must be diluted to 200 mL t...

A:

Q: The reaction between aluminum and iron(III) oxide can generate temperatures approaching 3000°C and i...

A: Mass of Al = 118 g Mass of Fe2O3 = 601 g

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".