The chemical formula for potassium bromide is KBr. A chemist determined by measurements that 0.0250 moles of potassium bromide participate in a chemical reaction. Calculate the mass of potassium bromide that participates. Be sure your answer has the correct number of significant digits.

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Q: What is the nuclear binding energy per nucleon, in joules, for Mg-25 (atomic mass 24.985839 amu). [D...

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Q: Differentiate between homogeneous and heterogeneous catalyst

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Q: Sodium-based street lamps emit light at a wavelength of 569 nm. What is the frequency of this light...

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Q: Q2/ The aluminum content of an alloy is determined gravimetrically by precipi- tating it with 8-hydr...

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Q: Determine the empirical formula of a compound that has the following mass percents: 37.0% iron 20.5...

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Q: A0.7547 g sample of nicotine was analyzed and found to consist of 0.5588 g C, 0.06565 g H, and 0.130...

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Q: 7. Calculate the heat needed at 0°C to make each of the following changes of state. Indicate whether...

A: Given: Initial temperature is 0.0 oC  

Q: Which column would you use for the separation of compounds A and B. Briefly explain the reason for y...

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Q: cell potential

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Q: How many moles of Li are in 1.46 x 1015 atoms of Li? 4.12 x 10-8 mol 4.12 x 108 mol 2.40 x 10° mol 4...

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Q: Referring to Question 2 in the Feedback Form, calculate the rate constant (k) for the reaction of Ye...

A: We would use the equation which is used to plot ln(abs) vs time plot.  

Q: What is the molar solubility of Ag2CO3 in pure water, given that its Ksp= 8.10x10-12? (A) 2.54x10^-3...

A: Ksp of Ag2CO3 = 8.10×10-12  Let's say molar solubility = x  Ag2CO3 ⇌ 2Ag+ + CO32-                   ...

Q: Draw the major product of this reaction. Ignore inorganic byproducts. H3O*

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Q: Let us now pretend that you are a cosmetic chemist. Since you already know the different cosmetic in...

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Q: Determine the pH during the titration of 67.0 ml of 0.375 M formic acid (K, - 1.8x10 4) by 0.375 M K...

A: a.)  Before addition of KOH, there is just formic acid solution , so we would use ionization equatio...

Q: Consider the following proposed mechanism for the reaction: 2 NO2Cl (g) → 2 NO2 (g) + Cl2 (g) ...

A: For these two reactions steps i.e. one is fast and the other is slow. The rate will be dependent on ...

Q: 2.) A researcher determined the enthalpy changed associated with the reaction: 2H,S(g) + SO2 > H20(g...

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Q: Ph Ph Ph Ph

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Q: Calculate the heat needed at 0oC to make each of the following changes of state. Indicate whether he...

A: Given : We have to calculate the heat needed for the given processes.

Q: Balance the following chemical reaction and determine the coefficients of H2O and AIK(OH)4, respecti...

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Q: Write and upload the complete and balanced equation for the following two reactions.  1) The combus...

A: The Chemical reaction follows the law of conservation of mass. According to the law of conservation ...

Q: CH, CH2 CHQ CH2 UH2 CH2 2 CH3 - C- oH 3. CAz CH2 CH, C-0

A: Given : We have to highlight the functional group present in the compound.

Q: 9. A gas obeys the van der Waals equation with P, = 3.040 x10 Pa and T. 473 K. Calculate the value o...

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Q: In the following monosaccharide hemiacetal, identify the anomeric carbon atom. Identify the appropri...

A: Cyclic monosaccharides that differ only in the positions of substituents at carbon 1 are known as an...

Q: How many moles of CH3OH are there in 68.0 mL of 0.400 M CH3OH?

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Q: Which of the following is not a characteristic of water due to hydrogen bondir Solvent Adhesion Cohe...

A: Solvent is a characteristic of water due to hydrogen bonding.

Q: Fe Bf, Et,0 Fe DCM

A: Acetylation of FERROCENE

Q: Exactly 4.0 g of hydrogen gas combines with 32 g of oxygen gas according to the following reaction. ...

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Q: A reaction is studied and found to have the two step mechanism outlined below. 5A+4B C k = 5.74 a 10...

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Q: Green plants use light from the Sun to drive photosynthesis. Photosynthesis is a chemical reaction i...

A: Given : Mass of water = 4.46g

Q: H,N. „CH, H,N. HO, но Phenylalanine (1) Tyrosine (2) H,C. HN „CH, H,C CH, H,C HO Triethylamine (4) N...

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Q: o answer. Cosmetic Product: SHAMPOO Cosmetic Product Form: FOAMING GEL Uses: Shampoo needs to be in ...

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Q: Ionic liquids are a new class of organic salts that are liquids at low temperature (usually < 100 o...

A: Ans. Green aspects of ionic liquids: (a) The interest of ionic liquids (ILs) as “green” solvents res...

Q: A 0.512 g sample of CaCO3 is dissolved in 12 M HCl and the mixture is diluted to 250 mL. A small amo...

A: A 250 mL solution of CaCO3 is prepared by dissolving a sample of 0.512 g of CaCO3 in 12 M HCl and th...

Q: Write a nuclear equation to describe the spontaneous fission of Am-244 to form I-134 and Mo-107. Det...

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Q: What is the characteristic that distinguishes metals from one another?

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Q: A 9.37 g sample of an unknown element was determined to be 0.0714 moles. What is the identity of the...

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Q: ase balance the ionic equation below & 20. í Cu(NH3)4(H2O)2]2* () + _H2SO4 (2) → _CUSO4 ee) + _(NH4)...

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Q: What is the molecular weight of Magnesium Oxide (g/mol) Mg=24 O=16

A: molecular weight of Magnesium Oxide can be calculated  by knowing  the mass of each atoms of Magnesi...

Q: I need help darwing a TLC plate  and figuring out the Rf values is the retention factor values We e...

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Q: After combustion with excess oxygen, a 12.501 g sample of an oil produced 38.196 g of carbon  dioxid...

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Q: A sample has has a volume is 265 cm^3 at a temperature of 920 Torr and 37 Celsius. Find the volume o...

A: Given that, V1= 265 cm3  P1= 920 torr  T1=37°C = (37+273)K = 310 K  V2= ? P2= 1 atm = 760 torr (STP)...

Q: Consider the following reaction and its equilibrium constant: 12 (g) + Br2 (g) ÷ 2 IBr (e) K = 1.1 x...

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Q: NH2

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Q: Explain in detail how you would go about calculating the percent oxygen in magnesium nitrate.

A: To determine: Percent of oxygen in magnesium nitrate i.e. Mg(NO3)2. Assuming 1 mole of Mg(NO3)2.  

Q: Question 1. For the following complexes, count the number of electrons using the ionic and covalent ...

A: Given,  a) Fe(H2O)63+  b) V(CN)63-  c) CuI42-  d) RuCl64- 

Q: A cell is described as stated below. Cu(s) | FeCl3(aq) | Cu(s) Match the entities present in solut...

A: Electrochemistry

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".