4. A student obtains the following data. mass of clean, dry and empty crucible mass of crucible with magnesium strip 25.3965 g mass of crucible with the oxide product Determine the empirical formula that this student should have obtained. (Note: this was actual data from a student, so the empirical formula is not what we might have predicted!) 25.2246 g 25.3372 g

Q: 2.24 What are the partial half-lives for the two major modes of decay for Cl?

A: 2.2 Partial half-lives for the two major modes of decay for 36Cl are 3.06 x 105 years and

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A: Ionic compounds are formed between ion. Metals lose electron and form cation while non-metal accept…

Q: Given the percent of ethanol in beer, 97% and percent(v/v) of ethanol through simple distillation:…

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Q: A(n) H с H-C-OH I HO-C-H H-C-OH H-C-OH I CH₂OH Glucose H H-C-OH C=O HO-C-H H-C-OH H-C-OH 1 CH₂OH…

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Q: Pentane and hexane form an ideal solution. At 25.00°C, the vapor pressure of pentane is 488.9 torr…

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Q: 15.3 Classify each of the following species as a Brønsted acid or base, or both: (a) H₂O, (b) OH,…

A: Here we are required to classify the given species as Bronsted acid or Base.

Q: 3. The substitution of Co²+ for Zn²+ in metalloproteins is an example of a substitu- tion probe,…

A: Zn2+ is really a good metal center for enzymes where it can act as hydrolyzing, amino acid cleaving…

Q: You determined experimentally the density of a solution in triplicate. Considering the results what…

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Q: Name these aromatic compounds properly. Love b) NO₂ a) 1₂11 CA3 Br

A: Rule of IUPAC-1) Longest chain as parent chain.2) Numbering start from those side where more prior…

Q: Multiply or divide the following measurements. Be sure each answer you enter contains the correct…

A: Rule of significant digit-1) In non decimal number, 0 comes after non-zero not count in significant…

Q: Using the Cahn Ingold Prelog system, determine the configuration of the chiral centers below. The…

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Q: Rank the following compounds in decreasing order of acidity. Br 1 A III > IV> || > | D OH Br B) II >…

A: Acidity order can be arranged based on the substituent in the compound.

Q: Rank these 1. HNO2, H₂SO4, HF, H₂CO3 2. NH3, CH4, H₂O, HCl 3. compounds in terms of increasing…

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Q: For each of the following ions, indicate the noble gas that has the same Lewis structure as the ion.…

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Q: Draw both chair conformations of cis-1,2-dimethylcyclohexane. What is the H3C- C1-C2-CH3 dihedral…

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Q: 11. Choose the Fischer projection that is the structure shown. Н ОН F H3C H3C- ² HI A -ОН НО- -OH…

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Q: View Policies Current Attempt in Progress Which structure is a diastereomer of the following…

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Q: Amines, NR3, are usually only weakly coordinating toward low valent metals. why is this so?Do you…

A: #Part-1: π-acceptor ligands or π-acid ligands like CO act as good ligands due to the presence of…

Q: Which of these is true? 1. A molecular formula gives the actual number of each type of atom…

A: Based on the statement we can say that the statement is true or false.

Q: Is it an element, compound, or no such classification is possible because of insufficient…

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Q: Richards and Willard determined the molar mass of lithium and collected the following data.…

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Q: A solution of 11.0% glucose is combined with 30.0 uL of a buffer stock and dH2O. The resulting…

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Q: Calculate the volume of acetic acid (in mL) required to prepare 150.0 mL of a buffer with a final…

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Q: Using matrices: (1) demonstrate that two rotations about the same axis commute (2) determine the…

A: To demonstrate that that the two rotation carried out about the same axis commute.  Two operation A…

Q: 15.67 Predict the acid strengths of the following pounds: H₂O, H₂S, and H₂Se. 15-6²

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Q: At 25 °C, the equilibrium partial pressures for the reaction 3 A(g) + 3 B(g) = C(g) + 3 D(g) were…

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Q: how they are equivalent

A: To show whether they are equivalent or not, we must first convert both to the same unit.

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Q: 15.47 Calculate the percent ionization of benzoic acid having the following concentrations: (a) 0.20…

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Q: Construct a 96% confidence interval if a sampling distribution has a mean of 10, standard deviation…

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Q: Suppose a 0.048 M aqueous solution of sulfuric acid (H₂SO4) is prepared. Calculate the equilibrium…

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Q: A sample of C₂ H₂ has 4.40 × 1024 H atoms. How many carbon atoms does the sample contain? number of…

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Q: Multiply or divide the following measurements. Be sure each a digits. 0.934 cm x 3.825 cm = 339.9…

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Q: 15.23 The pOH of a solution is 9.40. Calculate the hydro- gen ion concentration of the solution. Cาง

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Q: Macmillan Learning Give the symbols of the elements that occupy the group 13 (IIIA), period 4: group…

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Q: 15.43 The K₂ for benzoic acid is 6.5 X 105. Calculate the pH of a 0.10 M benzoic acid solution.

A: Given :  Ka of benzoic acid = 6.5×10-5 [C6H6COOH] = 0.10M  To find: pH of benzoic acid

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Q: calculate the mass of 800. atom of iron (Fe)?

A: Molar mass = Mass of 1 mole  1 mol = 6.022 x 1023 atoms

Q: The following chemical reaction takes place in aqueous solution: Cu(NO3), (aq)+Na₂S(aq) → CuS(s)+2…

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Q: Calculate the overall net charge of the following polypeptide at pH = 2.0…

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States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.