When comparing two data sets, how do you determine which among the two is more precise using measures of precision?

Q: How many modes of H+ grein 855mL of 0.65 m nitric acid, HNO3

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Q: What is the mass in grams of precipitate formed when 250.0 mL of 0.160 M ZnCl₂ is mixed with excess…

A: Answer:- This question is answered by using the simple concept of stoichiometry which involves the…

Q: The distribution coefficient, k = concentration in hexanes + concentration in water, between hexanes…

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Q: Can you answer the question and explain it? With the mechanism  Only g and h and i

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Q: The chemical formula for beryllium sulfide is BeS.A chemist measured the amount of beryllium sulfide…

A: Since, Moles is the ratio of mass to the molar mass of that atom or molecules. Thus,

Q: Complete and balance the following reactions - assume they all go a. solid potassium carbonate…

A: On heating a salt/chemical compound it undergoes decomposition or dehydration.

Q: An unknown compound has the following chemical formula: PtClx where x stands for a whole…

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Q: Using just a periodic table (not a table of electronegativities), decide which of these is likely to…

A: More the electronegativity difference between two atoms more will be the polar bond between them.…

Q: A wood sample from an Egyptian tomb gave a C-14 activity per unit mass of 7.3 per min per g.…

A: we need to calculate the age of the wood sample in years.

Q: How many hydrogens are present around each carbon atom in the following molecules? goreng H HO…

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Q: Complete and balance the following reactions - assume they all go a. solid ferric oxide plus water…

A: Chemical formula of ferric oxide is Fe2O3  Chemical formula of silver nitrate is AgNO3  Chemical…

Q: A meniscus is "read" at the bottom of the convex curve and can only be reported to one more…

A: In a burette, the readings are such that the volume increases as we go down. It starts from 0.00 mL…

Q: Proteins that are abundant in charged side chains are stabilized by hydrophobic interactions.

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Q: Which of the following do not correspond to the actual ground state electronic configurations of any…

A: As we know an orbital can accommodate a maximum of two electrons. This means s - subshell with one…

Q: 4. Which of the following statement(s) is/are correct? (i) All substances (elements or compounds)…

A: This question is related to the thermodynamics. Thermodynamics is the branch of chemistry that…

Q: Does the molecule below exist as a pair of enantiomers? If so, change the bonds to wedges and dashes…

A: The structure of the given compound is  Whether the given molecule exists as pair of enantiomers or…

Q: A 0.160 M weak acid solution has a pH of 4.33. Find Ka for the acid. Express your answer using two…

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Q: The Kjeldahl analysis is used to determine the protein content of foods. The food analyzed is heated…

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Q: 1. What is 4,H for this reaction: 3C(s) + 4H2(g) → C3H8(g) given the following reactions: C3H8(g)…

A: The enthalpy change is a state function and the Hess law states that the change of enthalpy in a…

Q: 8. The reaction below was carried out in a calorimeter initially at 22.0 °C. After 0.0180 g of iron…

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Q: 1. Give the sequence of the tripeptide using the ONE-LETTER DESIGNATION (UPPERCASE LETTER) with NO…

A: here we are required to find the structure of the tripeptide.

Q: 2.Explain why the pKa values of the indicated hydrogen atoms change for these three compounds. 노선 H…

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Q: Can you answer the question and explain it? With the mechanism  Only e and f

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Q: What is the pH for a 0.0375 M aqueous solution of potassium hydroxide (KOH, MW = 56.11 g/mol)?

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Q: What mass of precipitate (in g) is formed when 20.5 mL of 0.300 M Ni(NO3)2 reacts with 32.5 mL of…

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Q: 4. Consider the redox reaction below. Determine the oxidation number of each atom in the redox…

A: Answer:- This question is answered by using the simple concept of molar concentration. Then using…

Q: How many cis/trans isomers does this molecule have? Enter the number in the box above the drawing…

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Q: Gases exert a measurable pressure (P) on the walls of their container. The SI unit for pressure is…

A: The relationship between pressure is the pascal  and millimeters of mercury is 101325 Pa = 760 mmHg…

Q: r which one of the following reactions is Kp equal to Kc? NH41(s) = NH3(g) + HI(g) 2NH3(g) = 3H₂(g)…

A: Kp is equilibrium constant expressed as when equilibrium concentration is measured by atmospheric…

Q: Calcium carbonate decomposes to form carbon dioxide and calcium oxide. CaCO3 --> CO2 + CaO. How many…

A: Given -> CaCO3 ----> CO2 + CaO  Weight of CaCO3 = 200 gm

Q: A solution has a pH of 10.80 at 25 °C. What is the hydroxide-ion concentration at 25 °C?

A: pH is defined as the negative logarithm of hydrogen ion, H+ concentration of base ten .The…

Q: Consider the reaction. heat 2 Al(s) + Fe₂O3(s) Al₂O3(s) + 2 Fe(1) If 13.5 kg Al reacts with an…

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Q: What test will you use to differentiate Alkenes from alkynes? Explain.

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Q: Give the theoretical yield of CO₂ in grams from the reaction of 8.000 moles of C8H18 with 4.000…

A: Limiting reagents is a reagent that consumed first in chemical reactions means his quantity less in…

Q: 0= Predict the product and provide a mechanism. 1. LIAIHI 2 ETOH NaBH₂ EtOH 1. CH₂M₂Br 2. EtOH

A: Note: As per our guidelines, we are supposed to answer only three subparts when multiple subparts…

Q: 1. Use standard enthalpies of formation from the equation sheets or the back of your book to…

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Q: 1. How many moles are in 3.5 g of aspirin (C,H,O4)?

A: Since you asked multiple questions so as per Q&A guidelines of portal I solved first question…

Q: Choose the major product(s) for the following reaction: I Select one: a. IV O b. III Br c. I, III,…

A: Here we to predict the major products formed in the following given reaction. Here both SN1 and E1…

Q: Curved arrows are used to illustrate the flow of electrons. Follow the arrows to predict the product…

A: Here we are required to predict the product of the reaction.

Q: Each of the following compounds does not react in a Diels-Alder reaction. Explain why in each case:

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Q: Which of the following is the stronger acid? HỌ–CH, I HỌ–CH=CH II Note: HO- proton is the most…

A: Compound is said to be strong acid if it easily released H+ ion when dissolved in water .

Q: Use the standard reduction potentials given below to predict if a reaction will occur between Co(s)…

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Q: Q.02: Write the structure of benzil, benzoin and hydrobenzoin. Q.03: Write the name of two common…

A: Given -> -> Benzil , benzoin and hydrobenzoin  -> A substance that tends to bring about…

Q: concentration for a solution having an absorbance of 0.350 and a molar absorptivity of 420 L mol-1…

A: Absorbance is directly proportional to concentration

Q: The half-life of a carbon-14 is 5,370 years. If today we have 200 grams of carbon-14, a. How much…

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Q: Copper(II) acetate containing copper-64 is commonly used to study brain tumors. This isotope has a…

A: Given, Copper (II) acetate containing copper 64 is commonly used to study brain tumors. The half…

Q: Identify the relationship between the following two compounds. A) identical B) constitutional…

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Q: How many formula units are in 0.032 moles of Fe2O3? A sample of 7.30x10^24 atoms of silver weighs…

A: We need to calculate  formula units in 0.032 moles of Fe2O3 mass of 7.30x1024 atoms of silver…

Q: HO. 1) OFC 2) H₂00 -8r - 114 Brit Si- Mg TBAF -0w Mg Br ni √ 216,00 ✓ он Provide mechanism with the…

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Q: How many electrons are in an element whose electron configuration is: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2…

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Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.