What is the mass percentage of O in CO2? Provide an answer to two decimal places.

Q: 2. For the first part of the lab, the following graph was produced. 0.6 Absorbance Curves for BCG ba...

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Q: molar solubility of

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Q: A titration of 3.36 g of an acid requires 43.72mL of 0.100M NaOH to reach the equivalence point.  Wh...

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Q: Unknown Analysis: Calculate the mass spec. of 88g per mole. (show calculations and formulas) Below i...

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

A: Concept: An acid is defined as a substance whose water solution tastes sour, turns blue litmus red a...

Q: mL

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Q: Choose the reagent(s) that would be most likely to complete this reaction.

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Q: MULTIPLE CHOICE PROBLEM SOLVING The boiling point of 350mL of substance A was determined to be 97.5o...

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Q: sample of eugenol contains 9.36x10^23 Hydrogen atoms. How many molecules of eugenol are in the sampl...

A: Given : no.of H atoms = 9.36 × 1023 atoms  To calculate :- no.of eugenol molecules in sample

Q: At the beginning of an experiment, a scientist has 244 grams of radioactive goo. After 105 minutes, ...

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Q: A 12.0 mL sample of NH3 is titrated with 0.225 M HCI (aq). It takes 9.50 mL of HCI (aq) to reach the...

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Q: Atomic Br is more efficient at catalytically destroying ozone than atomic Cl in the stratosphere due...

A: There are some statements ,we have to tell which are incorrect or false amoung the above statements.

Q: What is the outcome of the reaction shown in the box? Base + OEt B) OEt OEt OEt OEt O A

A: ->Base can abstract acidic hydrogen and form nucleophile.  

Q: 3. The equilibrium constant for the reaction: N2 (g) +Oztg) is 2.60 x 103 at 1100 °C. If 0.820 mole ...

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Q: Complete the following statements by entering the letter corresponding to the correct compound. With...

A: Given compounds: To complete the following:

Q: 1. Sodium ion (Na*) and calcium ion (Ca2) produce nearly the same color in a flame test (yellow and ...

A: When we add Na2CO3 solution to the Na+ ion no reaction take place and we did not observe any precipi...

Q: moles of argon gas at 25 °C and a pressure of 740 torr. The container is heated to 125 °C and the pr...

A: Initial Temperature = 25°c = 298 K Final Temperature =125 °c = 398 K Initial Moles (n1) = 0.40 mole

Q: In buffer preparation, arrange the following steps in correct order by placing the capital letter (l...

A: Buffer solution is made by up dissolving two components which are :  1.) A weak base and it's conjug...

Q: The oxidation number of a nitrogen atom in N2O3 is

A: Given compound is :  N2O3  What is the oxidation number of N in this compound = ? 

Q: standard deviation

A: If there is two results having standard deviation Sa and Sb. Therefore standard deviation indicate t...

Q: Hydrogen sulfide, H2S, is produced during decomposition of organic matter. When 0.3620 mol H2S burns...

A: Given :-  H2S (g) + O2 (g) → SO2 (g) + H2O (g)  ∆H = -187.5 kJ  To calculate :-  Given heat into kca...

Q: Carbon dioxide from the atmosphere "weathers," or dissolves, limestone (CACO3) by the reaction C&CO3...

A: Given-> CaCO3(s) + CO2(g) + H2O(l) --->Ca2+(aq) + 2HCO-3 (aq)  

Q: Hydrogen and Oxygen can form water (H2O). Both elements can form one compound. Beside water, both el...

A: The law of multiple proportions (or Dalton's Law) states that :- If two elements form more than one ...

Q: The diagram shows the energy of a reaction as the reaction progresses. Label each of the following i...

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Q: Write the products of the following reactions: (all reactions are a nitration) 2. H* HNO3 (MECO),0

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Q: The graph given below plots the (approximate) partial molar volumes of ethanol (black line) and wate...

A: We have find out resulting total volume of mixture.

Q: Determine the formula weight of NH,CI. Provide an answer to two decimal places.

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Q: 2. How could you use the 4 (FOUR) forms of spectroscopy that we have discussed to give you an indica...

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Q: The Zn electrode is the

A: In cell notation left side written are anode half cell and right side of species after salt bridge a...

Q: What will be produced if these two solutions are mixed together? (Hint: Complete the reactions in th...

A: Concept: precipitate is the formed when two chemical react to form a compound having very low solubi...

Q: Problem #1 Provide full IUPAC names for each of the following molecules: a) H3C. b) H3C. H. ČH3 ČH3

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Q: For the hypothetical reaction A+ 38- 2C, the rate should be expressed as Mutiple Choice rate (VINABY...

A: Given :-  A + 3B → 2C To write :-  expression for rate of reaction in terms of change in concentrati...

Q: Give the description of accompanying changes of: A. Iron rusting B. Burning wood C. Cooking an ...

A: a. Iron rusting Answer - According to the question - Rusting of iron is a chemical change because a ...

Q: 3. A solution that may contain any of the group III cations. Treatment of the solution with CIO in a...

A: Group 3 cation involve Cr3+, Al3+ , Ni2+ and Fe3+.

Q: Consider the reversible reaction:   2 HBr(g)               H2 (g)  +  Br2 (g)                     ...

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Q: Which of the following is expected to have the smallest HOMO-LUMO gap? A) B) C) D) A C B.

A: If wavelength increases HOMO-LUMO gap decreases.  

Q: che following reactions? CH;NCH3 CH3 1. HO H,SO4, с. + CH3I 2. H2C=0 3. HCI CH3 + PCI3 f. + CH;CH,MG...

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Q: 0.15- 0.05 0.02 0.04 0.06 0.08 t (s) Jse this graph to answer the following questions: What is the h...

A: Decomposition of ammonia to form hydrogen and nitrogen gas is a first order reaction. This means tha...

Q: Identify the expected product of the following Cope rearrangement. он OH -OH IV V OI O II OIV

A: It is  cope reaction, a type of [3,3]-sigmatropic reaction.  I have shown the complete reaction and ...

Q: A 25.00 ml solution of 0.1000 M HF, hydrofluoric acid (Ka 6.8 x 104) is added to 12.50 mL solution o...

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Q: Provide the major stereoisomer products for the following reaction. Assume an excess of reag CHO 1. ...

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Q: How many Joules of energy would be required to heat 35g of water from 23C to 29C?

A: Specific heat capacity of a substance can be defined as the amount of energy required to raise tempe...

Q: localized electron pairs?

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Q: What is the pH of a buffer produce by mixing 0.1330 mole of HN 3 with 0.1396 mole of LiN 3 and dilut...

A: Given, moles of acid (HN3) = 0.1330  Moles of conjugate base = 0.1396

Q: the molar solubility ("

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Q: Does Atropine act as an antagonist of 5-HT? Does Ketanserin act as an antagonist of 5-HT?

A: Atropine is the muscarinic receptors antagonists and prevent the activation of the muscarinic recept...

Q: +0: нн H-C-C-H + HÖ-C-C-Br: :Br: H H нн

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Q: A Br, B Br Br Br

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Q: PART D: Synthesis Provide a reasonable multistep synthesis of the following molecule from the 12) in...

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Q: determines the pH of the buffer region in a weak acid titration curve?

A: pH= pka+ log[salt]/[acid]      hence pH range lies between Pka+1 to pka-1, this range is called tran...

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".