What number of molecules (or formula units) are present in 2.25 g of each of the following compounds? H a. molecules N b. molecules c. (NH4)2 Cr2O7 formula units

Q: Rank the compounds in each group according to their reactivity toward electrophilic substituti 1 = m...

A: Rate of Electrophilic substitution reaction increases if benzene ring is attached to the electron wi...

Q: n the calorimetry experiment was used to measure the heat of reaction for an endothermic process, wh...

A: Since you have posted multiple questions, we are entitled to answer the first only.  

Q: Match the reservoir with the correct turnover rate of carbon: + land biosphere A. centuries + ocean ...

A: Turnover rate: fraction of material that leaves a reservoir in a specifed time interval. Mathematic...

Q: What is the hydroxide concentration in a solution with a pH of 12.16 at 25 °C?

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Q: 1. Fill out the following table for part A Buffer B: Polyprotic Buffer A: PART A: Preparation of a B...

A:

Q: If 102.6 mL of water is shaken with oxygen gas at 1.8 atm, it will dissolve 0.0034 g O2. Estimate th...

A: Henry law: This law states that the concentration of a gas dissolved in a liquid depends on the part...

Q: Determine the E° , of a voltaic cell composed of Cr(s) in a 1.00M solution of Cr and Au(s) in a 1.00...

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Q: select the matching answers that apply to stereoisomers, constitutional isomers, and conformational ...

A: The compounds with the same molecular formula but the bonds connectivity is different, known as cons...

Q: In an experiment designed to measure the heat of fusion of ice, 25 grams of ice at 0oC is dropped in...

A: Given: Mass of hot water = 200 g. Initial temperature of water and calorimeter = 30.0 oC Mass of cop...

Q: - Provide a product for the following reactions. 1. Mg TMSO Br 2. PHCHO 1. HSCH,CH,SH 2. t-ButOK 3. ...

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Q: Substance Chemical Relative BP Relative Pvap Name Formula Water H20 [ Select ] [ Select ] Ethyl ethe...

A: The liquid molecules tend to convert into the vapour phase. In a closed container, the pressure of v...

Q: What is the coefficient of carbon dioxide after balancing the following equation? * KHCO3) _KCO3) +_...

A: While balancing the reaction, number of atom in reactant should be equal to number of that atom in p...

Q: Direction: Cite 5 examples for physical and chemical properties. Physical Properties Chemical Proper...

A: We have to write five examples of physical properties and also write five examples of chemical prope...

Q: 4. What is observed when th Na2SO3 solution is added to the CuCl2? 5. Which gas can be smelled when ...

A: As Student asks for doing answers from question number 4 ---- Ans. 4) When Na2SO3 is added to the Cu...

Q: A skeleton equation does NOT show which of the following? the physical states of the substances the ...

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Q: 1.Give an example of a one S block element whose valance electrons are in 4th principal quantum numb...

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Q: Question 16 of 18 Fill in the blanks: Write the letter of the pair of compounds that illustrates the...

A: Positional isomerism:

Q: What is the rate of reaction if the rate of decomposition of dinitrogen pentoxide is 1.648x10 −4 M/s...

A: Given: The rate of decomposition of dinitrogen pentoxide = 1.648x10 −4 M s-1

Q: Which of the following accurately describes Raoult's Law? O The vapor pressure of such a solution is...

A: A solution has two part- solvent and solute.Solvent is generally a liquid which present in solution ...

Q: Balance chemIcal eojuasias NO + H20 2)_ Nig Og + Fe. Ni COH)2+ Fe COH72

A:

Q: Exp # 1: suppose you have a{ Na+(aq), Ag+(aq)} solution, and you’re asked to separate the 2 ions, yo...

A: The two ions can be separated if one of the ions forms a precipitate with a particular anion and the...

Q: how about smoke? does it have mass? does it occupy space? explain please

A: The question is about,  whether smoke is a matter or not .  Further explanation in next step.

Q: Which two states of matter meet at the sublimation boundary of a phase diagram? solid O liquid O gas

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Q: The compound known as diethyl ether, commonly referred to as ether, contains carbon, hydrogen, and o...

A: a) Given: mass of sample used = 2.751 g. Mass of CO2 produced = 6.533 g. Mass of H2O produced = 3.34...

Q: Similarly, it is possible to obtain THC through a lactone intermediate and subsequent addition of a ...

A: Here grignard reagent attacks on lactone and it is a key step to give us our desired product. 

Q: A mixture of gaseous CO and H2, called synthesis gas, is used commercially to prepare methanol (CH3O...

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Q: Calculate the value of equilibrium constant Kc when: b. N2 reacts with H2 to produce NH3. At equilib...

A: Given: N2 reacts with H2 to produce NH3. The equilibrium concentration of N2, [N2 ] = 0.12 M The equ...

Q: CH3 CH3 H3C´ b.

A: For IUPAC nomenclature, number the compound in such way that in the long chain maximum number of car...

Q: Determine the mass in grams of 6.26 × 1021 atoms of arsenjc. (The mass of one mole of arsenic is 74....

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Q: explain what will happen to the liquid on a watch glass if it is transferred into a small container ...

A: Given : We have to tell what will happen if liquid kept on watch glass is placed in freezer for a fe...

Q: According to the balanced reaction below, calculate the quantity of moles of NHs gas that form when ...

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Q: 3. Synthesis as part of your synthesis. You may use any other reagents necessary. Design a synthetic...

A: The reaction is as follows:  

Q: /hich of the following is NOT a step in the mechanism of the given reaction sequence? 1. LIAIH4 OMe ...

A: We have to predict the option not included in the mechanism for given reaction.  

Q: when you pull the pluger of the syringe without needle, until it reaches 30mL, press your thumb on t...

A: Given: you pull the plunger of the syringe without a needle, until it reaches 30mL, press your thumb...

Q: Solutions were prepared to contain 100 grams of each of the following compounds in 1000g of H2O. Whi...

A: Colligative properties: The colligative properties are those properties of solutions that depend on ...

Q: A.) What volume of 8.4N Al(OH)3 will be used to prepare 350mL of 2.1M solution? B.) How many mL of w...

A: Given,  Initial Concentration = 8.4 N  Final volume, V2 = 350 ml  Final Concentration, M2 = 2.1 M 

Q: when you mix 20ml sugar and 50ml water, what will be the taste of the resulting mixture?

A: adding sugar of 20 ml to 50ml water  will give a sweet taste,the phenomena can be explained by diffu...

Q: As written, the following synthesis scheme is flawed. Draw the actual product(s) that would be forme...

A:

Q: a)Rank

A: According to the question, we need to rank the following in order of increasing size of radius. (a) ...

Q: topic: matter do you think that each sample occupies space? write the reason(s) for each sample wa...

A: Yes,  it does because whatever we see when you open ur eyes is matter and what you feel when you clo...

Q: Find the pH of 0.99 M solution of LIOH.

A: pH is power of hydrogen or potential of hydrogen. pH scale is used to determine the nature of a solu...

Q: Search the NIST library for the UV spectrum of biphenyl. What is the expected lambda (A) max?

A: Hydrocarbon is the term furnished to the molecule that has only carbon and hydrogen atoms as its con...

Q: Pre-lab Exercise I: 1. Calculate the theoretical number of moles of hydrogen gas produced. 2. What w...

A: 1.  From the given reaction ,it is given that 2 mole of H2O2 produced 1 mole of H2 gas .so theoretic...

Q: v Saved Question 5 (Mandatory) (1 point) What is the Lewis diagram for oxygen? a) b): O : c) • 0 : d...

A: Lewis symbol is written as symbol of element  and putting dots equal to number of valence electrons.

Q: This compound was synthesized from benzene by the scheme outlined. CH3 Br ČH3 1. CH3CI, AICI3 2. CH3...

A: The first step of this synthesis is called Friedel craft alkylation . It is an electrophilic aromati...

Q: • The synthesis of alpha enol derivatives is important since these compounds with appropriate substi...

A: Given : We have to show the following conversion .

Q: Exp # 1: suppose you have a{ Na+(aq), Ag+(aq)} solution, and you’re asked to separate the 2 ions How...

A: Given that, a mixture of Na+ ion and Ag+ ion. We have to separate them. We know that, Na is a group-...

Q: At 906.4 °C, the equilibrium constant K, is 4.81 × 10-5. What is the value of K? 4624.7

A: We have given  N2(g) + 3H2(g) <-----> 2NH3(g)   At 906.4°C  Kp = 4.81 × 10-5  What is the Kc i...

Q: metal object with a mass of 145.25 g is heated to 97.5 °C and then transferred to a calorimeter cont...

A: A metal object with a mass of 145.25 g is heated to 97.5 °C and then transferred to a calorimeter co...

Q: Which method enables scientists to test a theory under controlled conditions?

A:

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.