How many neutrons in Helium? He Answer: Check

Q: What volume of 0.7777 M HNO3 is needed in order to produce 200 mL of 0.1550 M HNO3?   12.24 mL   1...

A: Given data - - > M1 = 0.7777 M V1 =? M2 = 0.1550 M V2 = 200 ml We know that from the formula M1V1...

Q: a given temperature, a first-order reaction has a rate constant of 1.5 × 10–3 s–1. What is the time ...

A: Given : Rate constant =  1.5 × 10–3 s–1

Q: The boiling points of aldehydes and ketones is higher than that of alkanes but lower than that of al...

A: The boiling points of aldehydes and ketones is higher than that of alkanes but lower than that of al...

Q: What do you call the algebraic expressions that describe the concentration relationships that exist ...

A: An equilibrium-constant expression is an algebraic equation that describes the concentration relatio...

Q: What quantity in moles of LiBr are in 55.3 grams of LiBr?

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to ...

Q: Calculate the mass-volume percent of MgCl2 in the following solution: 4.39 g of MgCl2 is dissolved ...

A: Given weight of solute and volume of solution

Q: Calculate the equilibrium concentration of all species of 0.45 M I2 (K = 5.6 × 10–12) without using ...

A:

Q: How many days will it take for 88Ra with half life of 15 days decay from 2 mole to 0.5 mole

A: As we know nuclear decay follow first order kinetics and we know that half life of first order kinet...

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

A:

Q: What is the percentage composition by mass of the substance shown below? % C = % S = % H = How many ...

A:

Q: V. Classify each amine as 1', 2 or 3'. Give the IUPAC name for each amine. CH3 a. CH3CHCH,CH2NHCH3 b...

A: According to IUPAC Naming rules answers are given below

Q: Which is bronsted lowry acid and which is bronsted lowry base, and which is no one. Answer and expla...

A:

Q: Which substance in each of the following pairs is capable of H-bonding: a. CH,NH, and CH,F b. CO, an...

A:

Q: Decide whether or not each metal dissolves in 1 molL−1HIO3(aq)molL−1HIO3(aq).   Standard Electrode...

A:   So Au (gold) does not dissolved.  But Al (aluminum) got dissolved   

Q: Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 ∘C, ...

A:

Q: Consider the galvanic cell in the following reaction Zng) + 2H* (? M) => Zn²* ( 1M) + H2 (1 M) Where...

A: Given that, for a galvanic cell, the cell reaction is Zn(s)+2H+(?M) →Zn2+(1M) + H2(1M). Where, 2H+(a...

Q: The Kb of C6H5NH3+ is 3.98x10-10 1. What is its Ka? 2. What is the [H3O+] concentration in a solut...

A:

Q: 12. What is the significance of the following stereochemical result: Co0 COo- mutase H- OH CH OP CHO...

A: Isotopic labelling is one of the ways to track the movement of atoms in any mechanism. Mutase enzyme...

Q: What are standard transformed states of Gibbs Free Energy and the Equilibrium Constant and why is th...

A:  Equilibrium Constant

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: What volume of methane (CH4) is required to react with 162 liters of carbon tetrachloride according ...

A: The balanced chemical equation for the reaction of methane (CH4) and carbon tetrachloride (CCl4) is ...

Q: Draw a mechanism for the Fischer esterification to synthesize Wintergreen.

A:

Q: Calculate the molar volume of chlorine gas at 350 K and 2.30 atm using (a) the perfect gas law (b) t...

A: Answer is given below

Q: 3) Suggest a synthesis for cach of the following molecules from the starting material indicated and ...

A:

Q: An 18-0-18 + 3% iron (Fe) fertilizer must be applied to supply 2.0 pound of N per 1,000 square feet ...

A:

Q: Arrange the following substances in decreasing order of strengths: I-, V3+, Sn2+, Co2+, Ag, H2S, Ni,...

A:

Q: 5. 2 moles of silver times 3 moles of barium per mole of silver equals: Must include units! 6. 27.3 ...

A:

Q: name the compound

A:

Q: What is the atom ratio between C and H in C2H5OH? O 1/5 2/6 2/5 2/1

A: In C2H5OH ; here number of carbon is 2 and number of hydrogen is 6

Q: An acid (HA) dissociates as follows: НА - H* + A minus Arrow should be interpreted as an equilibrium...

A:

Q: Explain Some chemicals, like hydrogen peroxide, are prone to decomposition by photocatalysis. How to...

A:

Q: Question: Can (-) and (+)-camphor be distinguis by their 1H NMR spectra?

A: (+) camphor is (1R, 4R)-(+)-camphor (-) camphor is (1S, 4S)-(-)-camphor

Q: When propane, C3H8, is burned, carbon dioxide and water vapor are produced according to the followin...

A: Law of Conservation of Mass: The Law of Conservation of Mass states that in a chemical reaction the ...

Q: acid base K name formula name formula acetic acid HCH, co, 18 - 10 pyridine CH, N 1.7 10 nitrous aci...

A:  

Q: Spectroscopy H H co,H FOCH2CH3 CH,CHCH,CI NO2 For each of the above compounds, do the following: 1. ...

A:

Q: At a certain temperature the rate of this reaction is first order in SO, with a rate constant of 0.0...

A:

Q: What is the molar concentration of HNO3 (63.0 g/mol) in a solution that has a specific gravity of 1....

A:

Q: A patient weighing 119 lb is to receive 300 mg of medication in 750 mL solution is to be titrated at...

A:

Q: 8. Determine the glement of unsaturation from the compounds or formulas below А. В.

A:

Q: For the SN1 reaction, draw the major organic product, identify the nucleophile, substrate, and leavi...

A: First step(initial step) is the protonation of alcohol. Which is a fast step. Second step is cleavag...

Q: A 2.05 g sample of an unknown compound contains H, S, and O. If the compound contains 0.050 g H and ...

A:

Q: The bond energies of Cl-Cl, C-C and C-H are 59 Kcal/mole, 90 Kcal/mole and 105 Kcal/mole respectivel...

A: The breaking of a bond requires the absorption of energy. The higher the stability of bond, the high...

Q: Percent composition for P f4O

A: Calculate% composition in PF4O ?

Q: Two chemicals A and B are combined to form a chemical C. The rate, or velocity, of the reaction is p...

A:

Q: Use the following energy diagram for a two-step reaction as reference. В Po te nti A al Reactant En ...

A: The energy diagram given is,  

Q: Gravimetric analysis is a quantitative method that involves measurement of volume of a solution of k...

A:

Q: The initial rates of a reaction at different initial concentrations of the reactants were determined...

A: Given that, A + B ----> product rate, r= k [A]m[B]n where,  m is the order of A with respect to B...

Q: 18. How many grams of solid Cu2SO4 5H2O (249.68 g/mol) must be dissolved in 400 mL of water to obtai...

A: Concentration or molarity is defined as the number of moles of solute dissolved in one liter of solu...

Q: In Part 1, draw a mechanism for the reaction of butan-1-ol with sodium amide. In the box on the left...

A: Given reaction is : Draw the curved arrow mechanism of the given reaction = ?   

Q: Name of Experiment: The dentification of an unknown weak acid by potentiometric titration. Q1: Purpo...

A:

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.