Historically, some unit differences reflected the belief that the quantity measured was different when it was later revealed to be a single entity. Use the web to look up the origins of the energy units erg and calorie, and describe how they represent an example of this type of historical development

Q: Find the element with the highest oxidation number in each of the following formulas: 1.Na2Cr2O7 2.K...

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for you...

Q: Complete the following  conversions between SI units.  A. 612 g=___mg B. 8.160 m=___cm C. 3779 ug= _...

A: 1 g = 103 mg 1 m = 102 cm 1 ug = 10-6 g 1 mL = 10-3 L 1 kg = 103 g

Q: How many carbon atoms are in 259.42 grams of pentane?

A: Avogadro's defines 1 mol as unit, which contains 6.022×1023 number of particles. It is also defined ...

Q: Arrange the compounds in each set in order of increasing base strength. consult Table 4.1 for pKa va...

A: Ethoxide is an base, which accepts proton and becomes ethanol (conjugate acid). Ammonium ion is an a...

Q: Which of the following is a chair conformation of cyclohexane? II IV O Iv

A: The compounds which have same molecular formula and different structures are known as conformers. Th...

Q: Which of the following is an incorrect statement: O somers have the same molecular formula such as c...

A: Option A is coorect  Because for structural isomerism molecular formula and molecular mass should be...

Q: Calculate the pH and concentrations of CH,NH, and CH,NH† in a 0.0407 M methylamine (CH,NH,) solution...

A: CH3NH2 is a weak base. In water, the following equilibrium reactions happens:

Q: A compound contains arsenic and oxygen as its only elements. A 1.626g sample of the compound contain...

A:

Q: Fill in the blank in this statement referring to Lewis structures. There are times when two or more ...

A: In lewis dot structure we are using the valence electrons for determining the structure of the molec...

Q: Name the following compound:

A: Steps involved in IUPAC naming of substituted alkane: 1. Select the parent chain. This is the longes...

Q: A 0.5131-g sample containing KBr is dissolved in 50 mL of distilled water. Titrating with 0.04473 M ...

A: The mass of sample containing KBr dissolved in 50 mL of distilled water is 0.5131 g. The volume of 0...

Q: A halothane- oxygen mixture (C2HBrCIF3 + O2) can be used as an anesthetic. Assume that a tank contai...

A: Given data,P(halothane)=170 torrP(Oxygen)=570torrMass of O2=160g

Q: How many mL of 0.600 M LiCl would be required to make a 0.0600 M solution of LiCl when diluted to 30...

A: Plz find the file attached for explanation

Q: Chemistry A 33.58 g stainless steel ball bearing at 117.82°C is placed in a constant-pressure calori...

A: We are given that the weight of stainless steel ball-bearing is 33.58g and its temperature is 117.82...

Q: How many moles of NaOH will be required to neutralize 0.000835 moles of oxalic acid?

A: The following balanced chemical equation gives the neutralization reaction of NaOH with oxalic acid....

Q: Please see question attached

A: pH measures the hydrogen ion concentration. Acids have low pH (<7 ) whereas bases have high pH ( ...

Q: Ethylene glycol, used as a coolant in automotive engines, has a specific heat capacity of 2.42 J/(g·...

A:   Mass, m=3.65 kg=3650 g Specific heat capacity, c= 2.42 J/(g·K) Tfinal=85°C=358.15K Tinitial=132°C=...

Q: The question is in the photo.

A: When atoms are in their ground state, the electrons occupy the lowest possible energy levels which i...

Q: The most stable chair conformation of 4-ethyl-1-isopropyl-2-methyl-cyclohexane where the isopropyl g...

A: For the most stable chair conformation, the bulkiest group, i.e., isopropyl has to be on equatorial ...

Q: Please help

A: Introduction: Boron atom has empty orbitals so it act as electrophile it means it is ready to accept...

Q: the atomic mass of C is 12.011u. How many moles of C are there in 3.50g sample of carbon?

A:

Q: If a stufent dropped their copper on the floor,they could carefully pick it up and place it on the b...

A: While weighing compounds using balances, it is very important to take care that all sources of error...

Q: According to the solubility chart, is MgCO3 soluble or insoluble?

A: Solubility is the ability of a substance to get dissolve in a solvent.  

Q: Ammonium perchlorate (NH Cio,) is a powerful solid rocket fuel, used in the Space Shuttle boosters. ...

A: The balanced reaction is:

Q: Calculate the root mean square velocity of methane at 27 degree Celsius

A: The temperature of the system is given = 27 oC The root mean square speed of the gas can be calculat...

Q: Determine the quantity (g) of pure CaCl2 in 7.5 g of CaCl2•9H2O. Show your work

A:

Q: C8H18 +      balance the equation    O2 →       CO2 +       H2O

A: Balance equation represents the number of atoms of each compound involved in a reaction is equal on ...

Q: What is the formula mass of (NH4)2SO4?

A: Atomic mass of N=14 g/mol Atomic mass of H=1 g/mol Atomic mass of S=32 g/mol Atomic mass of O=16 g/m...

Q: I need help with the problem set.

A: The expression of ideal gas equation is shown below: PV = nRT Where; P = pressure V = volume n = mol...

Q: can you walk through the steps on evaluating this problem

A: (a) For the dissociation of K2HPO4 in the aqueous medium, the chemical equation can be written as- K...

Q: Chemistry Question

A: The standardization of potassium permanganate is done with the help of pure oxalic acid. The reactio...

Q: Please answer very soon

A: C5H5N is a base. It is soluble in water. It takes proton from the water to produce its conjugated ac...

Q: How many hydrogen atoms are in 164.18 grams of hexane?

A: Molar mass of hexane (C6H12) = 12 x 6 + 12 = 84 g Number of moles of C6H12 = 164.18/84 = 1.95 moles

Q: What is the molarity of an aqueous solution prepared by adding 36.5 g of bariumchloride to enough wa...

A: Molarity is defined as total number of moles of solute present in 1000 ml of solution Molarity = mol...

Q: Paregoric 15.0 mL Pectin 0.5 g Kaolin 20.0 g Ethanol 1.0 mL Purified water ad 100.0 mL Mix and make ...

A:

Q:

A: We are authorized to answer 3 parts at a time. Since you have not mentioned which parts you are look...

Q: Fifty (50) kmol per hour of air is compressed from P = 1.2 bar to P2 = 6.0 bar in a steady-flow comp...

A: Generally the heat transfer from the compressor is denoted by Q. The heat transfer from cylinder wal...

Q: Which of the species below best depicts the likely transition state for the reaction between methyl ...

A: transition state of a CH3I and NaSCH3 involves Iodide ion is a leaving group and SCH3 is a nucleaoph...

Q: help

A: Equilibrium means it is the condition at which concentration of reactant or product are equal. Equil...

Q: explain please

A: Given- Molar solubility of copper(II) hydroxide = 1.77 x 10-7 M To find - Molar solubility of copper...

Q: Why does a reaction that has a starting material contain a boiling point of 165 °C whereas a product...

A: Boiling point increases as intermolecular forces increase. The hydrogen bonding is the key to determ...

Q: After an attempt to resolve a racemate into its enantiomers, the observed rotation is +22.4 degrees ...

A:

Q: Solid potassium chloride dissolves in water according to the equation below.KCl (s) ⟶ K+ (aq) + Cl− ...

A:

Q: Consider the following definitions.1 doz = 121 gross = 1441 ream = 5001 molmol = 6.022×10236.022×102...

A:  “Since you have posted a question with multiple sub-parts, we will solve the first three subparts f...

Q: Rank the following alkenes from 1-4. 1 being most stable and 4 being least stable.

A: The stability of alkenes is defined by the substituents attached to the alkene or in terms of alpha ...

Q: Explain in detail please! Thank you

A: