Naturally occurring Europium (Eu) consists of two isotopes with a mass of 151amu and 153amu. If the average atomic mass of Europium is 151.97amu, what are the abundances of each individual isotope?

Q: What is the molar absorptivity of copper at λmax of copper?

A: The data given is,

Q: A sample of chloroform has a mass of 62.6 g and occupies 42.0 mL.  How to calculate the density of c...

A: Here we have to find density of chloroform having mass 62.6 g and volume 42.0ml

Q: Determine which of the two is more stable and explain

A:

Q: percentage of ammonia i

A:

Q: The van der Waals equation of state was designed (by Dutch physicist Johannes van der Waals) to pred...

A: Since you have posted questions with multiple subparts, we are entitled to answer the first 3 only. ...

Q: 250. mg of an unknown protein are dissolved in enough solvent to make 5.00 mL of solution. The osmot...

A:

Q: Using Beer's Law, what is the molar absorptivity unit when concentration in ppm was used. Do not con...

A: Beer's law also called as Beer-Lambert law, states that the absorbance(A) of any solution is proport...

Q: tert-butyl chloride (2-chloro-2-methylpropane) from tert- butyl alcohol (tert-butanol) using an acid...

A:

Q: Which of the following best describes what occurs at absolute zero?

A: Absolute zero is 0K.

Q: Which of the following phosphate salts are insoluble in water? A. (NH4)3PO4 B. Li3Po4 C.Na3PO4 D...

A: Given : We have to tell which one is insoluble in water.

Q: Part 1: Describe the spectrum you would observe for the emission spectrum of elemental hydrogen gas....

A: A hydrogen atom (H) consists of 1 proton and 1 electron. According to the Bohr model, the electron w...

Q: Chemistry Question

A: 1. Select the principle carbon chain 2. Numbering 3. Naming (prefix + word root + suffix) Note :- Th...

Q: minor  product for 2-butanol and HCl ?

A:   When alcohol is treated with HCl it gives alkyl chloride  Carbocation intermediate is formed in t...

Q: e standard Gibbs free energy

A:

Q: Which salt could be added to an aqueous solution of HNO2 to suppress the deprotonation of the acid?S...

A: Common ion effect:  Common ion effect is observed when a salt  is added to weak acid which contains ...

Q: Match the description with the corresponding example: а. HF b. NH3 1. A charged, amphoteric molecule...

A:

Q: A gaseous product has a mass of 2.34g and occupies a volume of 0.854 L.The temperature in the labora...

A:

Q: What is the molar absorptivity of cobalt at λmax of copper?

A: The data given is,

Q: 2. Fill in the blanks. symbol element capital atom lowercase two solid a) All mater is made up of ti...

A: All questions are based on general inorganic chemistry related to definitions.

Q: QUESTION 2 Based on the given data, what is the Amax of copper? 0.1 M Copper 300 0.157 325 0.233 350...

A: The wavelength at which a sample has the highest absorption, is called absorption maximum.

Q: Compute the freezing point depression of 0.1% solutions of the following drugs: (a) ascorbic acid; (...

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

Q: Example 6.25 A galvanic cell consists of a metallic zinc plate immersed in 0.1 M zinc nitrate soluti...

A: In a typical galvanic cell, the electrode with higher(oe less negative) standard reduction electrode...

Q: Enumearate 4 physical changes that can be observed at home

A: Changing of a state of matter from one form to another form without changing of its composition is c...

Q: ou have 729 mls of water and you want to make a 0.864 molar (M) solution of barium hydroxide.  How m...

A: Given : Volume = 729ml  Molarity = 0.864M

Q: Given the following data and the λmax determined in the previous questions, determine: 4) the molar...

A: The data given is,  

Q: 203.77miles/sec is converted to cm/nsec?

A: 1 mile = 1.609 kilometres 1 kilometres= 1000 meters 1 meters= 100 centimetres 1 sec = 10^9 nsec

Q: What is the concentration of the original solution if 450 mL; a certain solution is diluted in 750 m...

A: Initial Volume = 450mL Final volume = 2L or 2000mL Initial concentration = ? Final concentration of ...

Q: kg/cm^3

A:

Q: empirical formula

A:

Q: What is matter

A: What is matter ? 

Q: The value of K, for the reaction is 67.0 at 945 °C. What is the equilibrium partial pressure of HI i...

A:

Q: PART C. Individual Assignments (continued) Isomers Lewis Molecular Polarity (P or NP) Molecule (draw...

A: Isomers are those compounds which have same molecular formula but different structural formula.

Q: Given the following data and the Amax determined in the previous questions, determine: 1) the molar ...

A: Since you have posted question with multiple sub-parts, we are entitled to answer the first 3 only. ...

Q: CH3 HBr H;C CHy CH,COOH ОН

A: Here we have to write the major product and minor products formed  in the given reaction . This reac...

Q: What is halide ion? Uses

A: Halide ion is a category of ions in periodic table. 

Q: the given compounds. Write your answers on the space/field provided. Separate the reagents with a co...

A: The answer is as follows:  

Q: For the generic reaction below, the rate quadruples when [A] is doubled. When [B] is doubled, the ra...

A: according to the question the rate is doubled when concentration of A is doubled and remain unchange...

Q: A solution was prepared by mixing benzene (C6 H6 ) and carbon tetrachloride (CCL4 ). Given that the ...

A: Given that, Mole fraction of benzene= 0.0852 Moles of C6H6= 0.690 mol  Moles of CCl4= ?

Q: CH2=CH(CH2)4CH3 Give the Expanded Structure and IUPAC Name

A: Expanded structure of CH2=CH(CH2)4CH3 = ?  IUPAC name of this molecule = ? 

Q: sborie Il.A galvanic cell is based on the reaction priwbnbon MnO, (aq) + H*(aq) + CI0,-(aq) → CIO, (...

A:

Q: Lithium naturally exists as two isotopes: lithium-6, with an abundance of 7.6%, and lithium-7, with ...

A: The relative atomic mass of lithium = 6.9399 amu.

Q: Consider the following reaction where K. = 7.00x10"5 at 673 K. NH4I(s) NH3(g) + HI(g) A reaction mix...

A:

Q: НО. ОН

A: Addition of hydrogen to a molecule or removal of oxygen is called reduction. Removal of hydrogen to ...

Q: does a co spot on TLC plate have two Rf values?

A:

Q: Multiple Choice: 1. The name of the compound PCI5 is A. Phosphoric chloride B. Phosphorous penta chl...

A: The binary compounds are those in which only two elements are present. The correct answer are given ...

Q: What is the concentration of copper in mM?

A: The data given is,

Q: Explain why glycated haemoglobin (HbA1C) is a suitable index for long term hyperglycaemia. Briefly ...

A:

Q: Solve the standard entalphies of the following and determine wether the reaction is endothermic or e...

A: 2NH3(g) + 3N2O(g) -----> 4N2(g) + 3H2O(l) CaCO3(s) -------> CaO(s) + CO2(g)  C(graphite) + O2(...

Q: calculate the average end-to-end distance for the ideal chain?

A: Given Data: Number of C-C bond present in the polymer chain, N = 250000                       Bond l...

Q: At 25.0 °C the Henry's Law constant for helium (He) gas in water is 3.7 × 10¯*M/atm. Calculate the m...

A: Given - - > KH = 3.7*10-4 M/atm V = 1425 ml = 1.425 L P = 3.71 atm

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.