The molar masses of the four natural isotopes of chromium are 50 g mol-1, 52 g mol -1 53 g mol -1 and 54 g mol -1. The mass fractions of these isotopes in the element are 0.0431; 0.8376; Find the molar mass of chromium since it is determined as 0.0955 and 0.0238.

Q: In 1961, scientists agreed that the atomic mass unit (amu)would be defined as the mass of an atom of…

A: Yes, the Avogadro number is changed and now becomes bigger than previously. Yes, the definition of a…

Q: 7.00 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have…

A:

Q: (a) In the certain hydrated salt MSO3-4H20, the mass percentage of H2O is 44.71%. Identify the…

A:

Q: Lithium nitride reacts with water to produce ammonia and lithium hydroxide according to the equation…

A: Molar mass of D2O = (2.014 x 2) + 16 = 20.028 gm/mol Molar mass of ND3 = 14 + (2.014 x 3) = 20.042…

Q: A 2.63 g2.63 g sample of a compound consisting of carbon, hydrogen, oxygen, nitrogen, and sulfur was…

A:

Q: 1. Which of the following is not one of Dalton's laws? a) Atoms are indestructible. b) Atoms of the…

A:

Q: The combustion of 4.62 mL of liquid ethanol (C2H5OH, density = 0.789 g/mL) in the presence of 15.55…

A:

Q: A vessel originally contained 0.055 mol iodine monobromide (IBr), 0.0012 mol I2, and 0.0060 mol Br2.…

A: Q = Reaction quotient  It is the ratio of amount of product to the amount of reactant . By the…

Q: Please answer a-c

A: (a) To calculate the moles of water lost, As per the given information, Mass of water lost is 0.351…

Q: Consider the hypothetical reaction of the real-life element iron and the fictional element vibranium…

A: Solution:- Given:- Reaction > Fe + Vi →Fe4Vi3  Balanced chemical equation:- 4Fe + 3Vi → Fe4Vi3…

Q: How much would 2.4 x 1024 molecules of N2O5 weigh?

A: Given- number of Molecules =2.4 ×10^24 molecules

Q: Explain the concept of Mass spectrometry ?

A: Spectrometry is a practical approach of spectroscopy. It is an application of spectroscopy and deals…

Q: 8.00 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have…

A: Assuming the molecular formula of compound is CaHbOc  And since moles = mass / molar mass Hence…

Q: radidactive research, particulary in studies mass (in mg) oudsoud g of Na, 32PO, after 40.0 days?…

A: Radioactive decay follow first order kinectics. Half life = 14.3 days

Q: One mole (molecular equivalent) of gold has a mass of 196.9655 g.  One mole of anything equals 6.022…

A: Given : Mass of gold (1 mole)= 196.9655 g  Diameter of gold = 3.58 × 10-10 m Block of gold of mass =…

Q: Calculate the % by mass C in C4H8O

A: % by mass of C in C4H8O = (mass of C/mass of C4H8O) × 100%

Q: The total weight of a mixture containing CaO and BaO is 0.6411 g, and the weight of anhydrous…

A: The total weight of CaO and BaO is 0.6411 g. The total weight of anhydrous sulphate salts obtained…

Q: Imagine you mix 16.05 g of methane (CH4) gas and 96.00 g ofoxygen (O2) gas and then ignite the…

A: First order reaction is a reaction that proceeds at a rate that depends linearly on only one…

Q: 56.7 g of H,S reacts with 30.9 g of SO, according to this reaction + SO, 2H,S + So, = 35 + 2H,0 What…

A:

Q: Dinitrogen monoxide (N₂O; nitrous oxide) is a greenhousegas that enters the atmosphere principally…

A: Isotopes possess same number of protons but differ in number of neutrons thus, they have different…

Q: 2. A test of an automobile engine's exhaust revealed that 3.7 g of NO2 was emitted in 10 minutes of…

A: given mass of NO2 gas emitted= 3.7g gas emitted in 10 min. = 3.7 g molar mass of NO2 =14+ 16×2= 46g…

Q: Suppose 2.367g of TiO2- containing sample evolves 0.143g of O2. What is the mass percent of TiO2 in…

A: The equation involved in the determination of purity of TiO2 sample is as follows.…

Q: Calculate the average atomic mass of Amazium, a newly discovered element (Amazium, symbol Az) which…

A: Given :- There are only 2 naturally occurring isotopes of Amazium. Mass of isotope Az-230 = 229.995…

Q: 6. Explain what the coefficient of 4 means in the following chemical formula: 4K,SO,

A: Given that, 4K2SO4

Q: Determine the mass percentage of carbon, C, hydrogen, H and oxygen, O, in C7H14O. Refer to the…

A: C7 H14OMass of carbon = 7 ×12= 84 gmass of hydrogen = 1×14 = 14 gmass of oxygen = 16×1 = 16…

Q: The molar mass of nicotine C10H14NX is 162 g/mol. What is the value of x?

A:

Q: An experiment requires that enough C6H12O6 be used to yield 17.2g of oxygen . How much C6H12O6 must…

A:

Q: substance with a molar mass of 231.40 g/mol is made up of 72.30% Fe, and 27.70% Oxygen. The…

A:

Q: Atomic mass of Na = 22.98976928 ±0.00000033 g/mole Atomic mass of Cl = 35.4570± 0.0027 g/mole Mass…

A: Molarity of a solution is defined as the number of moles of solute present in 1 L of the solution.…

Q: When the supply of oxygen is limited, iron metal reacts with oxygen to produce amixture of FeO and…

A: Given: Mass of iron metal = 20.00 g Mass of oxygen gas = 11.20 g Mass of remaining gas of oxygen =…

Q: If 8g of element Q contains 1.204 X 1023 mol-, calculate the relative atomic mass of element Q.…

A:

Q: a certain protein has a molar mas of 2.88 x 10^5 g. what is the mass of the molecule of this protein

A: Given: Molar mass  of Protein = 2.88 x 105 g.  1 mole = 6.022 X 1023  molecules

Q: 17- How many moles of gold are in 8.96 x 1020 atoms of gold? (Gold has a density of 19.3 g/mL, and…

A: 1 mole compound contain = 6.022 × 10²³ Molecules From this realtion we can convert the atoms into…

Q: How many moles would 1.00 x 10^23 molecules of methane(CH4) represent

A: Given  Number of molecule of CH4  = 1 × 1023 molecule  Number of mole = ?

Q: In the Haber Process, hydrogen (H2) and nitrogen (N2) react to produce ammonia (NH3)   H2 + 3H2…

A: Exothermic reaction is reaction accompanied with loss of heat. Reaction- H2 + 3H2 ----> 2NH3  +…

Q: How many Sn atoms are there in a 20.7 gram sample of Sn ?

A: Avogadro's  number gives the number of atoms, molecules or ions in one mole of the substance and it…

Q: Write A if only statement A is true; Write B if only statement B is true; Write C if both…

A: This type of question required basic knowledge  about Laboratory reactions like reactivity  of…

Q: Determine the mass percentage of carbon, C, hydrogen, H, and oxygen, O, in C,H1,0, Refer to the…

A: Mass percentage of an element can be expressed in terms of mass of element divided by its total mass…

Q: The mass ratio of sodium to chlorine is sodium chloride is 0.649:1.  A sample of sodium chloride…

A: 2NaCl ------> 2 Na + Cl2 Mass ratio of sodium to chlorine is sodium chloride is 0.649:1. Sample…

Q: the complete decomposition of 1.0 gram of potassium chlorate gives potassium chloride and oxygen…

A: A numerical problem based on mole concept, which is to be accomplished.

Q: A Chemistry solutions of a carboxylic acid and an alcohol. He then prepared the ester as per…

A:

Q: What is the average atomic mass of a mystery substance that is 27.5 at a mass of 37g and 72.5% at a…

A: Given: Mass =37 g  Percentage %=27.5 % Mass =38 Percentage % =72.5% Average mass=?

Q: how many atoms per particle in sulfur(s8)?

A: Atomic mass of sulfur = 32g Molecular mass of S8 =8×32=256g

Q: Consider the following equation: The mass number of element X is: 247A + 18B → 89C + {x}X + 2 1n

A: 247A  + 18 B ---------------> 89C  +   xX  + 2  1n

Q: galena a mineral of lead is a compound of the metal with sulfer. Analysis shows that a 17.74 g…

A:

Q: Calculate the mass of antimony(III) lodide, Sblg, that can be produced by the reaction of 143 g of…

A:

Q: 8) 3.57g of Lithium Carbonate were produced produced, how many grams of Magnesium Nitride were as…

A: From the given questions, it seems that the reaction between lithium nitride and magnesium carbonate…

Q: 8. How many milligrams of iron are delivered from a 250. mg tablet of FeSO,-7H,O? Percentage %CaCl,…

A: Q9) U3O8 molar mass                 Atomic mass of U =238       Atomic mass of oxygen =16…

Q: The characteristic odor of decaying flesh is due to the presence of various compounds. One such…

A: Given data contains, Mass percent of carbon is 62.04%. Mass percent of hydrogen is 10.41%. Mass…

Q: how do i do this

A: Given,Mass of ND3 = 295.0 mg = 0.295 g   (1 mg = 0.001 g)Moles of ND3 can be calculated as:

Mass Spectrometry

This process is an instrumental method in which a sample is changed to fast moving positive ions by electron bombardment. The charged particles vary due to their different mass to charge ratio and are estimated with the help of this difference. It is also called mass spectroscopy.