Ammonia (NH3)(NH3) and hydrazine (N2H4)(N2H4) are both binary compounds of nitrogen and hydrogen.   Based on the law of multiple proportions, how many grams of hydrogen would you expect 2.38 gg of nitrogen to combine with to yield ammonia?

Q: In 1961, scientists agreed that the atomic mass unit (amu) would be defined as 1/ 12 the mass of an…

A: Since you have posted a question with multiple subparts, we will solve the first three subparts for…

Q: Explain how J. J. Thomson’s determination of the charge-to-mass ratio of the electron led to the…

A: Thomson Atomic model introduced us to the world of subatomic particles. He discovered the first-ever…

Q: What are the main ideas in Dalton’s atomic theory? How do they help explain the laws of conservation…

A: Dalton’s atomic theory ideas are as follows All matter is made up of tiny constituents called…

Q: 27. Upon decomposition, one sample of magnesium fluoride produced 1.65 kg of magnesium and 2.57 kg…

A:

Q: Consider two compounds. Compound A contains 15.7 g of sulfur and 18.6 of fluorine. Compound B…

A: Mass of fluorine in compound A = 18.6 g Mass of sulfur in compound A = 15.7 g Mass ratio of fluorine…

Q: Distinguish between molecular substances and ionic substances in terms of their composition?

A: Ionic compounds have strong ionic bonds while molecular substances have covalent bonds. Molecular…

Q: hydrogen phosphide can be decomposed to give phosphorus and hydrogen in a mass ratio of 10.32:1.00.…

A: the molecular formula of this substance is PH3 and the name of this compound will be phosphine.

Q: Carbon combines with oxygen in a mass ratio of 1.000:2.664 to form CO2 and in a mass ratio of…

A:

Q: During nuclear decay a 238 U atom can break apart into a helium 4 atom and one other atom. Assuming…

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Q: Suppose that atomic masses were based on the assignment of a mass of 12.000 g to 1 mol of carbon,…

A: An element is positioned on the basis of atomic number. Each atom will have a fixed and different…

Q: The mass of an atom of hydrogen is 1.673 x 10-24 g. How many atoms are in a 10.5 g sample of…

A: Given, Mass of a hydrogen atom = 1.673*10-24 g. Mass of sample = 10.5g.

Q: X is an element with 3 isotopes, X-139, X-140 and X-141. The relative abundance of each isotope is…

A: If A1 , A2 and A3 are mass numbers of three isotopes of an element with relative abundance X1 , X2…

Q: Two compounds of Cl and X are found to have molecular masses and % Cl, by mass, as follows: 137…

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Q: How many electrons make up a charge of 56nC? If these are made of copper atoms, how many atoms would…

A: The charge is always quantized. The number of electrons can be determined as follows: Number of…

Q: Suppose that atomic masses were based on the assignment of a mass of 12.000 g to 1 mol of carbon,…

A: SOLUTION: Step 1: One Dalton is defined as one-twelfth the mass of one mole of carbon-12 isotopes.…

Q: Sulfur forms several compounds with fluorine. Upon decomposition, sample one produces 4.45 g of…

A: Given information is:                   Sample 1 →Decomposition F(4.45grams) + S (1.25grams)…

Q: The two isotopes of potassium with significant abundance in nature are ³⁹K (isotopic mass 38.9637…

A: NOTE : The sum of abundance of the two isotopes should be 100 %. And since the abundance values do…

Q: The mass of a single platinum atom is 3.24×10-22 grams. How many platinum atoms would there be in…

A: The mass of an atom is the amount of matter present in the substance. The mass of an atom remains…

Q: A 3.23 g sample of calcium sulfide was decomposed into its constituent elements producing 1.80 g of…

A:

Q: You are given 1.0g samples of Iron, Silicon, and Lithium. Which of the three samples will contain…

A: Given: 1 g sample of Iron, silicon and lithium To find: Sample containing largest number of atoms…

Q: Consider chlorine, which occurs as a mixture of two isotopes: chlorine-35, with a natural abundance…

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Q: 2. How many Sulfur atoms would be present in 32.5 moles of Sulfur?

A: Here,  Questions given moles and apply the value of Na , calculate the no of atom Na value is…

Q: Bromine has two naturally-occurring isotopes. 79Br has a mass of 78.9 amu and accounts for 58.3% of…

A:

Q: Chromium reacts with oxygen to form threedifferent compounds, X,Yand Z. It was found that, for every…

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Q: Solve the given problem using an element that has three naturally occurring isotopes. Click on the…

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Q: What is the mass of a single fluorine molecule, F2?

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Q: How many moles of aluminum do 6.00*10^24 aluminum atoms represent?

A:

Q: What mass of nickel would contain 5.66 x 1021 atoms?

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Q: A metal x forms two different chlorides if 12.7g of chloride A and 16.3g of chloride B . contain…

A: To find: A metal x forms two different chlorides if 12.7g of chloride A and 16.3g of chloride B…

Q: In a test of the Law of Multiple proportions, two different compounds composed of elements A and B…

A: For compound X B/A = 2.33/1.00 = 2.33   For compound Y B/A = 5.83/1.00 = 5.83   Divide these two…

Q: A 12.49 g sample of NaBr contains 22.34% Na by mass. Considering the law of constant composition…

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Q: A platinum atom has a radius of 177 pm. If you could string platinum atoms like beads on a thread,…

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Q: The water found on Earth is almost entirely made up of the 'H and 160 isotopes for a formula of H2O…

A: The element which contains the same number of protons and different number of neutron is known as…

Q: The mass of an atom of hydrogen is 1.673 x 10-24 g. How many atoms are in a 10.8 g sample of…

A: Since mass of 1 H atom = 1.673 x 10-24 g Hence assuming in 10.8 g sample of hydrogen we have n…

Q: A 11.65 g sample of NaBr contains 22.34% Na by mass. Considering the law of constant composition…

A: Law of constant composition:It is also known as law of definite proportions.  It states that a…

Q: How many grams of Kr are there in a sample of Kr that contains 6.43×1023 atoms? A sample of Xe…

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Q: 1. Titanium has five common isotopes: 46TI (8.000%, 45.95 amu), 47TI (7.800%, 46.95 amu), 48TI…

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Q: The average atomic mass of carbon is 12.011 amu. Assuming you were able to pick up only one carbon…

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Q: An atom of copper has a mass about four times greater than that of an atom of oxygen. What choice…

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Q: How many electrons are necessary to produce a charge of -1.2 C? Express your answer using two…

A: Given that , The charge produced = -1.2 C

Q: When carbon and oxygen react, two different compounds can form dependingon the conditions. Compound…

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Q: On the fictional planet Zeus, bromine occurs as 34.05% of 79Br (atomic mass = 78.918 u) and 65.95%…

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Q: Phosphorus-31 forms an ion expressed as 31P3-.  What is the required change in the number of…

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Q: Hydrogen sulfide is composed of two elements: hydrogen and sulfur. In an experiment, 6.500 g of…

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Q: Two elements X and Y combine to form two compounds with the following compositions: Compound % Mass…

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Q: How many helium (He) atoms are there in (3.74x10^2) g of helium?

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Q: Since 1983, pennies have been made with zinc and plated with copper. Prior to 1983, pennies were…

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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.