Which statement explains how balanced chemical equations obey the law of conservation of mass? Choose the correct answer.     The same number of each kind of atom appears in the reactants and in the products.   The subscripts of the reactants equal the subscripts of the products.

Q: A hydrate is a compound with water molecules incorporated into its crystal structure. In an…

A: The question is based on the concept of analytical chemistry.We need to calculate percentage of…

Q: Carbon dioxide gas reacts with solid calcium oxide to produce solid calcium carbonate (CaCO3). Write…

A: Calcium oxide will combine with carbon dioxide (for instance, in the air) at room temperature (about…

Q: Almost all boron atoms are found in two forms: boron-10 and boron-11. Both isotopes behave alike…

A: Given, Boron atoms are found in two forms: boron-10 and boron-11 Average mass of B = 10.81 amu

Q: Strontium has 4 isotopes: Sr84 with 0.56% abundance and AMU of 3.9134, Sr86 9.86% abundance with AMU…

A: Let x 1 and x2 be the abundance of Sr87 and Sr88 respectively. Then we have Strontium Isotopes…

Q: Determine the mass in grams of 8.72 × 10²¹ atoms of barium. (The mass of one mole of barium is…

A: We have 8.72*1021 atoms of Ba. Mass of one mole of Ba is 137.33 g We have to calculate the mass of…

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: A sample of Cu weighs 64.6 grams. Will a sample of Zn that contains the same number of atoms weigh…

A:

Q: Define weighted average and average in Chemistry and explain the difference between the two.

A: Average is a summation of quantities, divided by the total quantities, to get a single number. For…

Q: The element X has three naturally occurring isotopes. The masses (amu) and % abundances of the…

A: To find the average atomic mass, summing the masses of the elements isotopes, each multiplied by…

Q: Calculate the mass in grams of one mole of each of the following (the mass of a single item is given…

A: Given, moles= 1 eachMass per particle is given (assuming molar mass)To calculate, mass in g Formula…

Q: You have a compound with the formula X₂Y. X is an isotope with a mass of 20g/mol and Y is an isotope…

A: Mass of X = 20 g/mol Mass of Y = 43 g/mol

Q: Calculate the mass of H2SO4.

A: Mass of H2SO4 is 98.

Q: Antimony has two naturally occuring isotopes, Sb121Sb121 and Sb123Sb123. Sb121Sb121 has an atomic…

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Q: You discover a new element with a molar mass of 319.0 g/mol. How many atoms are contained in 97.9…

A:

Q: Two samples of sodium chloride with different masses were decomposed into their constituent…

A: The law of constant composition or law of definite proportions or law of definite composition states…

Q: Element X forms three different compounds with element Y. Information about these compounds is…

A: We have to predict the formula for the other two compounds.

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

A:

Q: Iron exists in nature as a mixture of predominantly three isotopes: ⁵⁴₂₆Fe (53.94 amu), ⁵⁶₂₆Fe…

A: We have to calculate the percentage of rarest of three isotopes.

Q: In a chemical reaction, do the elements involved change into different elements as the reaction…

A: In a chemical reaction ,do elements involved change into different elements as the reaction…

Q: 3) The law of constant composition says that all substances have the same composition that the…

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Q: Magnesium exists in nature as three stable isotopes. Suppose you determine that 9.87 moles of…

A: Given - Exact masses of isotopes of Mg 25Mg = 24.9858 amu 24Mg= 23.9850 amu. 26Mg = 25.9826 amu. To…

Q: In a chemical reaction, what happens to the total mass of the reactants and products? A) The total…

A: The chemical reaction follows the law of conservation of mass. According to the law of conservation…

Q: Be sure to answer all parts. Enter your answers in scientific notation. Calculate the number of…

A: The compound given is Ca3(PO4)2. Mass of Ca3(PO4)2 given = 9.75 g Molar mass of Ca3(PO4)2 = Atomic…

Q: Carbon reacts with 128 g of oxygen to form carbon monoxide. According to the law of multiple…

A: Given that, mass of oxygen = 128 g, Carbon reacts with oxygen to form CO The law of multiple…

Q: compounds with oxygen—six that are stable in air and others that are not. The mass of manganese per…

A: Manganese forms many stable oxides such as MnO, Mn3O4, Mn2O3, MnO2, MnO3, Mn2O7 and other manganese…

Q: Determine the mass in grams of 7.75 x 1021 atoms of carbon. (The mass of one mole of carbon is 12.01…

A: Given,the mass of one mole of carbon = 12.01 gNumber of carbon atoms = 7.75×1021 atomsHere, we are…

Q: All samples of a given compound, regardless of their source or how they were prepared, have the same…

A: The combination of various components to form compounds is regulated by certain fundamental laws.…

Q: i do know what else to do, that is the question

A: The law of definite composition states that any chemical compound will always contain a fixed ratio…

Q: The element chlorine has two naturally occurring isotopes. The isotopic masses and abundances of…

A: Recall the following expression to calculate average atomic mass of chlorine average atomic…

Q: An unknown compound has the following chemical formula: where x stands for a whole number.…

A: Chemical formula basically depicts amount of each element present in chemical compound in terms of…

Q: A compound is 32.88% C, 4.14% H, 19.18% N and 43.80% O by mass, and it has a molar mass of 219…

A:

Q: Two samples of sodium chloride with different masses were decomposed into their constituent…

A: Law of definite proportion :  The law states that a compound has its elements in a fixed ratio…

Q: A generic element, G, is composed of two isotopes, ¹32G and 128G. 132G has a natural abundance of…

A:

Q: Chemists generally use the term atomic weight rather than average atomic mass. We state in the text…

A: 1. Atomic mass indicates mass of an atom. Single atom has set of protons , neutrons and electrons.…

Q: A nutrition table lists apples with a potassium content of 4600 mg/pound. Assume an average apple is…

A: According to the given data, Mass of an average apple = 75.0 g Because, 454 g = 1 poundMass of an…

Q: According to the law of conservation of mass, which statement about chemical reactions is always…

A: Law of conservation of mass states that " the mass in an isolated system can neither be created nor…

Q: Identify as true (T) or false (F): | Minerals separating from flowing water as stony deposits…

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

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".