A 25.3-g sample of an unknown compound contains 0.8 g of oxygen. What is the percent by mass of oxygen in the compound?

Q: An automobile gasoline tank holds 21 kg of gasoline. When the gasoline burns, 84 kg of oxygen is…

A: Law of conservation of mass: Mass can neither be created nor be destroyed. But transforms only from…

Q: 50. A 56-g sample of iron reacts with 24 g of oxygen to form how many grams of iron oxide?

A: Interpretation - A 56 g sample of iron reacts with 24 g of oxygen to form iron oxide. The grams of…

Q: nd contains 12.4g of hydrogen. What is the percent by mass of hydrogen in the compound?

A: Given A 37.1 g sample of an unknown compound contains 12.4g of hydrogen. What is the percent by mass…

Q: which of these would most likely be an gram equivalent mass of copper?

A: 1 Faraday is defined as the amount of electric charge responsible for deposite or dissolve 1 gram…

Q: The mass of 1570 cm³ of tungsten.

A: 2.  a) given :- volume of tungsten = 1570 cm3  To calculate :- mass of tungsten

Q: How many moles of water are in 1.00 L of water, whose density is1.00 g/mL?

A:

Q: If you have a sample of 0.3154g of air and air is 78.0% nitrogen, by mass, what is the mass of…

A:

Q: 10) In a round-bottom flask, a chemist completely reacts 4g of hydrogen with 25g of chlorine. What…

A: Mass of hydrogen = 4 g Mass of chlorine = 25 g Total mass of the compounds = 29g

Q: A sample of sodium reacts completely with 0.213 kg of chlorine, forming 351 g of sodium chloride.…

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Q: e mass of 1

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Q: An automobile gasoline tank holds 21 kg of gasoline. When the gasoline burns, 86 kg of oxygen is…

A: The reaction that depicts the burning of gasoline is as follows,

Q: If 0.750 g of orange mercury oxide decomposes to 0.695 g of liquid mercury and oxygen gas, what is…

A: Given data contains, Mass of mercury oxide is 0.750 g. Mass of liquid mercury is 0.695 g.

Q: What is Kc?

A: Interpretation: The information about Kc is to be provided.

Q: What is the percent by mass of F?

A: Percent by mass of F = (mass of F/mass of compound) × 100%

Q: A sample of metal weighing 4.28 g is combined with oxygen; the metal oxide weighs 40.9 g. The mass…

A: Mass percentage is one way of representing the concentration of an elements or components in…

Q: e mass of c

A:

Q: A 33.5 metric ton sample of ore yields 2.95 metric tons of iron. What is the percent of iron in the…

A: Given that,Mass of ore sample = 33.5 metric tonMass of iron = 2.95 metric ton

Q: In a reaction, 34.0g of chromium(III) oxide reacts with 12.1g of aluminum to produce chromium and…

A: 34.0g of chromium(III) oxide 12.1g of aluminum Both of these react to produce 23.3g of chromium and…

Q: A compound of copper and sulfur contains 88.39 g of metaland 44.61 g of nonmetal. How many grams of…

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Q: In the combustion reaction between propane and oxygen gas, if 44.0 g of propane is burned in 160.0g…

A: According to the rule of conservation of mass, the total mass of the reactant equals the entire mass…

Q: t mass

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Q: 6.35 x10 to the 22nd power molecules of H2SO4 then how many grams of H

A: Number of mole and number of particles are related to each other as follows:Where, NA is avogadro’s…

Q: In a reaction, 34.0 g of chromium(III) oxide reacts with 12.1 g of aluminum to producechromium and…

A: Given data, The balanced chemical equation is given below, The mass of chromium(III) oxide = 34.0 g…

Q: When 10.0 g of ice melts into water, how many grams of water are produced?

A: The mass of any substance is not changed during the phase change, but the volume may change. So 10.0…

Q: How many moles does 120.30 g lithium represent? Use correct significant figures and units.

A: The number of moles of an element present in a given amount is calculated by using the following…

Q: e mass of

A:

Q: A student add 15g of baking soda to 10g of acetic acid in a beaker. A chemical reaction occurs and a…

A: Baking soda : NaHCO3 ACETIC ACID : CH3COOH

Q: 1. A student measured a 6.790 g sample of a hydrated salt. After heating, the mass of anhydrous salt…

A: a. Given that weight of hydrated salt is 6.790 g and mass of anhydrous salt is found to be 4.501 g.…

Q: a chemist has 19.50g alcohol. what is the volume of the sample, what additional information is…

A: The volume of a given liquid is defined as the amount of the space occupied by the liquid that fully…

Q: A 28.0-g sample of nitrogen gas combines completely with 6.0 g of hydrogen gas to form ammonia. What…

A: Nitrogen gas reacts with hydrogen gas to form ammonia. Write the complete reaction. N2g+3H2g→2NH3g

Q: 1. Calculate the mass of mercury(II) oxide

A: Given :- volume of O2 = 36.0 mL  Temperature = 50.0 °C  Pressure = 1 atm  To calculate :-  Mass of…

Q: High-density lipoprotein (HDL) cholesterol is the “good” cholesterol because adequate levels reduce…

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Q: A sample of 508.4 g of copper completely reacted with oxygen to form 572.4 g of a copper oxide…

A: Given : Mass of copper reacted = 508.4 g And mass of copper oxide produced = 572.4 g

Q: Hot water mass 2. Total water mass

A: Given that, Volume of hot water at 40°C V1 = 100 mL Density of water at 40°C  = 0.9932 g/mL Final…

Q: A student measured a 6.790 g sample of a hydrated salt. After heating, the mass of anhydrous salt…

A: a) Given that weight of hydrated salt is 6.790 g and mass of anhydrous salt is found to be 4.501 g.…

Q: t mass of oxygen is

A:

Q: A compound of copper and sulfur contains 88.39g of metal and 44.61g of nonmetal. How many grams of…

A: In order to calculate mass of copper in the new compound, first, we need to calculate the ratio of…

Q: The density of MgO is 3.6 g/cm3. The atomic masses of magnesium and oxygen are 24.31 g, and 16 g,…

A: Given that Density of MgO = 3.6 g/cm3 Molecular weight of MgO = (1* 24.31) + (1 *16) = 40.31 g/mol

Q: What is the unit of energy? Select one: a. Joules b. Newton c. Kilograms d. moles

A: What is the unit of energy?

Q: How much would a 138g piece of iron occupy?

A: Density of a substance is defined as the ratio of mass of substance and volume of that substance.…

Q: y grams of i

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Q: The mass of 1570 cm³ of tungsten

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Q: Stainless steel is composed of iron, manganese, chromium, and nickel. If a 2.00 g sample was…

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Q: A sample of metal weighing 1.4 g is combined with oxygen; the metal oxide weighs 33.5 g. The mass…

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Q: If 45.0 gg of gray iron powder reacts with 24.9 gg of red phosphorus powder, what is the mass of the…

A: First convert mass into mole by diving molar mass respectively Then Calculate limiting reagent by…

Q: Commercial aqueous nitric acid has a density of 1.42 g/mLand is 16 M. Calculate the percent HNO3 by…

A: Given, the density of a solution, d = 1.42 g/mL The molarity of a solution = 16 mol/L Now calculate…

Q: In a reaction, 33.4 g of chromium(III) oxide reacts with 11.9 g of aluminum to produce chromium and…

A: The reaction taking place is between chromium (III) oxide i.e Cr2O3 and aluminium i.e Al to produce…

Q: WHICH WEIGHS MORE 1 MOLE OF CARBON OR 1 MOLE OF SULFUR?

A: Mole is the amount of the substance that contains the same number of particles or atoms or…

Q: If 45.98 g of sodium combines with an excess of chlorine gas to form 116.89 g of sodium chloride,…

A: Limiting reagent is the reagent which is consumed in the chemical reaction completely. It decides…

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".