If 20.0 grams of Ca combines completely with 16.0 grams of S to form a compound, what is the percent composition of Ca in the compound?

Q: A 20.00 g mixture of magnesium and zinc metal reacting with excess hydrochloric acid produced 1.042…

A: Mass of hydrogen gas produced = 1.042 g Molar Mass of hydrogen gas = 2.016 g/mol   moles of hydrogen…

Q: An automobile gasoline tank holds 42 kg of gasoline. Whenthe gasoline burns, 168 kg of oxygen are…

A: Given information: Mass of gasoline = 42 kg Mass of oxygen = 168 kg

Q: Suppose the percent yield of NaCl (formed in a combination reaction of sodium with chlorine) is…

A: The equation for the reaction of sodium and chlorine is, 2 Na + Cl2 →2 NaCl The moles of Na in 39.34…

Q: what is a definition of a mole

A: A mole corresponds to the mass of a substance that contains 6.023 x 1023 particles of the substance.…

Q: A 20.00 g mixture of magnesium and zinc metal reacting with excess hydrochloric acid produced 1.402…

A:

Q: A grain of maize pollen has an average mass of 250 ng. How much would a mole of these pollen grains…

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to…

Q: A 20.00 g mixture of magnesium and zinc metal reacting with excess hydrochloric acid produced 1.372…

A: The number of moles of hydrogen (H2) gas, nH2, is; nH2=mH2MMH2=1.372 g2.016 g/mol=0.681 mol

Q: 1.39 mol Nal is used in a reaction.  What is the mass of Nal present?

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Q: A 20.00 g mixture of magnesium and zinc metal reacting with excess hydrochloric acid produced 1.442…

A:

Q: A student weighs out 94.53 grams of sodium permanganate, NaMnO4.  How many moles of NaMnO4 is this?…

A: Moles— It is the ratio of given mass of a compound to its molar mass  Mole = given mass / molar mass…

Q: A 20.00 g mixture of magnesium and zinc metal reacting with excess hydrochloric acid produced 1.092…

A: MZn + MMg = 20 g Mass of Zinc, MZn = X g Mass of magnesium, MMg = (20 – X)g Mass of Hydrogen gas =…

Q: The number of moles of atoms in one mole of carbon dioxide gas, CO2, is

A: Given :- number of moles of CO2 = 1 mol  To calculate :- number of moles of atoms in 1 mol CO2

Q: A reaction between nitrogen and hydrogen forms ammonia (NH3). If 15.62 grams of nitrogen is reacted…

A:

Q: A small winery is expected to produce 685 bottles of wine this year. If the actual amount of wine…

A: Given Actual yield and expected of bottles of wine in the year. To find Percent yield of wine…

Q: How many mol of lead (Pb) atoms are equivalent to six billionlead atoms?

A: We know that 1 billion = 109 So, 6 billion = 6×109 Atomic weight of lead (Pb) = 207

Q: The percent by mass of iron (III) in Fe₂S3 is %.

A: we have to calculate the mass percentage of Fe(III)

Q: the chemical formula for hydrogen, chloride istet. A chemist, measured the amount of hydrogen…

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Q: What is the percent composition of carbon in carbon dioxide?

A: Required percent composition of carbon in carbon dioxide.

Q: If MnO2 at 0.86 moles and HCl at 48.2 g react as follows, which reactant is the limiting reactant.…

A: The limiting reagent is a substance whose mole to stoichiometric coefficient ratio is the least.

Q: What is the mole ratio of all the substances represented in this figure?

A: A mole ratio can be described as ​the ratio between the amounts in moles of the any two compounds…

Q: What is the amount, in moles, of each of the following substances?

A: Moles of the substance can be calculated by using the formula given below as; Moles = Given…

Q: When nitrogen gas reacts completely with hydrogen gas, the resulting compound is gaseous ammonia. If…

A: A balanced is defined as the equation where equal numbers of total individual atoms are present on…

Q: What percent by mass of iron(II) phosphate is iron?

A: The molecular formula of Iron(II)phosphate is Fe3(PO4)2. Percentage by mass of any component can be…

Q: What is the mass of 1 mol of molecules for a compound?

A: Molar mass :-             It is the mass of a compound or sample of that compound is sum of mass of…

Q: In the chemistry lab stockroom, there is more than enough hydrogen gas for the reaction , but only…

A:

Q: A 20.00 g mixture of magnesium and zinc metal reacting with excess hydrochloric acid produced 1.242…

A: The reactions occurring in the system are written below.

Q: en moles of hydrogen sulfide, H2S, would consist of how many molecules?

A: Solution :   Avogadro's number represents the number of molecules present in a unit of a mole of any…

Q: How many molecules are contained in a glass that holds 250 g of water? How many moles does that…

A: Number of moles is given by the ratio of mass of the substance to that of the molar mass of the…

Q: Copper has become an expensive metal to purchase.If you needed 0.050 moles of copper, how many grams…

A: Moles , molar mass and mass of a substance are related as Moles = mass/molar mass

Q: a 16.9 mol sample of argon has what mass in grams?

A: One mole of a species contains avagadro number of entities such as atoms , molecules and ions .

Q: the moles of gl

A:

Q: A student is given 212 grams of potassium. What is the molar mass?

A: Since a student given 212 gm of Potassium (K).

Q: A 78.0-g sample of an unknown compound contains 12.4 g ofhydrogen. What is the percent by mass of…

A: Given: Weight of the compound = 78 g Weight of hydrogen = 12.4 g The calculation of the % by mass is…

Q: Starting with 1.550 g of potassium chlorate, a student releases 0.617 g of oxygen gas. If the…

A: Given: The mass of potassium chlorate taken = 1.550 g The mass of oxygen gas released = 0.617 g The…

Q: what is Percent Composition?

A: Mass percent :- The mass of a component in grams present in 100 grams of the mixture is defined as…

Q: what mass of sodium hydroxide has the same number of oxygen atoms as 130g of barium dihydrogen…

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Q: Calculate the mass of phosphorus requi

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Q: What are the units for molar mass? * O mol O amu O grams O amu/mol O amu/grams O grams/mol O…

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Q: Assume you have 38.0 grams of CO (carbon monoxide), which is a molecular compound. How many…

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Q: y moles of H

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: If the company chemist calculated that 12,163 g of NH3 should be produced, what is the percent…

A: Percent yield = (actual yield/theoritical yield) × 100 %

Q: The percent by mass of chlorine in is C,H; Cl %.

A:

Q: Molar mass is the relationship between ____________. A. grams and liters B. moles and grams…

A: Since molar mass is defined as mass of substance in grams in 1 mole of it.

Q: What is the percent composition of each element in calcium phosphate?

A: We have to calculate the percentage composition of each element in calcium phosphate.

Q: Barium and phosphorus react with each other in a synthesis reaction. If 0.2856 g of phosphorus…

A:

Q: Consider the reaction of solid aluminum iodide and potassium metal to form solid potassium iodide…

A: Given : Percent yield=91.0% Actual amount of aluminium=108.75 g To find : Mass in grams of aluminium…

Q: A Student is given 212 grams of your potassium. What is the molar mass?

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to…

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.