For our experiment, we use the starting mass of the Mg to determine the moles of H2 produced and NOT the volume of HCl. Why are we able to do that? Be sure to show a calculation to back up your answer.

Q: How many grams of ammonia (NH3) will be required to produce this amount of nitrogen

A: Balanced equation:               2NH3 - 3H2 + N2 Moles of N2 =16.16g/28gmol-1 =0.8978mols

Q: many oxygen atoms are in 5.34 x 10 grams LiHSO3? Hint: must use Avogadro's number

A:

Q: Sea salt is formed by natural evaporation of ocean water and contains 98% sodium chloride. The…

A: Mass of sodium Chloride can be calculated as :

Q: 0.279 g of the hydrate CoCl2•nH2O is heated to produce 0.197 g of anhydrous CoCl2 (MM = 129.83…

A: Given: Mass of hydrate = 0.279 g Mass of anhydrous CoCl2 = 0.197 g Molar mass of CoCl2 = 129.83…

Q: How many hydrogen atoms are in 92.62 g (NH4)2SO4?

A:

Q: How was the empirical formula mass of 141.94g/mol found? What are some easy steps I can use so I…

A: Given: Empirical formula =P2O5. We have to find empirical formula mass.

Q: How many K atoms are present in 3.48 g of KOH formula units? Express your answer in scientific…

A: In order to find the number of potassium atoms present we first write down the given data: Mass of…

Q: Given the reaction: Sa + F2 --> SF6. How many grams of SF6 will be produced if you start with 551.1…

A:

Q: A. Empirical Formula of Magnesium Oxide 1. Mass of crucible plus magnesium 25.748 2. Mass of…

A:

Q: determine the mass (g) of carbon in 16.55 g of glucose. Plan To find the mass of C in the sample of…

A: We know that, Molecular mass of glucose, C6H12O6 = 180.156 g/mol Number of Carbon atoms in glucose =…

Q: Determine the mass, in grams, of 0.445 moles of Mn (1 mol of Mn has a mass of 54.94 g). with the…

A: The amount of moles in a substance can be determined by using its Molar mass. The molar mass is the…

Q: What is the number of mole for 4.3 g of CH4? please only type the answer without the unit Answer:

A:

Q: When I submit this answer to my homework software I receive the message "Your mole ratio between H2…

A:

Q: Calculate the number of moles in the sample and iron atoms in the sample.

A: Given :- mass of iron = 15.7 g  To calculate :-  moles of iron  number of atoms of iron  number of…

Q: A mixture of 134.6 g of Cl, and 29.4 g of P reacts completely to form PCl, and PCl,. Find the mass…

A: Consider the balanced reaction of Cl2 with P to give PCl3 and PCl5 is as follows; Reaction:…

Q: Calculate Find the number of moles in 508 g of ethanol (C,H,O).

A: 27.  Given :- mass of ethanol (C2H6O) = 508 g  To be calculated :- number of moles of ethanol…

Q: Convert 691.3 molecules of methane into moles. Your answer should have 4 sig. figs.   I know the…

A: The number of molecules in one mole of compound is equal to the Avogadro’s number.

Q: Determine the correct mole ratios, yes, you will select more than one, for the following balanced…

A: By the help of stoichiometric coefficient we can find the amount of unknown substance by the help of…

Q: Mass of zinc = 1.050 g.     Calculate the number of moles of zinc in the 250 mL flask. please…

A: Mass of Zn = 1.050 g  Volume of solution = 250 ml  Number of moles of Zn = ?

Q: (a) What is the empirical formula for X? Click here to enter or edit your answer (b) What additional…

A: Empirical formula The empirical formula is the molecular formula of the compound that represents the…

Q: Be sure to answer all parts. How many molecules of ethane (C,H) are present in 0.413 g of C,Hg? x…

A: The molar mass of ethane is,

Q: number of moles

A:

Q: Mass of product…

A: Mass is both a real body property and a measure of its resistance to motion when a net force is…

Q: Please calculate the mass in grams for:  8.0 mol lead oxide (PbO)

A: Molar mass of Pb = 207.2 g/mol  Molar mass of O = 16g/mol

Q: Does one mole of K and one mole Ti have the same amount or a different amount of atoms? Explain your…

A: Avogadro number = 6.02×1023

Q: Mass Number of atoms 1 atom of Mg amu atom(s) Katomic mass from the periodic table) 1 atom of Mg…

A:

Q: Determine the amount (in moles) of 162.84 mg of calcium acetate.

A: Determine the amount (in moles) of 162.84 mg of calcium acetate ?

Q: Without using a calculator, which has the greater mass: One mole of carbon atoms or one mole of…

A:

Q: Use the moles of carbonate ion, CO,²-, to determine the moles of MgCO, and CaCO, present in the…

A: Part 1 :  a.) As in limestone there are both CaCO3 and MgCO3 . So CO32- will come from both CaCO3…

Q: • Part B How many grams of NH3 can be produced from 4.05 mol of N2 and excess H3. Express your…

A: Given N2=2.05 mol The quantity of ammonia has to be calculated in grams so that it can be produced…

Q: minutes

A:

Q: HCI(aq) + NaHCO3(aq)→H2CO3(aq) + NaCl(aq) If you want to produce 18.48 grams of NaCl how much NaHCO3…

A:

Q: Question 40

A: The given molecules are, CaSO4, Al2(SO4)3 and K2SO4

Q: 1. Suppose that in the experiment of the empirical formula 10% of the metal (Mg) stays unreacted and…

A: Magnesium being a metal reacts with oxygen to form magnesium  oxide.

Q: How many moles of Al are necessary to form 84.0 g of AlBr₃ from this reaction: 2 Al(s) + 3 Br₂(l) →…

A:

Q: Calculate the mass (g) and moles of the alcohol sample.

A: 2.) Mass can be calculated using volume and Density .  Moles can be calculated using mass and molar…

Q: B3b. MOLES OF SALT Set 1 Set 2 Half mass Set 1 Half mass Set 2 Salt moles (mol) 3 3 3 3 (Unrounded)…

A: Given that : We have to calculate the moles of the salt used for the given data :

Q: Please check my work on percent composition (chemistry.) 1. Use the Percent of Al, Si, and O to get…

A: In this question, we will determine the Empirical formula of the compound  For, the empirical…

Q: 4) 4.00 mole H,0 to grams 5) 815 grams Cal(OH), to mole

A: For 4) moles of H2O = 4.00mol   We know that, molar mass of H2O = 18gNow,mass of H2O = no of moles x…

Q: How many moles are in 100. g of Xe(OH),? Show Your Work

A: We have to calculate number of moles in 100 gram of Xe(OH)2.

Q: mass

A:

Q: 24. How many moles are there in 2.0 x 10^(22) molecules 02? O 0.063 moles O 0.053 moles O 0.043…

A:

Q: A mixture of 118.6 g of Cl2 and 25.9 g of P reacts completely to form PCl3 and PCl5. Find the mass…

A:

Q: 目 Using the chemical equation above, solve the problem listed below: How many grams of Li,SO, would…

A:

Q: Be sure to answer all parts. How many molecules of ethane (C,H) are present in 0.709 g of C,Hg? x 10…

A: The number of moles means the number of molecules divided by the Avogadro's number (NA) Or, a number…

Q: Determine the correct mole ratios, yes, you will select more than one, for the following balanced…

A: Answer

Q: A student calculated the number of moles of carbon dioxide present in a 100.0 g sample of a gaseous…

A: Percentage composition of an element is calculated from its molecular mass. Percentage composition…

Q: Question attached

A: Empirical formula refers to the formula of a compound in which the elements are present in the…

Q: Determine the mass, in grams, of 0.295 moles of Mn

A: Given :- number of moles of Mn = 0.295 mol  To calculate :- mass of Mn (in g)

Q: Predict how many moles of CaO he should have ended up with, using the following steps. Given that…

A: Given, Amount of CaCO3 = 5.0 g Molar Mass of CaCO3 = 100 g/mol Formula Used:

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.