made-up compound: J2(QZ3)2 Determine the number of molecules of J₂(QZ3)2 in 7.2 grams of J₂(QZ3)2 Please refer to the Mini Periodic Table of Fake Elements to answer your questions O 8.21 x 1021 Avogadro's Number: 6.022 x 1023 O 0.0136 O 4.34 x 1024 Mini Periodic Table of Fake Elements O 2.29 x 1027 D 15.00 J 19.00 Q 35.00 Z 70.00

Q: Calcium chloride is 36.11% calcium. How many grams of calcium are present in 2.55 x 103 g of calcium…

A: The mass percent of the calcium in calcium chloride is = 36.11 % The mass of calcium chloride is =…

Q: An ionic compound MX3 is prepared according to the following unbalanced chemical equation.   M  +…

A: The number of moles of X2 (nX) is calculated using equation (1) in which N is the number of…

Q: Consider a 0.336 gram sample of H20 and determine the hydrogen's mass.

A: given :-  mass of sample of water = 0.336 g  To calculate :-  mass of H in the sample of water

Q: Complete the table. Element Mass Moles Number of Atoms Pt 0.0449 Fe 1.14 x 1025 Ti 23.8 mg Hg 2.05

A: Pt : Mass of Pt = moles x molar mass = 0.0449 x 195 = 8.76 g Number of atoms of Pt = moles x…

Q: 4.00 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have…

A: Given that, 4.0 g of a compound X is made of carbon, hydrogen and perhaps oxygen. The molecular…

Q: what is the molecular formula of the compound?

A: Given :-  Empirical formula =  C3H4NO2  Molar mass = 258.21 g/mol  To find out :- molecular formula

Q: A sample of hydrogen sulfide, H2S, had a mass of 51.00 g. Calculate the number of hydrogen sulfide…

A: Given, mass of H2S = 51.00 g number of H2S molecules = ? Note:  molar mass of H2S = 34.1 g/mol

Q: 3.43 x 10^24 Co atoms

A: Answer :. In one mole of Co the number of atoms = 6.023 × 1023 . Then in 5.699 mole of proton is…

Q: If you have 3.0 x 10^24 atoms of Sodium, how many grams of Sodium do you have?  Your conversions…

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

Q: A chemist decomposes samples of several compounds; the masses of their constituent elements are…

A: In order to calculate the empirical formula of each compound , we first need to convert the grams of…

Q: Elemental analysis of a compound with molar mass 214.22 g/mol gives the following mass percent…

A: Given data,Percent of C=72.89%Percent of H=4.71%Percent of O=22.41%Molar mass of…

Q: How many ATOMS of nitrogen

A: 1 mole of dinitrogen monoxide (N2O) contains 2 Nitrogen atoms and 1 Oxygen atom.

Q: The compound phthalic acid consists of carbon, hydrogen and oxygen. When a 1.969 g sample of…

A: First calculate the number of moles and mass for C and H. Use that to calculate mass of O and its…

Q: A sample of the male sex hormone testosterone, C19H28O2, contains 3.58×1021 atoms of hydrogen. How…

A: Given,Testosterone contains 3.58×1021 atoms of hydrogen.

Q: A drop of water, H2O, has a volume of approximately 0.050 mL. Assuming that the density of water is…

A: Given volume of 1 drop = 0.05 ml density of 1 drop = 1 g/ml number of drops = 3

Q: A certain organic compound has the formula C9H11O2.  A sample of this compound weighs 85.88 grams.…

A: The formula of the given organic compound is C9H11O2.  Mass of the compound=85.88 grams. The molar…

Q: calculate the mass of fluorine contained in 56.5 g of copper(II) fluoride.

A: Percent by mass (%w/w) = (mass of F/mass of CuF2) × 100%

Q: A new computer chip contains 4.71×1022 Si atoms. Determine the mass (in grams) of the silicon…

A: 1 mole of any substance contains avagadro number of atoms i.e.6.022×1023 atoms.  6.022×1023 atoms of…

Q: A 45.0-mg sample of boron reacts with oxygen to form 145 mg of the compound boron oxide. What is…

A: Empirical formula is the basic simple ratio formula of a molecule after finding the moles of that…

Q: A compound has an empirical formula of C 8H 15. If a sample of the compound contains 3.89 grams of…

A:

Q: 6.90 x 1024 formula units of sodium nitrite, NaNO₂ Express your answer with the appropriate units.…

A: Multiple  questions

Q: A laboratory analysis of an unknown sample yields 73.13% carbon, 7.38% hydrogen, and 19.49% oxygen.…

A:

Q: An unknown compound contains 53.34% rhodium, 9.338% carbon, and the rest is oxygen. a) If you assume…

A: Given a compound with the composition: Rh = 53.34 % C = 9.338 % O = 100 - (53.34 + 9.338) % = 37.322…

Q: A chemical reaction was used to produce 1.61 moles of copper (II) bicarbonate, Cu(HCO3)2. What mass…

A: Given data:

Q: A sample of oxygen has a mass of 25.2 grams. How many O atoms are there in the sample?  atoms How…

A: Calculation given as follows

Q: Tartaric acid is the white, powdery substance that coats sour candies such as Sour Patch Kids.…

A: To solve this problem first we find the mass of C , H and O  Then the number of mole of each to get…

Q: grams of hydrogen in 8.92 x 1022 molecules NH3

A:

Q: A compound has an empirical formula of C 8H 17. If a sample of the compound contains 4.90 grams of…

A: To solve this problem we will first find the number of moles of carbon from the given mass then…

Q: If you had 21.5 moles of silicon, how many atoms would you expect to have? And If you had 5.69 x…

A:

Q: A 0.652 g sample of a compound is found to contain 0.579 g of Cu and 0.0730 g of O. Which of the…

A:

Q: How many atoms are there in 350 g of arsenic?

A: Number of moles = mass/molar mass  1 mol = 6.022 × 1023 atoms

Q: Some of the formulas could be either molecular or empirical formulas; however, some can only be…

A: The molecular formulas are:

Q: A scientist is trying to discover information about an unknown metal in a compound. The formula for…

A:

Q: How many helium (He) atoms are there in 3.75 moles of helium?   3.75 x 1023 atoms 3.99 x 1025 atoms…

A: You have given - Moles of He = 3.75 mol

Q: A balanced chemical equation contains the term "2Ba(OH)2-8H₂O", which is used as a lubricating…

A: Given: The coefficient of  is 2.

Q: Determine the mass of 0.0146 mol KOH mass = ___ g Determine the mass of 10.2 mol ethane (C2H6)…

A:

Q: A scientist is trying to discover information about an unknown metal in a compound. The formula for…

A: We have to calculate molar mass of metal and it's identity.

Q: This is the chemical formula for iron(II) hydroxide: Fe(OH)2. Calculate the mass percent of oxygen…

A:

Q: A scientist is trying to discover information about an unknown metal in a compound. The formula for…

A: Step - 1Formula for the compound = XBr3Means in 1 mol of compound 3 mol of Bromine are…

Q: The mass, in grams, of 1.5 x 10-2 mol of CdS. The number of moles of hydrogen in 86.6 grams of…

A:

Q: What is the mass of 7.10 moles of magnesium chloride, MgCl2? Express your answer with the…

A: 1) The compound given is MgCl2 with moles = 7.10 mol Since molar mass of MgCl2 = Atomic mass of Mg +…

Q: What mass of Na2CO3 would contain 2.50 x 1025 sodium (Na) atoms? Express your answer in units of…

A:

Q: 2 Zn + Pb(NO3)4 = Pb + 2 Zn(NO3)2 Determine the number of grams of zinc, Zn, needed to yield 35.1 g…

A: Given: Mass of lead = 35.1 g

Q: A scientist is trying to discover information about an unknown metal in a compound. The formula for…

A:

Q: a sample of male testosterone C19H28O2 contains 3.88*10^21 hydrogen atoms. How many atoms of carbon…

A: Given : Number of hydrogen atoms in C19H28O2 = 3.88 X 1021 atoms.

Q: Part A. What is the mass of 9.50 moles of magnesium chloride, MgCl2? Express your answer with…

A: Part A: Calculation of mass of MgCl2 : The number of moles of MgCl2 = 9.50 moles The mass of a…

Q: How many moles of nitrogen, N, are in 81.0 g of nitrous oxide, N₂O? Express your answer with the…

A:

Q: A certain chemical substance has the following percent composition by mass. Element Mass Percent…

A: → For calculating Empirical formula for compound we follow these     steps :-i Calculate %Atomic…

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.