Is wood a metal or nonmetal? 2. Is melon a metal or nonmetal? 3. How many protons, electrons and neutrons are in Wo2-? 4. How many protons, electrons and neutrons are in Me3-?

Q: Question 3

A: In the compound KrF2, 2 moles of F are present.The molar mass of KrF2 is 121.8g/mol.  Molar mass of…

Q: A sample of copper (II) nitrate hydrate has a mass of 1.278 g. The sample is heated until all water…

A: Given , mass of copper (II) nitrate hydrate= 1.278 g        mass of anhydrous copper (II) nitrate  =…

Q: 2) Determine the mass of each sample: a) 1.32 mol carbon tetrafluoride b) 0.555 mol magnesium…

A:

Q: A brass alloy contains 78.9% copper, Cu, by mass with the remainder of the alloy being zinc, Zn.…

A: We have to predict the moles of Zn and atoms of Zn.

Q: 3. What mass of Al contains the same number of atoms as 3.0 g Pb7 a. 23 g b.0.014 g C. 3.0g d. 0.39…

A: 3. mass of Pb = 3.0 g molar mass of Pb = 207.2 g/mol moles of Pb = 3.0 g / 207.2 g/mol…

Q: Calculate the mass in grams of each sample. (a) 5.94 × 1020 H,O2 molecules (b) 2.8 × 1022 SO2,…

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: 3)A pure copper sphere has a radius of 0.935 in. How many copper atoms does the sphere contain? The…

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Q: Please solve a, b, c thank you

A: Lead(IV) selenite is Pb(SeO3)2  Molar mass of compound = 461.2 gm/mol  Mass of compound = 12.47 gm

Q: 7. How many sodium atoms is equal to five moles of the atoms? а. 5 b. 3.011 x 1024 с. 500 d. 6.022 x…

A: Mole represent  amount of substance present in any matter.

Q: Which of the following has more atoms: 3.55 g ef lithium atoms or 19.1 g of nickel atoms?

A: Mass of lithium = 3.58 g Mass of nickel = 19.1 g

Q: The reaction of sulfur powder (S8) with oxygen gas (O2) results in the formation of one of many new…

A: We know that, molar mass of O = 15.999 g/mol molae mass of S = 32.065 g/mol

Q: The ratio of the mass of O to the mass of N in N20z is 12:7. An- other binary compound of nitrogen…

A: The given ratio of mass O to the mass of N in N2O3 is 12:7 Mass of O in N2O3 = 3x16 amu…

Q: If 10 magnesium(Mg) atoms and 10 chlorine(Cl) atoms were to bump into each other, coukd they combine…

A: If 10 atoms of magnesium and 10 atoms of chlorine bump into each other, they will combine to form a…

Q: An organic compound has a molecular mass of 329.0 amu and contains 72.95% carbon by mass. How many…

A: The ratio of mass of particular element to the total mass of compound multiply by 100 is known as…

Q: An iron-containing compound is 20.1% Fe, 11.5% S, 63.3% O, and 5.1% H. What is the empirical formula…

A: The empirical formula is the simplest ratio of the element present in the given molecular formula…

Q: Which of these statements is FALSE about the mole? O a. 1 mole is equal to 6.022 x 10 23…

A: Since you gave posted multiple questions, we are entitled to answer the first only.

Q: A sample of C3H8C3H8 has 8.88×1024 H8.88×1024 H atoms. (1) How many carbon atoms does the sample…

A: We have given the sample that contain 8.88×1024 H atoms.   1 Mole of  C3H8≡  3 Mole of Carbon   and…

Q: Diamond is one form of elemental carbon. An engagement ring contains a diamond weighing 1.25 carats…

A: The mass of 1.0 g is equal to 1000 mg. The mass of diamond in g is calculated as shown below.

Q: ow many total atoms of Ba I ow many total atoms of N ow many total atoms of O ow many total atoms of…

A: Solution- In the below given -  Total atoms of Ba = 3 Total atoms of N =  6 Total atoms of O = 26

Q: What information must a chemist have to determine the molecular formula for a compound?

A: Molecular formula is the actual number of atoms of each element in the one molecule of the compound.

Q: Find the total number of atoms in a sample of cocaine hydrochloride, C17 H22 CINO4, of mass 24.0 mg…

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Q: Rubudium have two isotopes, 85Rb has mass 84.9117 amu and 87Rb has mass 86.905 amu. If the average…

A: The naturally occurring Rubidium  has two isotopes, therefore both of them are present in Rubidium…

Q: 1. Calculate the mass of each sample. a. 1.05 x 10 26 atoms of neon, Ne(g) b. 8.72 x 1021 molecules…

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Q: What is the molecular formula of a compound if the empirical formula is C,H, and the approximate…

A: Molecular formula: In a molecular formula we describe the number of atoms of all the elements…

Q: Number of atoms of C in 6 moles of C,H10 are: O 24.09x10^23 O 36.13x10^23 O 2.49x10^23 O…

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Q: 4. Complete the following table Mass Moles Particles 3.65 moles Mg 29.54 g Cr 3.54 x 1025 atoms P…

A: Mass = Molar mass * Moles The no of particles in 1 mole = 6.023*1023

Q: Vitamin A has the molecular formula C20H300. How many carbon atoms are in 6.02 x 1023 molecules vit…

A: As molecular formula of vitamin A is C20H30O . Thus in one vitamin A molecule  has 20 carbon atoms .…

Q: If a sample of ethanol has a mass of 1.34 x 104 mg, d) How many C atoms are in the sample? e) How…

A: Stoichiometry involves the calculation of concentration of solutions in the given conditions of…

Q: How do you find the net ionic formula of 3 BaCl2.2H2O (aq) + 2 Na3PO4.12H2O (aq) -----> 6 NaCl (aq)…

A: The ionic equation can be written as follows:

Q: You have 53 carbon atoms. What is the mass? Which units should you use g/mol or amu? a. 686.58 amu…

A: Answer: No option is correct. The correct answer is 636.53 amu We should use amu unit instead of…

Q: A brass alloy contains 78.6% copper, Cu, by mass with the remainder of the alloy being zinc, Zn.…

A:

Q: Find the total number of atoms in a sample of cocaine hydrochloride, C17H22ClNO4, of mass 22.0 mg.

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

Q: 2. Law of Definite Proportion. When 60.0 g of carbon is burned in 160.0 g of oxygen, 220.0 g of…

A:

Q: 31. Write the formula for the compound formed when these elements are reacted a. Al and S b. Mg and…

A: a.) Al2S3  b) Mg3P2  c) Na3N

Q: 1. How many ATOMS of carbon are present in 7.87 grams of carbon tetrabromide, CBR4? atoms of carbon

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

Q: The average atomic mass of carbon is 12.011 amu. Assuming you were able to pick up only one carbon…

A: Given that, the average mass of carbon is 12.011 a.m.u. The given mass of any of the carbon isotopes…

Q: An iron-containing compound is 20.1% Fe, 11.5% S, 63.3% O, and 5.1% H. What is the empirical formula…

A: First of all, we will calculate the number of moles of each element from given mass and then, we…

Q: What mass of Chromium metal would contain 5.00 x 1020 atoms of Cr? 0.0432 g

A:

Q: What are the formulas of the following substances? (a) PCI;; Molec. mass = 137.3 amu (b) Nicotine,…

A: Molar mass is defined as an average mass of atoms present in the chemical formula. It is the sum of…

Q: Iron is a metallic element, find the number of proton, -2 Fe electron and neutron 3- Write the…

A: In an neutral atom number of Protons must be equal to number of electrons Given : Atomic number of…

Q: a. An element (X) is found in the (4th row & 6th group) of the periodic table. Write the symbol of…

A: We have to find the element X in given questions

Q: A brass alloy contains 87.7% copper, Cu, by mass with the remainder of the alloy being zinc, Zn.…

A:

Q: Tetracarbon dioxide is an unstable oxide of carbon with the following molecular structure: What are…

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Q: A sample of C3H8 has 8.00×10^24 H atoms. How many carbon atoms does the sample contain?  What is…

A: Given :- number of H atoms = 8.00 × 1024 atoms  To be calculated :-  No. of C atoms in sample…

Q: A hypothetical compound has the formula X(AZ3)3.   The atomic masses for A, X and Z are included in…

A: Given: The atomic masses for A, X and Z are included in the table. Element Atomic mass (amu) A…

Q: The Avogadro number is defined as A The number of electron in 12g of C-12 substance B The number of…

A: The question is based on the concept of avogadro  number. we have to correctly identify the…

Q: Which one of the following statements about the compound C3H4 is CORRECT? Oa. One mole of C3H4…

A:

Q: - How many oxygen atoms are there in one formula unit of Ca2+?

A: Determine oxygen atom in formula unit of Ca2+?

Q: In a lab experiment, 5.2 g of Mg reacts with sulfur to form 12.1 g of magnesium sulfide. How much…

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

Q: TRUE or FALSE A mole is the amount of a substance that contains as many elemental entities as…

A: Ans. TRUE The value of the mole is equal to the number of atoms in exactly 12 grams of pure…

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.