When molecules are represented by molecular models, what does each sphere represent? How big is the nucleus of an atom in comparison to the sphere used to represent an atom in a molecular model?

Q: is formed when elements combine. The COIna chemical reaction a new Different elements combine to…

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Q: In the structure given below, the total number of Hydrogen and carbon atoms are: 9, 6 10, 7 10, 6 O…

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Q: A mole of a substance is defined as the amount of substance contained in 12 grams of carbon the…

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Q: Complete the table. Element Mass Moles Number of Atoms Na 38.5 mg C 1.12 V 214 Hg 1.44 kg

A: Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If…

Q: Calculate the mass of H2SO4.

A: Mass of H2SO4 is 98.

Q: How many atoms are there in formula AL2O3? (aluminum oxide

A: SOLUTION:Step 1: In the given Formula Al2O3 (aluminum oxide), there are two aluminum atoms and 3…

Q: How many oxygen atoms are in each chemical formula? (a) H3PO4                                  (b)…

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

Q: The molecular formula of Aspirin is C9H;O4. How many Aspirin molecules are there in a table that…

A: Given that:  Mass of aspirin = 200mg = 200mg×1g/1000mg = 0.2g Molar mass of C9H8O4 =…

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: What mass of ammonia gas (NH3) contains 2.81 ✕ 1024 hydrogen atoms?

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Q: A drop of water has a volume of approximately 6×10−2 mL . How many water molecules does it contain?…

A: Relation between mass and number of molecules is:

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: Use the References to The formula for sulfur dioxide is SO2. a. How many molecules are in 2.70 grams…

A: a. Here, we have to find the number of sulfur dioxide molecules present in 2.70 g of SO2. b. Here,…

Q: What are the basic units-single atoms, molecules, or for- mula units-that compose each substance?…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: One mole of copper has a mass of 63.5 grams. Approximately how many atoms of copper are present in…

A: Given  Number of mole = 1 mole  Number of atoms of copper = ?

Q: If there are 7.28 x 1022 molecules in a sample of CH4, what is the mass of this sample in grams? O…

A: Molecular wt. of CH4 = Molecular Wt. Of C + (4 * Molecular wt. of H) = 12 g/mole + (4 * 1 g/mole ) =…

Q: 6. How many oxygen atoms are in 225 g oxygen gas? a. 4.23 x 104 C. 8.47 x 10:+ b. 6.84 x 10²4 d.…

A: The Given amount of oxygen gas O2 = 225 grams        the molar mass of O2 = 32 g/mol To calculate…

Q: 19. Nicotine is the component in tobacco that makes smoking addictive. The structure of nicotine is…

A: The nicotine molecule consists of 14 Hydrogen atom (s), 10 Carbon atom (s) and 2 Nitrogen atom (s) -…

Q: Find the mass of 1 molecule of NO in gram. а. 4.98 х1023 b. 30 C. 4.98 x10-23 d. 15

A: According to mole concept, mass of Avogadro number (6.022 × 1023) of molecules is equal to the molar…

Q: 105: A drop of water has a volume of approximately 0.05 mL. How many water molecules does it…

A: 105. Given that,  Volume of 1 drop of water = 0.05 mL Density of water = 1 g/mL Mass of 1 drop of…

Q: A 3.17 g sample of nitrous oxide (an anesthetic sometimes called laughing gas) contains 4.34 x 1022…

A:

Q: How many oxygen atoms are there in a single formula unit of Al2(SO4)3?

A: 1 molecule of given molecule is made up of 2 Al3+ and 3 SO42- units.

Q: What percentage of atoms in the molecule represented in the following formula are nonmetals?…

A: % of non-metal atoms = 100 x number of non-metal atoms/total number of atoms

Q: A 2.41 g sample of nitrous oxide (an anesthetic sometimes called laughing gas) contains 3.30 x 102…

A: Given: Number of molecules of N2O =3.30×1022 molecules And mass of N2O sample =2.41 g

Q: 2. Write the correct chemical formula: a. Magnesium fluoride b. Stannic nitrate c. Magnesium…

A: Following are the chemical formula of given compounds:

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: A 2.62 g sample of nitrous oxide (an anesthetic sometimes called laughing gas) contains 3.59 x 1022…

A: Given  (a)   Mass = 2.62 gram       Number of molecule of N2O  =  3.59 × 1022 molecule       Number…

Q: A nanotechnology experiment requires 3.60x 1019 atoms of potassium. What is the mass of this sample?…

A: Given  number of atoms of potassium = 3.60 x 1019 atoms To find mass of this sample. Required data -…

Q: A sample of ammonia has a mass of 96.3 g. How many molecules are in this sample? A. 5.65 molecules…

A: One mole of any substance consists of 6.022×1023 molecules. The number of moles of a substance can…

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: Determine the number of atoms in a piece of silicon that has a mass of 15.0 grams. O 1.13 x 1024…

A: *** { note :- as per guidelines only one question will be answered. Please repost remaining…

Q: Classify each of the substances as an atomic element, molecular element, molecular compound, or…

A: Atomic element: An elements exists independently (single element) is known as atomic element.…

Q: Complete the table, and then analyze the data to determine if Compounds Iand II are the same…

A: The concentration of a substance can be measured in terms of mass by mass percentage. This…

Q: A drop of water has a volume of approximately 0.05 mL. How many water molecules does it contain? The…

A: Density of a substance is equal to the mass of the substance divided by its volume. Write the…

Q: calculate the number of atoms in 1.72 grams of barium

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Q: The atomic mass of titanium (Z = 22) is 47.87 amu. How many atoms are present in 45.5 g of titanium?…

A: Mole of a substance or a mole of a particles is defined as exactly 6×10^23 particles which may be…

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: Write the formula for each of the following compounds and indicate which ones are best described as…

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

Q: 15. A sample of 1 mole of which of the following contains the greatest number of oxygen atoms? e.…

A: Oxygen atoms:

Q: Complete the table: Element Mass Moles Number of Atoms Na 37.0 mg _____ _____ C _____…

A: 1. Calculation for moles of Na: moles =massmolar massmoles of Na=37.0×10-3 g23.0 g/molmoles of…

Q: A sample of TNT, C7H5N3O6 , has 7.97 x 1021 nitrogen atoms. How many hydrogen atoms are there in…

A: The details solution for this is provided below in attach image.

Q: 2. What is the sum of the atomic numbers of each element present in the reactants of the given…

A: The atomic number of each element tells us about the number of proton in its nucleus:

Q: toms are there in 400.5 grams of Silicon? A V-M. G a. b. 6.77 X 1027 atoms 8.58 X 1024 atoms С.…

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Q: The Cullinan diamond was the largest natural diamond ever found (January 25, 1905). It weighed 3104…

A: 6.023× 10^23 is called Avogadro's number. 1 mole of any substance contains Avogadro's number of…

Q: Identify the elements that have molecules as their basic units.a. hydrogen b. iodine c. lead d.…

A: Molecular elements consist of molecules as their basic units.

Q: The molecular mass of a compound containing 75.0 % carbon, 10.5 % hydrogen, and 14.6 % nitrogen is…

A: given 75.0 %  C 10.5 %H  14.6 %N molecular mass 384.6.

Q: A 3.69 g sample of nitrous oxide (an anesthetic sometimes called laughing gas) contains 5.05 x 1022…

A: a.The total number of nitrogen atoms in 3.69g sample of nitrous oxide is calculated as,

Q: Rank the following according to DECREASING number of S atoms: A. 31.0 g S8 B. 50.0 mL CS2 (density…

A: To rank them, first calculate number of S atoms in each case.

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.