What is the importance of making molecular models

Q: Calculate the mass % of 2.50 g Na3PO4 + 10.0 g H2O

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Q: 48. How many molecules of caffeine, C4HSN2O, are there in 18 g of caffeine? a. 1.12 ×10E23 b. 1.05…

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Q: Using the periodic table for this course (Chem 100 Periodic Table.pdf ), which substance contains…

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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: What percent of Potassium Sulfate Hexahydrate is the Potassium? o 11.34% o 56.73% 4.25% 27.65%

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Q: 1 Pb(NO3)2 + Na,SO4 → 1 PBSO, + NaNO3 - REACTANTS PRODUCTS Element / Polyatomic lon How Many?…

A: Balanced reaction is:  1 Pb(NO3)2 + 1 Na2SO4                            ----------> 1 PbSO4 + 2…

Q: The cullinan diamond was the largest natural diamond ever found (january 25 , 1905 25, 1905). It…

A: Use formulas Mole=mass÷molar mass Total atoms=mole×6×1023 MOLAR mass of diamond= 12g/mol

Q: 1. 2 eg LICH,CH, 2 HCI, H,0 1. CH,MgBr 2. HCI, H,0 KCN, HCN HN-OH cat. HCI

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Q: Which sample contains the greatest number of atoms? 54.7 g V 51.2 g Mn 203 g Bi

A: To find number of atom we have to calculate number of moles first. Moles= given mass/molar mass…

Q: You are working in the laboratory preparing sodium chloride. Consider the following results for…

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Q: What amount, in moles, does this mass represent?

A: Number of moles = mass/molar mass  Molar mass of methanol is 32.04 g/mol

Q: Draw the structures of compounds A–H in the following synthesis scheme.

A: A chemical reaction is symbolic representation of the conversion of substances to new substances. In…

Q: Heavy water is produced by using the rare isotope deuterium, Nwhich hydrogen-2 (H) replaces the…

A: Given,

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: D* (aq) + CO,-(aq)→ (s) +3H;O(1) HCI (g) + NH3 (g) → NH,CI (s) 2H2S(g) +302(g) → 2H,0(g) + 2SO2(g)…

A: Equation first :1 )  number of molecules of products is  more than that of reactant so entropy is…

Q: Calculate the grams of nitrogen in 23.4 g of Ca(NO3)2.  2. Calculate the mass percent of chlorine…

A: The given data : 1.The mass of the Ca(NO3)2 = 23.4 g To determine = The mass of nitrogen 2.…

Q: White sand is made of silica (silicon dioxide, or SiO2), which has a density of 2.20 g/cm³. How many…

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Q: `CI "OH NO2 ÑO2 C OH R. MgBr .R' R. 1. R' `R' 'R' ОН 1. OsO4 2. H2О2, Н2О ОН ОН E A HCI H2O ОН

A: The given reaction is represented as follows:

Q: What is the mass of 4.50 x 1022 cu atoms? Multiple Choice O 747 x 102 amu O 747 x 1029 4.75 g

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Q: Which sample contains the greatest number of atoms? (a) 15 g Ne (b) 15 g Ar (c) 15 g Kr (d) None of…

A: The mole concept is used to solve such problems. The mole concept was introduced by Avogadro to…

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: (а) (1) NaN3 (2) LİAIH. (3) Н,о* Br (b) excess CH31 (1) (2) Ag20 (3) heat Br (1) HCI, NaNO2 (2) CuBr

A: The question is based on the concept of organic reactions.   we have to identify the Product formed…

Q: Q/ 0.1 g a NaCL , qul Moarity2 L. Na = 23 . CI = 35.45 *

A: Kindly post question in english language from next time. I can't understand your language but…

Q: CIO,- :0: ö=c=ö :0: :ö: 3=c=ö :ö: :0: :0: :ö: 1 :0: :0: :O:

A: The anion given is a hyper chloric ion, when a proton is removed from the hyper chloric acid we get…

Q: Q11 (B) Calculate the mass of 941 molecules of Al2(SO4)3.

A: Molecular Mass : The molecular mass of any compound is defined as the mass of one mole of that…

Q: For each reaction, predict the sign and find the value of ΔS°:

A: Given:-                     a    3NO2g +H2Ol  →2HNO3l +NOgb   N2g +3F2(g)   →2NF3gc   C6H12O6s +6O2g…

Q: Need help

A: The mass of water in oxalic alumina is determined as,

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: Calculate the mass percent of C in CH4 (you can use 1 mole of methane as the basis for your…

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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: Find the mass of 1 molecule of NaH in gram. а. 23.99 b. 3.98 x1023 С. 12 d. 3.98 x10-23

A: Atomic mass of sodium (Na) and hydrogen (H) atoms are as follows; Atomic mass of Na = 22.99 g/mol…

Q: ) deh), Mg Br 2) $ CCH2)3 Mg Br + H2CO H20 3) $C CHa)g Mg Br +

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

Q: Calculate the mass of 816 molecules of Cu(NO3)2.

A: We know , 1 mole of substance = 6.022 × 10²³ Molecules By using this relation , we can calculate the…

Q: °C. Mass of Mg = g %3D

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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: In the reaction 1. the Law of Gravity. CACO3 CaO+ CO2 2. the Law of Conservation of Energy. 100…

A: Here, it is given that the mass of calcium carbonate is 100 grams and the products formed will have…

Q: Write the expression for the equilibrium constant for each equation.

A: The equilibrium constant is the ratio of the product of the concentration of products to the…

Q: Part B Magnesium makes up 2.10 % by mass of the Earth's crust. How many grams of magnesium are…

A: Mass percent :-  The mass of a component in grams present in 100 grams mixture of all components is…

Q: 1. ssm Hemoglobin has a molecular mass of 64 500 u. Find the mass (in kg) of one molecule of…

A: Hemoglobin is present in red blood cells whose function is to carry oxygen from lungs to body…

Q: 2. What mass of methane (CH4(9) O2(9) → CO2(9) + H20(9) AH°rxn = -890 %3D

A: The given reaction is, CH4(g) + O2(g) ---> CO2(g) + H2O(g)  .......∆H = -890 kJ   From this, we…

Q: examples

A: Carbon based nanomaterials such as fullerene, carbon fibers, carbon nanotubes, nanodiamonds are…

Q: How many molecules is 9.88 x 10^13 grams of ZnCI2, zinc chloride

A: Avogadro number: It can be defined as by saying that the number of units in one mole of any…

Q: A 1.98 g sample of nitrous oxide (an anesthetic sometimes called laughing gas) contains 2.71 x 1022…

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Q: cat. H2SO, а) H20 (1) ВНз b) (2) Н2О2, NaOн (1) Hg(OAc)2, H2O/THF c) (2) NaBH4, NaОН

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Q: c mass of hy 67X (66.9256 abundances c

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Q: 14 14 7.6C7N+ O 0 1.H O 0 le 0 -le 14 IN O

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Q: 4. C 5. Baking Soda M 10. for inorganic compounds. 1. Peanut Oil 6. Carbon Dioxide - 2. Salt 7.…

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Q: A sample of methane, CH4, has a mass of 38.75g. Calculate the number of methane molecules in the…

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

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.