1. The density of air is given as 0.00118 g/mL, and the total volume of air is found to be 105.89 mL. What is the mass of this air in grams?

Q: Assuming water has a density of 1.00g/mL. Question Content Area 150. g of 3.05% (w/w) NaCl solution…

A: Mass of NaCl solution = 150 g  Mass percentage of NaCl solution = 3.05 % (w/w)

Q: What is the mass number of an isotope

A: Mass number is equal to sum of mass of atomic number and number of neutron

Q: 4. Which of the following statements are trme of chemical reactions? a. The number and types of…

A: Which of the following statements are true of chemical reactions?

Q: Colligative properties such as freezing point depression were used to find the molar mass of an…

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Q: E. Which member in each of the following pairs will be more soluble in water?Explain. a.…

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Q: What is the pH of a buffer solution that contains 20.0mL of 0.10M H2CO3 and 50.0mL of 0.10M NaHCO3?

A: We would use Henderson Hasselbalch equation to calculate the pH of buffer solution.

Q: If 0.100 grams of unknown solid are dissolved in water and titrated with 4.68 mL of the NaOH, what…

A: Molar mass is grams / moles. We have grams from the weighed mass, we can calculate moles of acid…

Q: What is the molarity of a solution that contains 2.0 moles and Nacl in 500 ml

A: • The values provided in the question are:-       i) Number of moles of NaCl (solute), n = 2.0 mol…

Q: Answer the following conditions given they represent a titration of 25.00 ml of 0.150 M CH,CO,H with…

A: Here we have to construct the ICE table and use the Henderson hasselbalch equation. However if base…

Q: structure of (R)-3-fluoro-3-methylhexanal

A: Given,  What is the structure of the compound = (R)-3-fluoro-3-methylhexanal

Q: Calculate the force of attraction between a cation with a valence of +3 and an anion with a valence…

A: Given: charge on cation = +3 charge on anion = -2 distance between them = 2.2 nm = 2.2 x 10-9m To…

Q: What is the equilibrium constant for a reaction at 25 °C. The value of AG° is -68.5 kJ/mol. O more…

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Q: What is the molality of a solution made by dissolving 23.9 grams of LiI in 260 grams of water?…

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Q: Q4. Differentiate between the following with examples. a) Diffusion and effusion. b) Exothermic…

A: Diffusion Effusion Effusion is said to occur when gas molecules escape through a pinhole into…

Q: This equation models how pure silver (Ag) is extracted from ores of AgK(CN), (potassium…

A: Given: mass of silver coin = 23.6 g To find: How many atoms of pure zinc (Zn) are needed in the…

Q: The reaction of sucrose with water in an acidic solution is C12H22011 + H20 C6H1206 + C,H1206…

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Q: Write the net-ionic, acid-base reactions that would occur in order to dissolve the precipitate…

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Q: What mass of hydrogen peroxide must decompose to produce 65.88 g of H,O? H2O2→02+H,O

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Q: How many grams of water are produced from 52.0 grams of propane (C3H3) using the following equation:…

A: Given :  C3H8 + 5O2 → 3CO2 + 4H2O  Mass of C3H8 = 52.0 g  To calculate :-  Mass of water (in grams)…

Q: I have 123.8 grams of KBr, ana combine it, in a beaker, with water at a temperature of 60.0 degrees…

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Q: Name this compound in the space provided. [Co(en)2(H2O)(CI)]3[Ni(CN)4]2

A: The following nomenclature must be followed :  1. Name the first coordination sphere, then second.…

Q: Consider an electrochemical cell with a zinc electrode immersed in 1.0 M Zn 2+ and a silver…

A: Given data:  Zn2+ + 2e-  ------> Zn E°cell= -0.76V  Ag+  + e- -------> Ag    E°cell = 0.8V…

Q: iv) At STP, one mole of an ideal gas occupies... a) 10.22 L b) 20.24 L c) 30.22 L d) none of these

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Q: Draw structures for (i) N-ethyl-N-methyl-4-methylpentanamide and (ii) t-butylamine

A: Amines are derivatives of ammonia (NH3) Based on number of H-atoms replaced in ammonia , amines are…

Q: How many gallons of octane, CgH18, having a density of 0.703 g/cm, would have to be burned to…

A: Given: density of octane = 0.703 g/cm³ energy produced by 3.15 g of He by the fusion reaction: 12H…

Q: The correct name for the molecule CH3CH2CH2CH2CH2CH2CH3 is ----

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Q: XS HI + H,0 IV II III O II O IV

A: In this question we have to tell the starting material of the given reaction and also its mechanism.…

Q: Draw phosphatidylserine in which R; and R2 are both 6-carbon saturated fatty acids. 02 Draw a fatty…

A: Phosphatidyl serine is a component in cell membrane it is a phospholipid.

Q: Draw the products that form when the ester is treated with H,0 and NaOH. Differentiate products by…

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Q: why liquids like mineral oil or acetone are not good at dissolving salts, or why mineral oil and…

A: This is because of the fact  that mineral oil are aprotic in nature

Q: Question 46 Which of the following statements about titration curves is false? O The equivalence…

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Q: An organic chemist reacted 10g CH4 with an excess of Cl2 and obtained 10g CH3CI. a. What should have…

A: Solution -

Q: The half-life of radioactive chromium-51 is 28 days. If a sample of chromium-51 has a mass of 12.0…

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Q: OCH,CH, H* CH,CH-OCH, +H,O 5. C-CH, H + 2CH, - OH 6. CH,CH,-C-CH,CH, + H, .

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Q: Calculate freezing temperature Tf and the boiling temperature Tb for a solution formed by mixing…

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Q: A soil was measured for cation exchange by leaching 15 g of soil with 80 mL of solution of 1 M…

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Q: Balance the following redox reaction. Ni. ", I0, →N. *. I Question 9 Ni 10," CH+or H20)) ICH+ Ni 3+…

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Q: The equilibrium constant for the gas phase reaction 2S03 (g) 2SO2 (g) + O2 (g) = 3.6 x 103 at 999 K.…

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Q: You add the same amount of acid to 2 solutions. One contains a buffer, the other does not. Which…

A: A buffer’s pH changes very little when a small amount of strong acid or base is added to it. It is…

Q: CaH₂(s) + 2H₂O(l)→ Ca(OH)2(aq) + 2H₂(g) A laboratory researcher experimented 225 mL of wet H2 with…

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Q: What is the pH of a 0.85 M HClO4 (perchloric acid, a strong acid) solution?

A: given data:  HClO4 is a strong acid. Concentration of HClO4 is 0.85M

Q: What [NH3] needs to be added to 0.0010M NH4Cl to obtain a buffer solution with pH of a 7.3?

A: pH of buffer solution is calculated by using Henderson Hassel balch equation

Q: What is the pH of 10mL aliquot of toluic acid (with a concentration of .1837M) after 21.05 mL of…

A: Given that, 10 mL aliquot of toluic acid with concentration 0.1837M.after addition of21.05 mL of…

Q: H2S + H20 H3O+HS- Which specie is bronsted acid?

A: • The given reaction is,            H2S + H2O → H3O+ + HS-    • We need to determine the bronsted…

Q: Isooctane, CgH18), is one of the main constituents of gasoline. Calculate the mass of carbon dioxide…

A: Given,  How much amount of carbon dioxide gas produced by the complete combustion of 692 g of…

Q: Balance this unbalanced equation by entering only whole num it blank) CaHg + O2→

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Q: What is the molecular formula of the structure?

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Q: Which of the following will be diamagnetic? O Ni²+ O Co3+ OMN²+ Sc3+

A: Given :-   Ni2+  Co3+  Mn2+  Sc3+  To identify :- diamagnetic ion

Q: What is the E value for the Galvanic cell formed from these two half-reactions? PbO2(s) + 3 H*(aq) +…

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Q: . An ideal gas with Cv = 1.62 kJ/kg-K and R = 273J/kg-K expands from 0.15m3 cubic meter) and 27 deg.…

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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.