MCQ 104: When calcium oxide is burned with clay its makes A. cement B. steel C. calcium carbonate D. bricks

Q: List major sources (biogenic and anthropogenic) of ammonia in the air. What happen to ammonia when…

A: Nitrogen is the largest component of air gases and so is its compound ammonia. Ammonia pollution is…

Q: *11.2.6. Moist air has a humidity of 0.020 kg of H,0/kg of air. The humid volume is 0.90 m³/kg of…

A: Humidity is given by total mass of water /volume of air = 0.020/0.90 = 0.022. From table of humidity…

Q: Please answer the ff questions and clear your answer. a. Why are most atoms held by chemical bonds.…

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Q: Water samples found in the laboratory and in the environment may differ significantly in a number of…

A: Lowest Conductivity Deionized Water Fresh water Brackish water Sea water Highest Conductivity

Q: An unknown substance is found to contain only carbon and hydrogen. It is a liquid that boils at 49…

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Q: Part C At 25 °C and 1.0 atm pressure, what is the minimum quantity of dry air needed to combust 1.2…

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Q: what will an electrical conductivity do when the size of a sample increases

A: Electrical conductivity is an intensive property and does not depend on the size of the…

Q: Consider this list of substances: H2O, Ni, KI, CH4. Match these substances with the properties…

A: Ionic compounds and metals are good conductors of electricity as the electrons in them are free to…

Q: How many grams of Pb(NO3)2 (331.2 gimol )are needed to prepare 200 ppm (w/v) of Pb*2 (207.2 g/mol)…

A: The concentration of Pb2+ ions is = 200 ppm The volume of the solution is =? The molar mass of lead…

Q: porymur 13 IUIT alone under thế force of gravity. QUESTIONS 1. What is the effect of absorbed…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: Solution:              conductivity(MS) H2O distelled      95 H2O tap               1236 NH3…

A: The given molecules are, H2O distilled, H2O tap water, NH3

Q: 4) You tested a solution Ca(C 3 H 3 O 2 )) for electrical conductivity What might explain the…

A: The question is based on the concept of electrical conductivity. we have to give reason for the…

Q: Sodium carbonate (Na2CO3Na2CO3) is used to neutralize the sulfuric acid spill. How many kilograms of…

A: Since here the reaction taking place will be, Na2CO3 + H2SO4 ----> Na2SO4 + H2O + CO2 Hence we…

Q: 3. Water has the properties of Adhesion and Cohesion. A. How many hydrogen bonds can a single water…

A: Answer c :  Alcohol molecules spills over the surface…

Q: When you test a sample of tap water, the lightbulb of the conductivity apparatus glows bright why?

A: When we test a sample of tap water, the light bulb of the conductivity apparatus glows bright. Hence…

Q: A 10.60 g organic acid (1.45% dissociated) is dissolved in 2.5 kg water and freezes at -0.043°C. 27.…

A: We know that ∆Tf = Kf×m×i  And  ∆Tb= Kb×m×i

Q: Why did the compounds acted differently when conductivity was tested?

A: Conductivity is basically the ability of movement of electricity or heat throughout the chemical…

Q: Which of the ff. angles is used for turbidity measurement of a colored solution? 180 degrees O 135…

A: Please find your solution below : 90 degrees angle is used for turbidity measurement of a coloured…

Q: How does PEG / PPG Dimethicone (below) differ from a regular linear Dimethicone. What…

A: PEG/PPG dimethicone differ from a regular linear Dimethicone in the sense that these polymers have a…

Q: e water at 42°C.

A: In neutral solutions concentration of hydroxide ion is same as concentration of hydronium ion

Q: Methane burns and give off 192 Kcal/Mol, assuming 90% effeciency in heat transfer. what mass in KG…

A: Answer: In the process of heating up ice, there will be three steps,  1. Heating of ice up to its…

Q: In the movie Spy Kids, Carmen and Juni use rebreathers instead of a scuba tank and/or snorkel tube…

A: Rebreather is an apparatus which can be used as substitute to oxygen cylinder in scuba diving.…

Q: Which will yield high intensity of light?   a. concentrated acetic acid b. 25% acetic acid c.…

A: Concentration is related to the intensity leaving out of the sample. In the given question different…

Q: 34. ................annot be heating and reshaped is. OA. Thermoset. OB. Thermoplastic. 35. The…

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Q: 23 Vijay does the following experiment. upside-down cup 1 Take an empty cup. 3 Push the cup with the…

A: Air is composed of gases and occupies volume. When water is added to a container containing only…

Q: Write about high density polyethylene and low density polyethylene and their advantage and…

A: The answer to the folowing question is-

Q: ed to Question 9 1) Hg(OAc), H,O 2) NABH,/OH

A: The reaction mentioned in the question  is a example of synthesis of alcohols from unsaturated…

Q: Calculate the 143Nd/144Nd ratio of a basalt after it has interacted with seawater, given the…

A: The solution of the given question is

Q: 9. The density of Al is 2.7 g/cm³ and that of Al2O; is about 4 g/cm³. Describe the characteristics…

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Q: 40 Boyle's, law 35 30 25 15 02 0-4 Dete 8 What is the sShape of the deta 2inear Yes.

A: In this question we will define Boyle's law and plot the respective graph. We will tell the shape of…

Q: 21. Explain why a woman might put dents in a wood floor when walking across it in high-heeled shoes,…

A: Please find your solution below : The pressure is defined as force per unit area. This means that…

Q: В. .C. HO HO, Na С. NH2 'N H. O=O

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Q: A student heated a 2.43-g sample of a hydrate and recovered 1.35g of an anhydrous compound. (c)…

A: Number of moles = Mass/molar mass Mass of water = Mass of hydrated compound - mass of anhydrous…

Q: DNA is a mag

A: DNA consists of two strands that coils around each other. Each strand has repeating units of…

Q: oxygen saturation How different elements are contained in a molecule of tetrodotoxin? What are the…

A: In the given question we have to identify the different types of element present in a molecule of…

Q: Calculate the approximate length of PVA strand assuming that each monomer unit contributes two…

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Q: 3. Water has the properties of Adhesion and Cohesion. A. How many hydrogen bonds can a single water…

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Q: Heating and cooling of iodine, I2. (i) What happened when the iodine was heated in the test-tube?…

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Q: Using Table 15.2, the amount of water required to saturate 1 kilogram of air at -5°C is about O…

A: The answer is given below

Q: MCQ 69: In order to increase the Van der Waal's forces, A. contact points shall be minimized B.…

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