The boiling point of hydrogen is -253 oC. What is this temperature in Kelvin? -20 K 285 K 20 K 526 K

Q: How many grams of ice at 0.0°C must be added to 225 grams of tea at 35.0°C to cool it down to 5.0°C?…

A: Given - Temperature of ice = 0.0°C             Mass of tea = 225 g             Initial temperature…

Q: What is the molarity of 250.0 mL of a solution that contains 27.9 g of C3H7OH?

A:

Q: Use the References to access important values if needed for this question. Does a reaction occur…

A: Here, we have to find whether a reaction will occur or not when aqueous solutions of chromium(III)…

Q: Question 4 Initially, a closed vessel at 150 °C has a partial pressure of IBr of 0.350 atm and…

A:

Q: Draw five good resonance structures of the following compound:

A: The molecule consists of several heteroatoms like oxygen and nitrogen and four double bonds. Hence…

Q: Perform Dixon's Q-test for the following data points. Make a conclusion to reject or retain the…

A: Here the questionable value is the highest value, which is 1.9765 (Sample No-6) because it has the…

Q: Classify the statements based on whether they describe the method of standard addition, the method…

A: Because the standard specimen and the sample are combined before the equipment reaction is measured,…

Q: Explain the types of heterogeneous catalysis mechanisms presented by the polyoxometalates?

A: Heterogeneous catalyst: Heterogeneous catalysis refers to a catalytic process when the reactants and…

Q: Which pką value best represents this molecule? NaCl 30 10 40 none of these

A:

Q: Rank the structures from most acidic (1) to least acidic (3). A B U N H A H H-CI B [Choose ] [Choose…

A: The strength of the acid can be determined by the stability of the conjugate base after the donation…

Q: The two compounds shown below are: Br Br. H and "A" A H H H Br Br diastereomers. meso forms.…

A:

Q: What is the major product of the following reaction? Select one: Br J ملل de EtON a EtOH Δ ?

A:

Q: [Select] Wave [Select] has the shortest wavelength. This means that in relation to the other waves,…

A:

Q: Question 2 You are trying to maximize yield in the following reaction. Give three ways that you can…

A: We are given a reaction at equilibrium and we need to discuss what changes to be done on equilibrium…

Q: penny has a density of 8.82 g/mL and weighs 17.00 g, how many pennies would fit in a 50.0 mL beaker?…

A: q

Q: Given a pOH of 6.90 what is the concentration of the hydronium ion (H3O*) in solution? Your Answer:…

A:

Q: Rank the following in increasing (smallest → greatest) order of electronegativity: Magnesium (Mg),…

A: ANS. As we move left to right in periodic table electronegativity increases because nuclear charge…

Q: What is the most probable identity of the element X wb symbol is shown below? O a. tellurium O b.…

A: By seeing the element symbol with valance shell electrons we can predict the element name.

Q: Pls answer number (3.) only 1. Identify/name the specific molecule/monomer to the left 2. Name the…

A: We have given an organic molecule and we have to react two molecules of given  organic molecules…

Q: Use a Grignard reaction to prepare the following alcohols: (a) 2-Methyl-2-propanol (b)…

A: Grignard Reaction is the addition of an organomagnesium halide to a ketone or aldehyde resulting in…

Q: Combustion of a hydrocarbon in a limited supply of air produces CO in addition to CO2 and H2O. When…

A: Given data :

Q: Figure 5 CH₂ CH3-CH₂-C-CECH CH3 Ⓒ NH₂

A: In this reaction alkyne has acidic proton and NH2 - act as a proton acceptor.

Q: is 2‑bromoethan‑1‑ol and its mirror image chiral and do they contain a plane of symmetry, why?

A: Stereochemistry is a branch of chemistry in which we deal with three dimensional arrangement of…

Q: Carbon and oxygen combine to form carbon dioxide. A chemical equation you might write for this…

A: Substance that are present to the left of the arrow in a chemical equation are reactants and…

Q: My daughter loves lemonade. She adds 500 grams of sugar (sucrose C12H22O11) to a 1.5 liter pitcher.…

A:

Q: Give the formula for cobalt(II) chlorate dihydrate: O COCIO3(H₂O)2 O Co(CIO3)2(H₂O)2 CoCl₂.2H₂O…

A:

Q: What mass of MgCl2 is required to prepare 500.0 mL of 0.100 M solution?

A:

Q: II. Give the IUPAC name given the structure of the following organic compounds.

A: IUPAC nomenclature: In IUPAC nomenclature  a molecule's longest chain of carbons is taken as parent…

Q: What’s Acetone? What the abstract of Acetone?

A:

Q: What would be the major product of the following reaction? H Select one: O O O O ...H ***H H H...…

A:

Q: A. Predict the pressure of nitrogen gas at T =-98 K and v=0.00375 m³/kg on the basis of (a) the van…

A:

Q: What is the mole fraction of solute when 1.85 mols of ethanol is added to 8.5 mols of water?

A:

Q: A Write the X notation for each atomic depiction: Z (a) 6e¯ 6p+ 7nº 00 (select)

A:

Q: 6. Calculate the uncertainty in the speed of a ball of mass 500 g that is known to be within 1.0 um…

A:

Q: B. Calculate the pressure of vapor at a temperature of 400°C and a density of 20 kg/m^3 using (a)…

A: Given :  Temperature = 400oC = 400+ 273 =673k  Density = 20kg/m3  Gas constant = 0.5 KJ kg K

Q: Rank from highest to lowest boiling point. To rank items as equivalent, overlap them. View Available…

A: Higher the number of carbon atoms in an organic compound , higher will be its boiling point. This is…

Q: What is the pka of the indicated hydrogen? ↓ H

A:

Q: The preparation of aspirin is achieved through acetylation of salicylic acid. Provide the full…

A: Aspirin is synthesized from salicylic acid and acetic anhydride in the presence of phosphoric acid.…

Q: A. Predict the pressure of nitrogen gas at T =-98 K and v=0.00375 m³/kg on the basis of (a) the van…

A:

Q: Choose the most stable carbocation in the figure shown below. I. II. III. CH3 CH3 CH3 IV. CH3 ✪ CH₂

A:

Q: 2. Check the structural formula and then give the IUPAC name of the following structures: a. C. b.…

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

Q: The concentration of CO2 above a body of water (at 25 °C) was determined to be 10,000 mg/m3. What is…

A: Given the atmospheric CO2(g) concentration = 10,000 mg/m3  Temperature of air, T = 25 +273.15 =…

Q: Noncovalent bonds are too weak to influence the native structure of proteins. Select one: a.

A: Proteins are made up of number of small units called amino acids. These amino acids are attached to…

Q: A definition of the word base is something that is of low quality and is easily corruptible.…

A: Please find your solution below : Base metals are the metals that are inexpensive, invaluable to…

Q: Cryolite, Na3AlF6(s), an ore used in the production of aluminum, can be synthesized using aluminum…

A: Since you have asked multiparts, we will solve the first three subparts for you. If you want any…

Q: For the following initial and final states shown below in the diagram, a transition occurs involving…

A: When an electron jumps from lower shell to higher shell, then it absorbs energy in the form light.…

Q: Given 1.00 M acetic acid, what is the pH? (Hint Ka=1.8 x 10-5 and do an ICE table) 7 11.62 1 0 2.37

A:

Q: A copper sulfate solution is electrolysed for 30 minutes using platinum electrodes. 0.010mol copper…

A: Electrolysis is defined as a process by which a compound gets dissociated by passage of electricity.…

Q: In lab, your spectrophotometer has a maximum detection limit of 1.1 M. The solution you want to…

A: Given: The original concentration of the solution = 3 M The volume of the original solution taken =…

Q: actions to indicate r all of the bond-fo eaking steps.

A: Organic reactions are those in which organic reference react to form Organic products. In organic…

Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.