If pulsars are born from the core-collapse of massive stars, why do pulsars rotate so much faster than massive star cores? Because of conservation of mass during the collapse In fact they do not rotate faster Because the supernova explosion makes the neutron star rotate fast Because of conservation of angular momentum during the collapse Because of the intense magnetic fields on the neutron star

Q: Possible carboxylic acids Name 2-chlorobenzoic acid (pka = 2.92)¹ 4-methylbenzoic acid (p-toluic…

A: As per Bartleby guidelines, i am allowed to answer one question at a time.  Sorry for inconvenience.…

Q: А. this question. Sketch one 'face' of a unit cell for SC, FCC and BCC. A total of 3 sketches are…

A: The SC unit cell is shown below. The FCC unit cell is shown below. The BCC unit cell is shown…

Q: 11. What is the most likely electron configuration for a sodium ion in its ground state? a. 1S2 2S²…

A: electron configuration is the distribution of electrons of an atom or molecule.

Q: 3. How many moles are there in 2.22 x 10ª g of (NH4)2SO4?

A:

Q: ts) The heat of fusion of water is 6.01 kJ/mol. The heat capacity of liquid water is 75.3 J/mol · K.…

A:

Q: 1) Molten metal chloride (MC13) subjected to a current of 6.50 A for 0.388 hours deposits 1.41g of…

A: It is given that current = and time for which it flows Charge,

Q: 1. For the following reaction 5 CO(g) + 1205(s) → 12(g) + 5 CO2(g) AHO=-1175 kJ for each change…

A: "Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Vulcanization imparts stretchiness and stability to polymers and uses sulfur. SHOW ALL WORK: I. Give…

A: Lewis dot structures are diagrams that show the bonding between atoms of a molecule as well as the…

Q: A saturated solution of a nonvolatile electrolyte AB exhibits an osmotic pressure of 74.4 torr at 25…

A: The osmotic pressure is given by  Osmotic pressure in atm = i X CRT where i = Van't Hoff factor =…

Q: The dissolution reactions of gold (Au) in 1M HNO3 and 1M aqua regia (1M HNO3 + 1M HCI) are given…

A: When the direction of reaction gets reversed then the emf value also changes its sign.

Q: Question 1 | 1 Consider the equilibrium at 392° C: 2A +B2 C. The partial pressures are found to be:…

A: P(A)=6.70atm P(B)=10.1atm P(C)=3.60atm Kp=?

Q: MISSED THIS? Read Section 17.9 (Pages 765-769). Consider a 0.14 M solution of a weak polyprotic acid…

A: Given,  Molarity of H2A = 0.14 M Ka1 = 1.0 x 10–4 Ka2 = 1.0 x 10–6

Q: 10. Balance the following equations: Ca(NO3)2(aq) + Na,SO4(a9) → CASO466) _NaNO3 а. b. Ni (s) + CaO…

A: Interpretation - To balance given reactions

Q: Part A Find A,S° for the reaction between nitrogen gas and hydrogen gas to form ammonia. Standard…

A: Entropy is measure of randomness in the system. This term come under branch of thermodynamics.

Q: 152 = A 352.44 155 T 362.31 Your Answer: -276.8 kJ 2 Answer 153 units G 355.67 156 X 365.88 154 D…

A: Given, The reaction: AG2+ 2 XD  →  AD2 + 2 GX      ∆Hrxn =-276.8 KJ mass of GX = 29.10 g.

Q: Part C 13.0 moles of gas are in a 8.00 L tank at 23.6°C. Calculate the difference in pressure…

A: Real gasses have attraction so they have less pressure than ideal gasses

Q: 4. Rhodium has a density of 12.41 g/cm³ and crystallizes with the face-centered cubic unit cell.…

A: Rhodium has a density of 12.41 g/cm3 and crystallizes with the face-centered cubic unit cell.…

Q: g. If the pH of stomach acid is 2.0, calculate the H* ion concentration.

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

Q: Which of the following reactions is/are endothermic? Choose ALL that apply. a. C(s) + O2(g) → CO2(g)…

A: Identify the reaction is exothermic or endothermic ----

Q: 1. The temperature of a 98.7 g piece of metal increases from 17.0 °C to 31.0 °C when the metal…

A: Note: Since you have posted a question with multiple independent parts, we will solve first part for…

Q: ▾ Part A Balance this equation, and then enter the coefficients, in order, below. CH4 (g) + Br₂(g) =…

A:

Q: Provide products for the following reactions: 1) 3 NaNH, Br 2) CH,Br Br 1) NaNH, 2) `Br Br H;C-C=c¯…

A:

Q: What is the correct Ksp expression for the sparingly soluble salt lead(11) chloride? Ksp = [Pb4+]…

A:

Q: 2. Rank the molecules below from most reactive in Diels-Alder reaction to least reactive. Explain…

A: Diels-alder reaction involves cycloaddition of diene with dienophile to give six member cyclic…

Q: A popcorn tree that is 3.70 m tall grows at a rate of 2.743 x 10 mm/s. How many meters tall would…

A: Given that, the height of the popcorn tree is 3.70 m.The growth rate of the tree is 2.743×10-5…

Q: The following table contains some standard enthalpies of fomation, AH. at 298 K Constants P Part A…

A: Given: Standard enthalpy of formation of C3H8(g) = -103.85 kJ/mol Standard enthalpy of formation of…

Q: The concentration of Species D was measured as a function of time during a chemical reaction. Its…

A:

Q: 4. The reaction between solid sodium and iron (III) oxide is one of a series of reactions that…

A: *  Given data=>     Weight of each reactant is 25 g * Molar masses=>       molar mass of Na =…

Q: 5. Bobby and Jane dissolve 13.4 g of solid potassium iodide in water, then pour the solution into an…

A: In every chemical reaction, reactants react to give the products. The reaction can be expressed as a…

Q: Write the complete electron configuration of copper. Write the noble gas configuration of the copper…

A: 1]Electronic Configuration:The electronic configuration of an atom or ion is a representation of how…

Q: An unknown element X has the following isotopes: 52X (90.00% abundant), ®X (8.00% abundant), 5°X…

A: Average atomic mass :-         Many naturally occurring elements exist in more than one isomer. It…

Q: Question 1 100.0 g of propyne (C3H4) (g) is burnt in a 30.0 L rigid vessel containing pure O2 (g) at…

A:

Q: Determine the mass, in grams, of 0.790 moles of Mn (1 mol of Mn has a mass of 54.94 g).

A: The answer to the following question is given as -

Q: 1) How many moles of carbon dioxide are produced when 2.25 moles of ethane (C2H6) combust?

A: Combustion :-  The burning of a compound in excess of air or oxygen is called combustion .…

Q: Pls help ASAP on both.

A: Question 1 based on addition reaction of br2 Question 2 based find out type of arrow pushing

Q: 2. Electron configurations a. Write the electron configuration and orbital diagram for Co. Identify…

A:

Q: 3. Which element is oxidized in the chemical reaction shown by the following chemical equation? 3 Cu…

A: If an element's oxidation number increases from left to right side,  means it loses electrons and…

Q: A student used two scales to measure the length of a nail and recorded the following measurements:…

A: In the measurement of a set, accuracy is the closeness of the measurements to a specific value,…

Q: Hi

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

Q: 8. Which of the following would lead to a higher percent yield than predicted? a) Not allowing the…

A: 8. The correct answer is:a) Not allowing the reaction to go to completionNot allowing the reaction…

Q: What is the mass number for an atom of osmium containing 76 protons and 112 neutrons?

A: The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of…

Q: An unknown element X has the following isotopes: 5X (72.5% abundant) and 67X. What is the average…

A:

Q: Asprin, Cg Hg O4, is synthesized by the reaction of salicylic acid, C7H6 O3, with acetic anhydride,…

A: NOTE: please note the given equation is incorrect. I have corrected it and written proper equation.…

Q: 8. How many grams of KNO3 are contained in 245 mL of 3.00 M KNO3 solution?

A: The molarity of the KNO3 solution is 3.00 M and the volume of the solution is 245 mL. The mass of…

Q: Methanol is prepared industrially according to the following reaction: CO(g) + 2H2(g) D CH3OH9),…

A: Given data, The enthalpy for the formation of methanol = -21.7kCal