What is the change in enthalpy (in kJ mol¯1) of the following reaction at 424°C? ASI3(g) - AsI3(1) 1) -59.3 kJmol¯1 2) -21.8 kJmol¯1 3) 21.8 kJmol¯1 4) 59.3 kJmol1

Q: 3. Oxygen has an atomic number of 8, an atomic mass of 16, and it is neutrally charged.

A:

Q: In Mexico the cost of avocados are 48 pesos per kg. What is the cost in cents of an avocado that…

A: Question 1: Cost of Avocados in Different CurrenciesIn this question, we'll convert the cost of…

Q: The Periodic Table of Elements is arranged based on the atomic number. Hence, it is arranged based…

A: General chemistryThe Periodic Table of Elements is arranged based on the atomic number. Hence, it is…

Q: HNO3 NBS H,SO4 light AICI3 Fe HCI

A: Chemical reaction:

Q: 2. Which compound (C12H22011 or NH,CI )contains the most total number of atoms?

A:

Q: 10 magnesium nitride 11 gold (I) chloride 12 gold (III) chloride 13 gold (I) sulfide 14 gold (III)…

A: To write the  formula of a compound, first identify the cation and write down its symbol and charge.…

Q: Use your periodic table for this question. If you weigh 79.904 ounces of Bromine, how many ounces of…

A: Answer:Each mole of a sample always has  particles, so if two samples of different species have the…

Q: State law of definite proportions.

A: Given: Law of definite proportions.

Q: information, deduce the formulas for compounds with the following codes: (a) 12 (b) 113 (c) 123 (d)…

A: The chemical formula for the chlorofluorocarbons = 90+ codeFrom the numeral,the first digit in the…

Q: How many hydrogen atoms are there on the carbon atom labeled "A"?

A:

Q: Describe the period table.how is it organized

A: Given: Periodic table To find: Periodic table and how it is organized Solution: There are many…

Q: 96. Plutonium-239 is used in nuclear bombs. Determine the number of protons and neutrons in…

A: The atomic number of an element represent the number of protons present in the nucleus of that atom.…

Q: Part 2 of 2 0.780 g C12H22O11 = mol C12H22O11 x10 === 7.00 g C12H22O11 mol C12H22O11 x10 G

A: To calculate the molar mass of C12​H22​O11​ we need to know the atomic masses of carbon (C),…

Q: What is the name of the alkali metal that is in period 3? What is the name of the halogen that is in…

A: The above question is based in preodic table. A period  is a row of chemical elements in the…

Q: How many hydrogen atoms are there on the carbon atom labeled "B"?

A:

Q: In Express your answer as an integer. N=                              Electrons    Ca Express your…

A: In Neutral atom, number of electrons are always equivalent to atomic number of that atom.

Q: In a chemical reaction, what happens to the total mass of the reactants and products? A) The total…

A: The chemical reaction follows the law of conservation of mass. According to the law of conservation…

Q: 1. CACO3 23 BaF2 3. 4 H2PO4 4 Sr(OH)2 5.3 Al2(Cr207)3

A: Given :-  1.     CaCO3  2.     3 BaF2  3.      4 H2PO4  4.      Sr(OH)2  5.      3 Al2(Cr2O7)3  To…

Q: An ion has 14 protons, 10 neutrons, and 12 electrons. The symbol for the ion is 26, 2- 'Ne o 2852…

A: Identification of symbol of an ion For an atom  Atomic no =  protons Neutrons = mass no - atomic no…

Q: Compound Description J K L colorless, odorless gas 3-33 g colorless, odorless gas 3.52 g Mass of…

A: To answer following questions, we would first determine the chemical formula of all compounds by…

Q: HI H2O

A: An arrow always depicts from a region of high electron density to low electron density ; that is…

Q: Show all your work on a sheet of paper to solve the following problem. Full credit is based upon the…

A:

Q: Determine the number of protons and the number of electrons in ion. S2-

A: Atomic number is equal to the number of protons. The atomic number of the given ion is 16. So, the…

Q: How did John dalton  describe the way compounds are formed?

A:

Q: 17. Write the atomic mass for Carbon to 3 significant figures.

A: Carbon is non metal  Carbon Symbol is C  Carbon atomic number  is 6  Carbon electronic configuration…

Q: what is proton?

A: Protons are the positively charged species that are present in the nucleus of an hydrogen atom. An…

Q: A tiny sample of gold contains  1.5 x 10^16 atoms. The mass of the gold sample is ______  μg.

A: Given the number of gold atoms, the tiny sample contains = 1.5*1016 atoms We have to find the mass…

Q: Part 1 of 2 Rank these compounds in order of increasing boiling point. O O OH OH (Choose one) 1…

A: The temperature at which the vapor pressure of a liquid becomes equal to the atmospheric pressure is…

Q: Devise a system of chemical symbols that is easy to use by answering the questions below. Look up…

A: For writing chemical symbols one or two letters are used and first one is written in capital letter…

Q: 5. While cleaning your attic, you find your old rock collection. If 74.2% of the rocks have a rock…

A:

Q: Using the Periodic Table, give the name and symbol of the noble gas that is in Period 6.

A: Noble gases : Noble gases have completely filled outermost shell .They are generally unreactive or…