I have a chemistry question?
Arsenic plus sodium or chlorine Na3As or AsCl3 .......... Both compounds have bonds with high covalent character. The conventional way of thinking is that arsenic, with five valence electrons, can share three more electrons from either sodium or chlorine, and complete the p-sublevel, giving it an octet of electrons. ..... 4p ↑_ ↑_ ↑_ 4s ↑↓ ...As valence electrons ... Contrary to the common oversimplification neither is "ionic." The bonds in Na3As have approximately 32% ionic character (68% covalent). The bonds in AsCl3 have approximately 21% ionic character (79% covalent). Both react with water. Neither "splits up into ions." Na3As(s) + HOH(l) --> 3NaOH(aq) + AsH3(g) ........ AsH3(g) is slightly soluble in H2O AsCl3(l) + HOH(l) --> HCl(g) + As(OH)3(s) ...... most HCl is a gas, some dissolves ...... 2As(OH)3 <==> As2O3(s) + 3H2O(l) ........ As(OH)3 is in equilibrium with As2O3, and multiple other species which include: As2O(OH)4, As2O2(OH)2, As3O3(OH)3, As4O6, and As6O6(OH)3
I have a question on chemistry.?
An electrically powered pump is used to pull water out of a well. In the course of an afternoon, the pump does 8.3 kJ of work lifting water out of a well. It also heats up, and releases 300 J of heat to the environment before returning to its original temperature. If there was no net change in the energy of the pump, how much electrical energy was required?
I have a question on chemistry?
Alright i have two chemistry problems that i cant figure out: Select one metal which will displace Sn from a compound and form metallic tin (Sn). 1. Cu 2. Ag 3. Hg 4. Cr Also, i cant figure out: Which one of the following reactions would you predict would not occur? 1. Zn + CuSO4YIELDS ZnSO4 + Cu 2. Pb + 2NaCl YIELDS PbCl2 + 2Na 3. 3Na + AlCl3 YIELDS 3NaCl + Al 4. Fe + 2HCl YIELDS FeCl2 + H2 Any help would be appreciated.
I have a chemistry question?
Arsenic plus sodium or chlorine Na3As or AsCl3 .......... Both compounds have bonds with high covalent character. The conventional way of thinking is that arsenic, with five valence electrons, can share three more electrons from either sodium or chlorine, and complete the p-sublevel, giving it an octet of electrons. ..... 4p ↑_ ↑_ ↑_ 4s ↑↓ ...As valence electrons ... Contrary to the common oversimplification neither is "ionic." The bonds in Na3As have approximately 32% ionic character (68% covalent). The bonds in AsCl3 have approximately 21% ionic character (79% covalent). Both react with water. Neither "splits up into ions." Na3As(s) + HOH(l) --> 3NaOH(aq) + AsH3(g) ........ AsH3(g) is slightly soluble in H2O AsCl3(l) + HOH(l) --> HCl(g) + As(OH)3(s) ...... most HCl is a gas, some dissolves ...... 2As(OH)3 <==> As2O3(s) + 3H2O(l) ........ As(OH)3 is in equilibrium with As2O3, and multiple other species which include: As2O(OH)4, As2O2(OH)2, As3O3(OH)3, As4O6, and As6O6(OH)3
I have two organic chemistry questions!?
1) Br2; NaNH2 (3 equivalents); water 2) H2SO4, H2O -> dibromide to aldehyde Corey-Fuchs reaction on aldehyde butanal + CBr4 + PPh3 -> 1,1-dibromopentene 1,1-dibromopentene + 2 eq. BuLi -> pentyne anion pentyne anion + H2O -> 1-pentyne Disclaimer, I am the author of "A Guide to Organic Chemistry Mechanisms" (Amazon.com, Barnes and Noble or http://www.curvedarrowpress.com ).
I have some chemistry questions.?
1. The volume of a gas at 93.0 kPa is 500.0 mL. If the pressure is increased to 221 kPa, what will be the new volume? 2. A gas at 99°C occupies a volume of 0.67 L. At what Celsius temperature will the volume increase to 1.39 L? 3. A sample of gas of unknown pressure occupies 0.779 L at a temperature of 294 K. The same sample of gas is then tested under known conditions and has a pressure of 30.7 kPa and occupies 0.659 L at 303 K. What was the original pressure of the gas? 4. Determine the kelvin temperature required for 0.0538 mol of gas to fill a balloon to 1.20 L under 0.980 atm pressure. 5. How many liters of propane gas (C3H8) will undergo complete combustion with 30.4 L of oxygen gas? Thanks for any help! :D
Where can I find daily questions for chemistry?
Hi!You can find them at - CBSE Syllabus, Sample Papers, Test Papers . The question papers are absolutely free and you can download it any moment. But to have access to answers, you have to pay a certain amount (I don’t know how much exactly). I personally think that this site is better than The No.1 Education Site with Study Material & Live Classes for CBSE, ICSE, CPT, IITJEE, AIPMT & more (Meritnation).Thanks for A2A Virinchi Puranapu.
From where do I refer revision questions for chemistry?
Well you haven’t said What is the purpose of your study:There are so many sources are there;Public libraryInternetA good book written by a well known author and published by a well known publisher.Clear basicsNCERT 8, 9, 10, 11 and 12 std books
I have a question about chemistry.. I need help as soon as possible!?
A and C Fragrance spreads through a process known as diffusion, where molecules travel from a volume of higher concentration to a lower one. This will happen without the addition of any energy and is therefore spontaneous. Nitrogen and oxygen will not separate easily, needing energy to be applied to make it happen, so that is not spontaneous. Soap bubbles are unstable and they will pop without intervention, that is spontaneous.
I have a question on volume for a chemistry exam. A breakdown of the problem would really help. Thanks?
Okay. Step 1, find the volume of silver. Step 2, add it to the volume of water. Step 1: d = m/v so v = m/d v = 35.6g/10.5g/ml v = 3.39047... Looks like rounding to the nearest tenth should work, so... v = 3.4 ml. Step 2: 18.0 + 3.4 = 21.4 ml