Chemistry, 28.06.2019 10:00 stphdrn4347
Which of the following observations indicates that atoms of all elements contain small, negatively charged particles? a - alpha particles are repelled by cathode rays of elements. b- cathode rays are deflected towards a positively charged rod. c- a particular frequency of light is produced by a gas in an excited state. d- certain areas of the atom called orbitals contain all the charged particles.
Answers: 2
Chemistry, 21.06.2019 14:30
Alculate the concentration of h3o⁺in a solution that contains 5.5 × 10-5m oh⁻at 25°c. identify the solution as acidic, basic, or neutral.a) 1.8 × 10-10m, basicb) 1.8 × 10-10m, acidicc) 5.5 × 10-10m, neutrald) 9.2 × 10-1m, acidice) 9.2 × 10-1m, basic
Answers: 1
Chemistry, 21.06.2019 22:30
1. combine iron and copper (ii) sulfate solution. (hint: iron will form the iron (iii) ion) fe + cuso4 → 2. combine lead (ii) nitrate and potassium iodide solutions. pb(no3)2+ kl → 3. combine magnesium metal and hydrochloric acid solution. mg + hcl → 4. electrolysis (splitting) of water. h2o → 5. burning magnesium. mg + o2 →
Answers: 3
Chemistry, 22.06.2019 11:00
Problem page combustion of hydrocarbons such as pentane ( c5 h12 ) produces carbon dioxide, a "greenhouse gas." greenhouse gases in the earth's atmosphere can trap the sun's heat, raising the average temperature of the earth. for this reason there has been a great deal of international discussion about whether to regulate the production of carbon dioxide.(a) write a balanced chemical equation, including physical state symbols, for the combustion of liquid pentane into gaseous carbon dioxide and gaseous water. (b) suppose 0.350 kg of pentane are burned in air at a pressure of exactly 1 atm and a temperature of 20.0 degree c. calculate the volume of carbon dioxide gas that is produced.be sure your answer has the correct number of significant digits.
Answers: 2
Chemistry, 22.06.2019 11:00
Which element would mostly likely have an electron affinity measuring closest to zero
Answers: 3
Which of the following observations indicates that atoms of all elements contain small, negatively c...
Chemistry, 31.03.2020 21:56
Mathematics, 31.03.2020 21:56
Mathematics, 31.03.2020 21:56
English, 31.03.2020 21:56
Mathematics, 31.03.2020 21:56
Mathematics, 31.03.2020 21:56
English, 31.03.2020 21:56
History, 31.03.2020 21:56
Mathematics, 31.03.2020 21:56
Mathematics, 31.03.2020 21:56
History, 31.03.2020 21:56
Mathematics, 31.03.2020 21:56
Mathematics, 31.03.2020 21:56
Geography, 31.03.2020 21:56