Chemistry, 24.11.2020 21:10 alexismarie4881
Which of the following correctly provides the names and formulas of polyatomic ions?
A. carbonate: HCO3–; bicarbonate: CO32–
B. nitrite: NO–; nitrate: NO2–
C. sulfite: S2–; sulfate: SO3–
D. chromate: CrO42–; dichromate: Cr2O72–
Answers: 2
Chemistry, 21.06.2019 16:00
Based on the law of conservation of energy, which statement is false? answer- energy is lost when machines dont work right
Answers: 1
Chemistry, 22.06.2019 01:00
Which of the following is not a true statement about dwarf planets? a the kuiper belt contains comets, asteroids, and dwarf planets. b ceres is a dwarf planet located in the kuiper belt. c the largest known dwarf planet in the solar system is named eris.
Answers: 2
Chemistry, 22.06.2019 10:50
An atom of lithium-7 has an equal number of(1) electrons and neutrons(2) electrons and protons(3) positrons and neutrons(4) positrons and protons
Answers: 2
Chemistry, 22.06.2019 20:00
There are two steps in the usual industrial preparation of acrylic acid, the immediate precursor of several useful plastics. in the first step, calcium carbide and water react to form acetylene and calcium hydroxide: cac2 (s) + 2h2o (g) → c2h2 (g) + caoh2 (s) =δh−414.kj in the second step, acetylene, carbon dioxide and water react to form acrylic acid: 6c2h2 (g) + 3co2 (g) + 4h2o (g) → 5ch2chco2h (g) =δh132.kj calculate the net change in enthalpy for the formation of one mole of acrylic acid from calcium carbide, water and carbon dioxide from these reactions. round your answer to the nearest kj .
Answers: 3
Which of the following correctly provides the names and formulas of polyatomic ions?
A. carbonate:...
Mathematics, 16.01.2020 11:31
Mathematics, 16.01.2020 11:31
History, 16.01.2020 11:31
History, 16.01.2020 11:31
Mathematics, 16.01.2020 11:31
Physics, 16.01.2020 11:31