Chemistry, 26.11.2021 07:00 jaallen3679
Nguyên tử của nguyên tố X có cấu hình electron lớp ngoài cung là ns2 np4. Trong đó hợp chất khí của nguyên tố X với hidro chiếm 94,12% khối lượng. Vậy X là nguyên tố nào
Answers: 3
Chemistry, 22.06.2019 05:50
Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.
Answers: 2
Chemistry, 22.06.2019 13:30
Table sugar completely dissolved in water is an example of a?
Answers: 1
Chemistry, 22.06.2019 23:00
Consider the reaction: 2al(s) + fe2o3(s) → al2o3(s) + 2fe(s) the δhf for fe2o3(s) = -824.3 kj/mole. the δhf for al2o3(s) = -1675.7 kj/mole. finish the equation. δhrxn = [(1)( kj/mole) + (2)( kj/mole)] - [(1)( kj/mole) + (2) ( kj/mole)]
Answers: 1
Chemistry, 23.06.2019 05:30
What is the morality of 2.50 l of solution that contains 1.85 mol of anhydrous sodium tetraborate?
Answers: 1
Nguyên tử của nguyên tố X có cấu hình electron lớp ngoài cung là ns2 np4. Trong đó hợp chất khí của...
English, 03.05.2020 13:19
English, 03.05.2020 13:19
Mathematics, 03.05.2020 13:19
Mathematics, 03.05.2020 13:19
Computers and Technology, 03.05.2020 13:19
Mathematics, 03.05.2020 13:19
Mathematics, 03.05.2020 13:19
Mathematics, 03.05.2020 13:20
Mathematics, 03.05.2020 13:20
History, 03.05.2020 13:20
English, 03.05.2020 13:20
English, 03.05.2020 13:20