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

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

The gulf stream is a warm water current that flows away from the equator to northern europe. witch of these does it cause. a. crashes of warm and cool water in the ocean b.colder climates near the equator c.large waves on the cost of europe d.warm climates in northern europe

The fact that the total amount of energy in a system remains constant is a(n)