Which of these is a compound?

A. Carbon dioxide

B. air

C. carbon

D. oxygen

Which statement is true about the magnet and nails? A) Both the magnet and the nails are permanent magnets. B) Both the magnet and the nails are temporary magnets. C) The magnets are temporary. D) The magnets are permanent.

How many times stronger was the earth's magnetic field in 800 B. C.? a. 1.5 times b. 2 times c. 3 times d. 4 times

What is the advantage of using scientific notation over decimal notation?

An engineer designing a new type of engine needs a liquid that can be heated and cooled quickly with as little exchange of energy as possible. Which property should the engineer primarily look for in the liquid?

Three gases (8.00 g of methane, ch4, 18.0 g of ethane, c2h6, and an unknown amount of propane, c3h8) were added to the same 10.0-l container. at 23.0 ∘c, the total pressure in the container is 5.50 atm.

Is it possible for 2 different elements to have the same atomic number

How is the mole similar to a dozen?

What element with the highest electronegativity value? Cesium calcium helium fluorine

How many neutrons and electrons are in Oxygen⁻¹⁷ isotope?

What is science all about?