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Earth's atmosphere is composed mostly of nitrogen and oxygen. In order to float, a ballon has to be filled with something that is lighter than air.

Which of the following is the largest contributor to the salt ions in the ocean? Select one of the options below as your answer: a. sodium b. chloride c. sulfates d. calcium

Diamond and graphitr are made of what

In general what determines whether atoms will form chemical bonds

An isopropyl solution contains 70 ml of isopropyl alcohol in 1.8 L of water. What is the percent by volume of the alcohol

When two atoms are bonded together via electrons, and one of those atoms has a greater pull upon the electrons shared, the bond formed would be?

Which party system is most common in a typical dictatorship?

According to the kinetic-molecular theory, the collision between two ideal gas particles is a result of neither attraction nor repulsion. repulsion from the wall of the container. repulsion from other gas particles.

A plant grows three inches in a month. Why is this a physical change?

In natural convection heat transfer, the parameter is the Choose the right answer a) Nusselt number b) Rayleigh number c) Grashof number d) Lewis number