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A convection current ...

a. can form in air or water.

b. distributes heat in the oceans.

C. often forms a circular pattern.

d. All of the above

How do the masses of protons and neutrons compare?

Which energy changes takes place when gasoline evaporates from a fuel gas can

Raul and bonnie are trying to classify several objects that they found during a field trip to the beach. they collected a sample of seawater, a piece of driftwood, and several smooth pebbles.

the volume of an ideal gas in a container is 2.0 L what will be the volume of the gas if the pressure on the container is doubled while the temperature is reduced from 400 K to 200 K

If 0.25 mol of HClO2 is added to enough water to prepare a 0.25 M HClO2 aqueous solution, what is the concentration of H3O + (aq) at equilibrium? At this temperature, Kc is 0.15 for the equation, HClO2 (aq) + H2O (l) ⇌ H3O + (aq) + ClO2 - (aq)

Amber has developed a line of organic lotions and handmade soaps with unique, herb-based scents and a touch of bee balm. She plans to sell these products to the wealthy residents of a nearby resort town.

Two pure elements react to form a compound. One element is an alkali metal, X, and the other element is a halogen, Z. Which of the following is the most valid scientific claim that can be made about the compound? a. It has the formula XZ2 b.

Are protons positive and neutrons neutral

Why might it be useful to determine the elements that a planet or moon is made up of?

Which of these is an example of a solution A Sand stirred in water B Sugar stirred in tea C A glass of water with ice in it D Oil and vinegar in a salad dressing jar