Stomach ulcers, I've read it online and I take the test
Answer:
The theory of plate tectonics states that the Earth's solid outer crust, the lithosphere, is separated into plates that move over the asthenosphere, the molten upper portion of the mantle. Oceanic and continental plates come together, spread apart, and interact at boundaries all over the planet.
Explanation:
Density= mass/volume
= 100/25
density = 4g/ml
4.00 moles of sodium has a mass of 91.96 grams.
To find an element's molar mass, you can use its atomic weight.
Answer:
Magnets can be used in space. ... One class of magnets, called electromagnets, does need electricity to work.
Explanation:
