3 years ago

Please help me with question number 7 if you need help read the article on top

1 answer:

4 0

Compositional layer:
Crust- thickness: oceanic(5 to 10 km) continental(ranges from 15 to 70 km), relative density: little density

Mantle- thickness: 2,900 km, relative density: denser than the earths crust

Core- thickness: 3,400 km, relative density: twice as dense as the mantle

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What causes a substance to change states of matter?

kolezko [41]

Salutations!

What causes a substance to change states of matter?

Energy causes a substance to change states of matter. A matter needs energy to melt, evaporate, boil. Remember: Energy has a sudden change, but the temperature remains absolutely the same. An example of a change in energy is when ice is melting.

Hope I helped (:

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8 0

3 years ago

What type of compound is CH3―O―CH2―CH2―CH3?

Lelu [443]

Ether

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4 years ago

50.0 g of NaNO3 are dissolved into enough water to make 250 mL of solution. What is the molarity of this solution?

d1i1m1o1n [39]

Answer:

2.35 M

Explanation:

Molarity is mol/L of solution. We have to convert the g to mol and the mL to L. G to mol uses the molar mass of the compound. The molar mass of NaNO₃ is 85.00g/mol.

$50.0gNaNO3*\frac{1molNaNO3}{85.00gNaNO3} = 0.588molNaNO3$