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2 years ago

Which of the following best describes earth tectonic plates ?

Chemistry

2 answers:

saw5 [17]2 years ago

8 0

Im pretty sure the answer is B.

meriva2 years ago

6 0

Answer:

B They move because of the convection currents in the mantle.

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A _____ change occurs when a substance changes phase. physical chemical nuclear user: the latent heat of vaporization of ethanol

dezoksy [38]

physical

about 200 calories of heat must be added to 1 gram of ethanol to convert it from a liquid to a gas

3 0

3 years ago

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Now that Snape and Dumbledore has taught you the finer points of hydration calculations they have a slightly more challenging pr

Mrrafil [7]

Answer:

The value of an integer x in the hydrate is 10.

Explanation:

$Molarity=\frac{Moles}{Volume(L)}$

Molarity of the solution = 0.0366 M

Volume of the solution = 5.00 L

Moles of hydrated sodium carbonate = n

$0.0366 M=\frac{n}{5.00 L}$

$n=0.0366 M\times 5 mol=0.183 mol$

Mass of hydrated sodium carbonate = n= 52.2 g

Molar mass of hydrated sodium carbonate = 106 g/mol+x18 g/mol

$n=\frac{\text{mass of Compound}}{\text{molar mass of compound}}$

$0.183 mol=\frac{52.2 g}{106 g/mol+x\times 18 g/mol}$

$106 g/mol+x\times 18 g/mol=\frac{52.2 g}{0.183 mol}$

Solving for x, we get:

x = 9.95 ≈ 10

The value of an integer x in the hydrate is 10.

6 0

3 years ago

A coyote and an oak tree both have DNA?

denis-greek [22]

Answer:

true, they both have different types of DNA.

7 0

3 years ago

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Which of these is a compound??

koban [17]

Potassium ......................

6 0

3 years ago

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Carbon (C): 1s(H)2s(I)2p(J) What is H, I, and J equal?

Artemon [7]

Answer:

H =2; I = 2; J = 2

Explanation:

Carbon is element 6 in the Periodic Table.

Start at element 1 (H) and count from left to right until you reach element 6 (C).

You get the electron configuration

C: 1s² 2s²2p².

Thus,

H =2; I = 2; J = 2

3 0

3 years ago