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olga nikolaevna [1]

3 years ago

10

About one hundred thousand years ago, very fluid lava started erupting slowly and gently from a place near a plate boundary. Wha

t best describes the slope of the mountain that resulted from such a phenomenon?

1 answer:

Tema [17]3 years ago

6 0

Answer:

Steep slope with high mountain, as these are formed by a composite volcano

Explanation:

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What does a useful scientific explanation include ??

ArbitrLikvidat [17]

Answer: scientific explanation

Explanation:

A really good scientific explanation should do two main things: It should explain all the observations and data we have. It should allow us to make testable predictions that we can check using future experiments.

7 0

3 years ago

Which sequence represents the relationship between pressure and volume of an ideal gas as explained by the kinetic-molecular the

Dmitriy789 [7]

That they are random, constant, and straight -line motion.

8 0

3 years ago

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555mL of gas is combined at standard temperature and pressure(STP). The volume changes to 660.mL at 30.5 °C. What is the new pre

liberstina [14]

Answer:0.94

Explanation:

4 0

3 years ago

How many moles of molecules are in 40g of H2O?

soldier1979 [14.2K]

Molecular mass of H2O is: 16+2*1=18
so moles of 40g of H2O is: 40/18=2.22

6 0

3 years ago

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What is the ph of a solution labeled .30 trimethylamine k for trimethylamine is 7.42 x 10^4

valentina_108 [34]

Answer:the pH is 12

Explanation:

First We need to understand the structure of trimethylamine

Due to the grades of the bond in the nitrogen with a hybridization sp3 is 108° approximately, then is generated a dipole magnetic at the upper side of the nitrogen, this dipole magnetic going to attract a hydrogen molecule of the water making the water more alkaline

C3H9N+ H2O --> C3H9NH + OH-

$k=\frac{[C3H9NH]*[OH-]}{[C3H9N]}$

Then:

The concentration of the trimethylamine is 0.3 and the concentration of the ion C3H9NH is equal to the OH- relying on the stoichiometric equation. We could find the concentration of the OH- ion with the square root of the multiplication between k and the concentration of trimethylamine

[OH-]= $\sqrt{ 0.3*7.42x10^{-4}}$

[OH-]=0.01

pH=14-(-log[OH-])

pH=12

5 0

3 years ago