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3 years ago

What is the feature called when a volcanic_________ hardens and the volcano becomes extinct.

1 answer:

8 0

Volcanoes go dormant because magma from the Earth's mantle can no longer reach the volcano. ... Meanwhile, the supply of magma stays in the same place within the Earth, which currently happens to lie beneath the Big Island.

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How do you raise the boiling point of a liquid?

Naddika [18.5K]

Raise the boiling temperature

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3 years ago

Which of the following latitudes receive the most direct solar energy?

Misha Larkins [42]

Answer:

The answer to your question is D.

Explanation:

The latitudes near the equator receives the most direct solar energy.

Hope this helps :)

8 0

3 years ago

Hydrogen has three naturally occurring isotopes which figure into the average atomic mass found on the periodic table (1.00974):

Art [367]

The number following the name of the element is the number of subatomic particles inside the nucleus of the atom. This means that it is the mass number of the isotope. The average atomic mass of the element is the sum of the products of the percentage abundance and mass number of the naturally occurring isotopes.

Since, the average atomic mass of the hydrogen is nearest to 1 then, the most abundant isotope should be hydrogen-1.

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3 years ago

Which of the following gases would have the greatest kinetic energy at 300 K?

tekilochka [14]

Answer:

D. All of them would have the same kinetic energy

Explanation:

The expression for the kinetic energy of the gas is:-

$K.E.=\frac{3}{2}\times K\times T$

k is Boltzmann's constant = $1.38\times 10^{-23}\ J/K$

T is the temperature

<u>Since, kinetic energy depends only on the temperature. Thus, at same temperature, at 300 K, all the gases which are $N_2,\ NH_3\ and\ Ar$ will posses same value of kinetic energy.</u>

4 0

3 years ago

When polonium-210 emits an alpha particle, the child isotope has an atomic mass of

Sergeeva-Olga [200]

Answer: The child isotope has an atomic mass of 206.

Explanation:

Alpha decay : When a larger nuclei decays into smaller nuclei by releasing alpha particle. In this process, the mass number and atomic number is reduced by 4 and 2 units respectively.

General representation of an element is given as: $_Z^A\textrm{X}$

where,

Z represents Atomic number

A represents Mass number

X represents the symbol of an element

General representation of alpha decay :

$_Z^A\textrm{X}\rightarrow _{Z-2}^{A-4}Y+_2^4\alpha$

$_{84}^{210}\textrm{Po}\rightarrow_{82}^{206}\textrm{Pb}+_2^4\textrm{He}$

8 0

3 years ago

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