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3 years ago

_ rock can be changed directly into _ rock with the application of heat and pressure.

Chemistry

2 answers:

german3 years ago

6 0

I’m fairly certain the first one is igneous and the second is metamorphic...
Sorry if I’m no help!

irina [24]3 years ago

3 0

Sedimentary , metamorphic

Sedimentary rocks can be transformed into metamorphic rocks through heat and pressure. Metamorphic and igneous rock are made into sedimentary rock through the processes of erosion, weathering, and compaction.

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Please help I’ll mark brainliest!

Anni [7]

Answer:

D because excited electrons fall back.....

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3 years ago

Read 2 more answers

What is the change in air pressure over a given distance called? wind speed air pressure force factor air pressure gradient

lubasha [3.4K]

The change in pressure over a given distance is defined as a pressure gradient. The strength of this pressure gradient determines how fast the wind moves from higher pressure toward lower pressure. A stronger pressure gradient will cause stronger winds, as shown in Figure 2. >> Balanced in the vertical by the force of gravity

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3 years ago

Elements occur in a number of isotopic forms. In this problem, you will learn about the notation used to distinguish different i

alina1380 [7]

Answer:

Number of protons, Z = 14
Number of neutrons, N = 14

Explanation:

1) About isotopes:

Isotopes are different kind of atoms of the same element. Hence, they have the atomic number (Z), which is the number of protons, the same number of electrons (talking about to neutral atoms, not ions), and different number of neutrons N).

This is, it is the number of neutrons what distinguish different isotopes of an element.

2) About the notation used to distinguish different isotopes:

A superscript and a subscript, both to the left of the chemical symbol of the element, are used to distinguish different isotopes:

A ←------------- This superscript tells the mass number of the isotope

X ←--------- This is the chemical symbol of the element

Z ←-------------- This subscript is the atomic number of isotope

In our case, the notiation for the isotope of silicon is: ²⁸₁₄ Si

So, we have:

28 is the mass number (A)
14 is the atomic number (Z)
Si is the chemical symbol.

Now, you can answer the questions of the part A:

Number of protons: Z = 14

Number of neutrons N:

mass number = number of protons + number of neutrons

A = Z + N

⇒ N = A - Z = 28 - 14 = 14

In conclusion:

Number of protons, Z = 14
Number of neutrons, N = 14

5 0

4 years ago

How does gravity depend on the mass of two objects

AleksAgata [21]

Gravity increases as the mass of either object increases.

<h3>What is gravity?</h3>

Gravity is the force by which a planet or other body draws objects toward its centre. The force of gravity keeps all of the planets in orbit around the sun.

Since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. So as the mass of either object increases, the force of gravitational attraction between them also increases.

Learn more about the gravity here:

brainly.com/question/4014727

#SPJ1

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2 years ago

Contrast the chemical reactivity of potassium lithium and sodium

Colt1911 [192]

Answer is: lithium is the least reactive and potassium is the most reactive of the three alkali elements.
The reactivity of the alkali metals increases down the group because one valence electron (I group of Periodic system of elements) is farther away from nucleus and attraction force between electron and proton is weaker.

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3 years ago

_______ rock can be changed directly into _______ rock with the application of heat and pressure.

_ rock can be changed directly into _ rock with the application of heat and pressure.