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4 years ago

Can someone help me with number two pls

Chemistry

2 answers:

natulia [17]4 years ago

8 0

Answer:

The answer is G

Explanation:

this is because of what a element looks like on a periodic table

seropon [69]4 years ago

4 0

Answer:

F. 1 and 3

Elements are pure substance

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Suppose you are given samples of pentane, 2,2-dimethylpropane, 2-methylbutane and hexane. how you would go about determining whi

Annette [7]

Answer:

Addiction

Explanation:

7 0

3 years ago

Convert 7.1x10^25 molecules of water to moles

ruslelena [56]

Answer:

<h2>117.94 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

$n = \frac{N}{L} \\$

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

$n = \frac{7.1 \times {10}^{25} }{6.02 \times {10}^{23} } \\ = 117.940199...$

We have the final answer as

<h3>117.94 moles</h3>

Hope this helps you

8 0

3 years ago

Underneath the ocean floor, methane can exist as a solid known as methane hydrate. Methane hydrate forms when large amounts of m

mezya [45]

Answer:

Methane is present in solid, liquid and gaseous form.

Explanation:

Methane hydrate is present in solid state when the hydrogen-bonded water and methane gas come into contact at high pressures and low temperatures in the deep oceans while on the other hand, methane which is present inside the earth surface in gaseous form due to non-availability of water that can combine with methane. Methane is also found in liquid form when it is cool with high pressure and low temperature.

8 0

3 years ago

Now I know that to measure earthquakes, geologists use seismic waves to determine....

yarga [219]

Geologists use seismic waves to learn about and establish the structure of the Earth’s interior.

7 0

3 years ago

Describe the celestial object in the image. The object is called a because it is producing and has not yet .

svlad2 [7]

The image, blanks and options are missing in the question. So the image is attached below and the complete question is:

Describe the celestial object in the image.

The object is called________ a because it is producing _______ and has not yet ________ .

First Blank: A.Meteor B.Meteorite C.Meteoroid

Second Blank: A. a streak of light B. An orange Horizon C. A star- Filled sky

Third Blank: A. Reached earths atmosphere B. Struck Earth C. Completed an orbit

Answer:

First Blank - A. Meteor

Second Blank - A. a streak of light

Third Blank - A. Reached earths atmosphere

Explanation:

The given image shows celestial object called meteor.

The meteor is often called shooting star as it produces a streak of light. When a meteoroid reaches Earth's atmosphere, it experiences a friction which allows the meteoroid to burn up and produce a streak of light in the sky.

Hence, the correct answer for blanks is Meteor, a streak of light and Reached earths atmosphere.

3 0

3 years ago