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2 years ago

What is the first step of the scientific method?

Chemistry

1 answer:

IgorLugansk [536]2 years ago

4 0

Answer:

I believe your answer is B) make a prediction

Explanation:

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Diffrent Between Gas and Ai

kati45 [8]

Answer:

Air is a collection of different gases. Mainly nitrogen, and then oxygen. Gas is loosely bound atoms of an element or collection of such in compounds above the temperature required to make them liquid, and colder to make them solid.

Explanation:

hmu if you anything els!

6 0

2 years ago

Give the relation of energy (E) and frequency (v) as given by Planck. Calculate the frequency and energy of a photon of radiatio

andrew-mc [135]

Solution:-1

$\\ \sf\longmapsto E=hv$

E denotes to Energy
h denotes to planks constant
v denotes to frequency.

Solution:-2

Wavelength=3000Å

$\boxed{\sf \lambda=\dfrac{c}{v}}$

$\\ \sf\longmapsto v=\dfrac{c}{\lambda}$

$\\ \sf\longmapsto v=\dfrac{3\times 10^8m/s}{3000\times 10^{-10}m}$

$\\ \sf\longmapsto v=0.001\times 10^{18}s^{-1}$

$\\ \sf\longmapsto v=1.0\times 10^{15}s^{-1}$

Now

$\\ \sf\longmapsto E=hv$

$\\ \sf\longmapsto E=6.626\times 10^{-34}Js\times 1.0\times 10^{15}s^{-1}$

$\\ \sf\longmapsto E=6.6\times 10^{-19}J$

4 0

2 years ago

What structure helps the earthworm form cocoons

vodka [1.7K]

Go to this website it will help you alot
http://cocoon.org/earthworm-cocoon/
hope it helps
:)

7 0

2 years ago

37) Calculate the volume of a 125.66 g solid cylinder with a density of 2.60 g/cm?.

wolverine [178]

Answer:

<h3>The answer is 48.33 mL</h3>

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

$volume = \frac{mass}{density} \\$

From the question

mass = 125.66 g

density of cylinder = 2.60 g/cm³

We have

$volume = \frac{125.66}{2.6} \\ = 48.3307692...$

We have the final answer as

Hope this helps you

8 0

2 years ago

Read 2 more answers

Look at the image shown

klemol [59]

Answer:

b) Linear molecule with two domains

Explanation:

The image represents a linear molecule with two domains.

The compound shown here is carbon dioxide in which a central carbon atom is surrounded by two oxygen atoms.

This bond geometry is of the type AX₂
In this linear molecule the bond angle is a perfect 180°
The lone pairs are perfectly balanced out and will not cause distortion of the central carbon.

5 0

3 years ago