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3 years ago

Food chains always begin with what type of organism? Why?

Chemistry

1 answer:

Inessa05 [86]3 years ago

6 0

The food chain always begins with a sun without it there would be no food chain... hope this helped!

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PLZZZ HELP!!! A chemist has synthesized a heavy element in the laboratory and found that it had this electron configuration:

Hitman42 [59]

Answer:

Darmstadtium! Happy to help! :)

5 0

3 years ago

What does the law of convservation of matter show?

velikii [3]

The law of conservation of energy states that energy is never created or destroyed only converted.

3 0

3 years ago

Use the picture below to answer the question. What is true about the relationship between the wavelength and the frequency of th

KatRina [158]

The picture is not loading as it requires a sign in.
However, I can tell you how to solve this.

Answer:
As the wavelength gets shorter (closer together), the frequency of the wave increases.

Explanation:
The relation between frequency and wavelength can be described by the help of velocity as follows:
velocity = frequency * wavelength
This means that:
frequency = velocity / wavelength
Noting this equation, we will find that:
The frequency and the wavelength are inversely proportional to each other. This means that as the frequency increases, the wavelength decreases and vice versa.
Now, examining the choices given, we can find that the only statement showing the inverse relation between frequency and wavelength is:
As the wavelength gets shorter (closer together), the frequency of the wave increases.

Hope this helps :)

8 0

4 years ago

5. How can you tell the difference between CuS and Cu2S

Oxana [17]

Prominent copper sulfide minerals include Cu2S (chalcocite) and CuS (covellite).

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3 years ago

How many grams of chlorine gas are present in a 150. liter cylinder of chlorine held at a pressure of 1.00 atm and 0. °C? Group

OlgaM077 [116]

Answer:

474 grams of chlorine gas are present in a 150 liter cylinder of chlorine held at a pressure of 1.00 atm and 0 °C

Explanation:

An ideal gas is a theoretical gas that is considered to be composed of randomly moving point particles that do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.

The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:

P*V = n*R*T

where P is the gas pressure, V is the volume that occupies, T is its temperature, R is the ideal gas constant, and n is the number of moles of the gas.

In this case:

P= 1.00 atm
V= 150 L
n= ?
R= 0.082 $\frac{atm*L}{mol*K}$
T= 0 C= 273 K

Replacing:

1.00 atm* 150 L= n*0.08206 $\frac{atm*L}{mol*K}$ *273 K

Solving:

$n=\frac{1.00 atm* 150 L}{0.08206 \frac{atm*L}{mol*K}*273 K}$

n= 6.69 moles

Being Cl= 35.45 g/mole, the molar mass of chlorine gas is:

Cl₂=2*35.45 g/mole= 70.9 g/mole

So if 1 mole has 70.9 grams, 6.69 moles of the gas, how much mass does it have?

$mass=\frac{6.69 moles*70.9 grams}{1 mole}$

mass= 474.321 grams ≅ 474 grams

474 grams of chlorine gas are present in a 150 liter cylinder of chlorine held at a pressure of 1.00 atm and 0 °C

4 0

3 years ago