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3 years ago

Thermal energy from the sun travels to earth as waves

Chemistry

2 answers:

malfutka [58]3 years ago

7 0

Of course it does...

ZanzabumX [31]3 years ago

5 0

direct transfer of energy by electromagnetic waves. What kind of energy do we receive from the sun? Most of the energy from the sun travels to Earth in the form of visible light and infrared radiation. A small amount arrives as ultraviolet radiation.

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Suppose now that you wanted to determine the density of a small crystal to confirm that it is graphite. From the literature, you

kirza4 [7]

Answer:

The volume of first and second compound are 9.15 ml and 10.85 ml.

Explanation:

Given that,

Density of graphite = 2.25 g/cm³

Volume of mixture = 20.0 mL

Density of first compound = 1.492 g/ml

Density of second compound = 2.890 g/ml

Let the volume of first mixture = x

The volume of second mixture = (20-x)....(I)

We need to calculate the volume of first compound

Using formula of density of mixture

$\rho=\dfrac{V_{1}\rho_{1}+V_{2}\rho_{2}}{V_{1}+V_{2}}$

Where, $V_{1}$ = volume of first compound

$V_{2}$ = volume of second compound

$\rho_{1}$ =density of first compound

$\rho_{1}$ = density of first compound

Put the volume into the formula

$2.25=\dfrac{x\times1.492+(20-x)\times2.890}{x+20-x}$

$45=1.492x+57.8-2.890x$

$45-57.8=1.492x-2.890x$

$12.8=1.398x$

$x=\dfrac{12.8}{1.398}$

$x=9.15\ ml$

We need to calculate the volume of second compound

Using equation (I)

$V_{2}=20-x$

Put the value of x

$V_{2}=20-9.15$

$V_{2}=10.85\ ml$

Hence, The volume of first and second compound are 9.15 ml and 10.85 ml.

5 0

3 years ago

Which two substances are among the four major types of organic compounds made by living things

Reil [10]

Which two substances are among the four major types or organic compounds made by living things, The answer C,
would be carbon dioxide

5 0

3 years ago

Determine the volume in liters occupied by 22.6 g of I2 gas at STP.

AleksandrR [38]

The volume in liters occupied by 22.6 g of I₂ gas at STP is 1.99 L (answer A)

calculation

Step: find the moles of I₂

moles= mass÷ molar mass

from periodic table the molar mass of I₂ is 253.8 g/mol

moles = 22.6 g÷253.8 g/mol =0.089 moles

Step 2:find the volume of I₂ at STP

At STP 1 moles =22.4 L

0.089 moles= ? L

by cross multiplication

={ (0.089 moles x 22.4 L) /1 mole} = 1.99 L

6 0

3 years ago

Why is it important to classify living things?

hammer [34]

it allows scientists to identify, group, and properly name organisms

5 0

3 years ago

Read 2 more answers

How does evolution work

sergey [27]

Billions of years ago, according to the theory of evolution, chemicals randomly organized themselves into a self-replicating molecule. This spark of life was the seed of every living thing we see today (as well as those we no longer see, like dinosaurs). That simplest life form, through the processes of mutation and natural selection, has been shaped into every living species on the planet.

4 0

3 years ago