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Mrac [35]
3 years ago
7

Which two human activities are believed to be the greatest contributors to global warming?

Chemistry
2 answers:
vivado [14]3 years ago
7 0
B. Deforestation and burning of fossil fuels. <span />
NeTakaya3 years ago
5 0

Answer: B. deforestation and the burning of fossil fuels.

Explanation:

Global warming is a phenomena of rise in global temperatures due to certain human activities and natural processes like volcanic eruption.

The burning of fossil fuels and deforestation are the examples of human activities which contribute to global warming. These two activities increase the abundance of greenhouse gases like methane, carbon monoxide, carbon dioxide, nitrous oxides, sulphur oxides in the atmosphere. These gases trap the heat energy from sunlight and increase the temperature of the atmosphere. Hence, are responsible for global warming.

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How to separate crystals from solution​
tatiyna

Answer:

If a saturated hot solution is allowed to cool, the solute is no longer soluble in the solvent and forms crystals of pure compound. Impurities are excluded from the growing crystals and the pure solid crystals can be separated from the dissolved impurities by filtration.

6 0
2 years ago
Give an example of one type of energy conversion (change to another form). Be sure to explain your example.
Daniel [21]
Potential to Kinetic Energy. 
When you a basketball in your hand that is potential energy. Then, when you bounce the ball that is kinetic energy. 
3 0
3 years ago
A gas fills up a container that has 2.5L has a pressure of 3.5 atm. If the gas gets transferred to a container that holds 4L, wh
disa [49]
New pressure = 2.5 x 3.5 / 4 = 2.185 atm
7 0
3 years ago
A bowl of trail mix an da bowl of soup are examples of what type of matter?
melamori03 [73]
The answer would be heterogeneous 
3 0
3 years ago
La is element 57 on the periodic table a sample contains 2.82 * 10€25 power atoms of La calculate the amount of LA
vodka [1.7K]

Answer:

n=46.8molLa\\\\m=6.50x10^3gLa

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to calculate both moles and grams of lanthanum by using the Avogadro's number as a relationship of atoms to moles and its atomic mass as a relationship to moles to grams to obtain the following:

n=2.82x10^{25}atomsLa*\frac{1molLa}{6.022x10^{23}atomsLa}=46.8molLa\\\\m=46.8molLa*\frac{138.9gLa}{1molLa}  =6.50x10^3gLa

Regards!

5 0
3 years ago
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