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lisov135 [29]
3 years ago
5

Who was the first to propose the existence of atoms?

Chemistry
2 answers:
sergiy2304 [10]3 years ago
4 0
The British physicist J. J. Thomson and Rutherford were the first to propose the existence of atoms.
Ainat [17]3 years ago
3 0
Democritus <span>was the first to propose the existence of atoms ...</span>
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What is the main cause of increased erosion
anyanavicka [17]
The main cause of increased erosion is natural elements like rain, wind and ice. Erosion is the process by which the surface of the Earth gets worn down. 
Soil erosion is also a big thing, it is caused by mostly rain that contributes to floods. This stuff is bad for farmers because they do a lot of farming and with erosion increasing the growing crops are decreasing because of erosion. 
6 0
3 years ago
Getting empirical formula, but they also gave molar mass too.
-Dominant- [34]

Answer:

Empirical formula is PNCl₂

Explanation:

Percent composition means that 100 g of compound has x g of each element.

In 100 g of compound x, we have 26.73 g of P, 12.09 g of N, 61.18 g of Cl.

So, let's make some rules of three:

In 100 g of compound we have 26.73 g of P, 12.09 g of N, 61.18 g of Cl

In 579.43 g of compound we have:

(579.43 . 26.73) / 100 = 155 g of P

(579.43 . 12.09) / 100 = 70 g of N

(579.43 . 61.18) / 100 = 354 g of Cl

Let's convert the mass of the elements in moles.

155 g of P / 30.97 g/mol = 5 P

70 g / 14 g/mol = 5 N

354 g / 35.45 g/mol = 10 Cl

7 0
3 years ago
Read 2 more answers
Distinguish between climate and atmosphere.
nignag [31]
What are you talking about and what’s the question
6 0
3 years ago
What is the mass of 3.01x1023 atoms of iron(atomic mass of fe=56)
nlexa [21]

Answer:

N = n× l

N = number of entities

n= moles

l = Avogadro's constant = 6.023 × 10^23

3.01 × 10^ 23 = n * 6.023 × 10^23

n = 3.01 × 10^23/6.023 × 10^23

n= 0.5moles

Molar mass = mass/ number of moles

Molar mass = 56

mass = 56 × 0.5

= 28g

Hope this helps.

4 0
4 years ago
If you doubled the volume of a sample of gas and
Dimas [21]

Answer:

1125mL

Explanation:

this can be done using general gas law

3 0
3 years ago
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