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mixas84 [53]
3 years ago
6

Who was the first scientist to develop a theory of the atom

Chemistry
2 answers:
Olegator [25]3 years ago
8 0

Democritus, a Greek philosopher.

PIT_PIT [208]3 years ago
5 0

Democritus if you want the VERY first. Whereas John Dalton proposed the idea of the atomic theory. :)

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cheryl has $56 and wants to buy as many notebooks as she can to donate to her school. if each notebook costs $1.60, which inequa
postnew [5]
Amount of money that Cheryl has = $56
Cost of each notebook = $1.60
The maximum number of notebooks she can buy = n
Then

n = 56/1.6 

is the inequality that shows the maximum number of notebooks she can buy with her money

On solving the inequality, we get
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6 0
3 years ago
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How many molecules are in 4.50 moles of H2O?
alisha [4.7K]
C can be the only correct answer - 6.023 x 10^23 is the amount of molecules in a mol of an element. 4.5 x 6.023 x 10^23 can not equal anything but C.

4.5 x 6.023 x 10^23 = 2.71035 x 10^24
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In the Bronsted-Lowry model of acids and bases, an _____ is a hydrogen donor and a _____ is a hydrogen acceptor.
Natasha_Volkova [10]

Answer:

According to Bronsted-lowry concept  an acid is a hydrogen donnor and a base is a hydrogen acceptor.

Explanation:

4 0
3 years ago
12
VARVARA [1.3K]

Answer:

B

Explanation:

the number of protons never changes even if the atomic mass changes

5 0
3 years ago
3. At 10.0°C and 2.00 atm, the volume of the gas is 75.0 mL. If the temperature of the gas increases to
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Explanation:

c.

from \\  \frac{P _{1} V _{1} }{T _{1}}  =  \frac{P _{2} V _{2}}{T _{2}} \\ \frac{2 \times 75}{(10+273)}  =  \frac{V _{2} \times 1}{(35+273)}  \\V _{2} =  \frac{2 \times 75 \times (35+273)}{(10+273) \times 1}   \\ V _{2} = 163 \: ml

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