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GarryVolchara [31]
3 years ago
15

Which part of modern atomic theory was first developed by John Dalton?

Chemistry
1 answer:
Nuetrik [128]3 years ago
3 0
C. one of the discoveries he made which gave him his fame in the scientific community was that the atom could not be destroyed
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In lab, a student observes an unknown substance dissolve in water and its mass remains the same. Which law is the student thinki
balu736 [363]

The law which this student is thinking of is the law of conservation of mass (LOCOM).

<h3>What is LOCOM?</h3>

LOCOM is an abbreviation for the law of conservation of mass and it states that mass is neither created nor destroyed in any chemical reaction.

This ultimately implies that, the mass of any substance in a balanced chemical equation or chemical reaction would remain the same at the end.

According to the law of conservation of mass (LOCOM), the mass of all the reacting chemical elements of any substance must be equal (remain the same) to the mass of the product formed during a chemical reaction.

Read more on LOCOM here: brainly.com/question/24783543

3 0
2 years ago
O. How many protons, neutrons and electrons are in Neodymium - 144 (Nd-144)?
TiliK225 [7]
Diagram of the nuclear composition, electron configuration, chemical data, and valence orbitals of an atom of neodymium-144 (atomic number: 60), an isotope of this element. The nucleus consists of 60 protons (red) and 84 neutrons (orange). 60 electrons (white) successively occupy available electron shells (rings).
8 0
3 years ago
Calculate the mass of water produced when 7.26 g of butane reacts with excess oxygen
MaRussiya [10]

Answer:

11.3 g.

Explanation:

Hello there!

In this case, since the combustion of butane is:

C_4H_{10}+\frac{13}{2} O_2\rightarrow 4CO_2+5H_2O

Thus, since there is a 1:5 mole ratio between butane and water, we obtain the following mass of water:

m_{H_2O}=7.26gC_4H_{10}*\frac{1molC_4H_{10}}{58.14gC_4H_{10}}*\frac{5molH_2O}{1molC_4H_{10}}  *\frac{18.02gH_2O}{1molH_2O}

Therefore, the resulting mass of water is:

m_{H_2O}=11.3gH_2O

Best regards!

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3 years ago
18.07 Lab Acid Neutralization 1
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Balance the following equation
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The answer would be D. Good luck my dude
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