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3 years ago

7

Dalton’s atomic theory stated that every element was made of atoms that could not be subdivided, atoms of the same element are a

like, and

1 answer:

Pepsi [2]3 years ago

6 0

He said they're like hard balls that can't be split

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a compound is decomposed In the laboratory and produces 1.40 g N and 0.20g H what is the empirical formula

Bumek [7]

First, find the number of moles for each element. The molar mass for nitrogen is 14 g/mol and that of hydrogen is 1 g/mol.

1.40 g N / 14 g/mol = 0.1 mol N

0.20 g H / 1 g/mol = 0.2 mol H

Find the mole ratio. Divide both numbers with the much lower value. In this case, it is 0.1 mol N.

For N: 0.1 ÷ 0.1 = 1

For H: 0.2÷0.1 = 2

Thus, the empirical formula is $NH_{2}$ .

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3 years ago

Deuterium is an isotope of hydrogen (H) that has:

Ghella [55]

Answer:

D2 has 1 neutron

and 1 proton

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3 years ago

Why does a plant have a cell wall and a cell membrane?<br>ASAP Pls have to turn it in at 11:00pm

Aleonysh [2.5K]

Answer:

The cell wall surrounds the plasma membrane and provides the cell tensile strength and protection. ... The cell wall surrounds the plasma membrane of plant cells and provides tensile strength and protection against mechanical and osmotic stress.

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3 years ago

What defines the mass number of an isotope?

geniusboy [140]

Answer:

a

Explanation:

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2 years ago

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Which element has the lowest mass per nuclear particle and therefore cannot release energy by either fusion or fission?

klemol [59]

The element that has the lowest mass per nuclear particle and therefore cannot release energy by either fusion or fission is the element Fe or iron. Iron is referred to as a special element due to its nuclear binding energy. A general idea is that you can have nuclear fusion of two elements and get a heavier element only up to the element iron in the periodic table of elements and also you can only have fusion reactions starting from the element next to iron. This is due to the nuclear forces and the electromagnetic force being balanced for the element iron.

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3 years ago