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Anton [14]
3 years ago
11

What describes the current model of an atom​

Chemistry
1 answer:
vladimir2022 [97]3 years ago
8 0

Answer:

A tiny sense positively charge core called a nucleus in which nearly all the mass is concentratedm

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Identify the property of the substance that is changing. A. composition B. volume C. boiling point
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Property of Volume changes.

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Which element does this Bohr model represent? (look at a periodic table if needed)
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Circulating round the nucleus are the electrons in various orbits of different energy levels. Electrons are negatively charged and represented by the symbol 'e'. In the given image the number of protons are -6. Hence the element in question is Carbon as Carbon has the atomic number 6.
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Water and carbon dioxide are both made of 3 atoms<br> True or false
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3 years ago
Which of the following is NOT an example of a fossil fuel?
Serhud [2]
Methanol is not an example of a fossil fuel.
5 0
3 years ago
Calculate the molality of a 5.73 M ethanol (C2H5OH) solution whose density is 0.9327 g/mL.
Natalka [10]

Answer:

Molality = 8.57 m

Explanation:

Given data:

Molarity of solution = 5.73 M

density = 0.9327 g/mL

Molality of solution = ?

Solution:

Molality = moles of solute / kg of solvent.

Kg of solvent:

Mass of 1 L solution = density× volume

Mass of 1 L solution = 0.9327 g/mL × 1000 mL

Mass of 1 L solution = 932.7 g

Mass of solute:

Mass of 1 L = number of moles  × molar mass

Mass = 5.73 mol  × 46.068 g/mol

Mass = 263.97 g

Mass of solvent:

Mass of solvent = mass of solution - mass of solute

Mass of solvent = 932.7 g - 263.97 g

Mass of solvent = 668.73 g

In Kg = 668.73 /1000 = 0.6687 Kg

Molality:

Molality = number of moles of solute / mass of solvent in Kg

Molality = 5.73 mol /  0.6687 Kg

Molality = 8.57 m

4 0
2 years ago
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