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Pie
3 years ago
15

What is an isotope ? how is the mass calculated ?

Chemistry
1 answer:
leonid [27]3 years ago
8 0

Answer:

Isotopes are variants of a particular chemical element which differ in neutron number, and consequently in nucleon number. All isotopes of a given element have the same number of protons but different numbers of neutrons in each atom

Explanation:

For any given isotope, the sum of the numbers of protons and neutrons in the nucleus is called the mass number. This is because each proton and each neutron weigh one atomic mass unit (amu). By adding together the number of protons and neutrons and multiplying by 1 amu, you can calculate the mass of the atom

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Inessa [10]

Answer:

They expressed it as rate of change in concentration of reactants or products in a chemical reaction

6 0
3 years ago
Read 2 more answers
Help me please!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
sesenic [268]
2nd one is the awnser
6 0
2 years ago
Acetone is the main chemical in nail polish and has a density of 0.7857 g/mL. What is the volume of 6.54g of acetone ?
trapecia [35]

8.3mL

Explanation:

Given parameters:

Mass of acetone = 6.54g

Density of acetone = 0.7857 g/mL

Unknown:

Volume of acetone = ?

Solution:

Density is defined as the mass per unit volume of a substance. It is expressed mathematically as shown below:

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Since the unknown is volume, we make it the subject of the formula

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Input the values;

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learn more:

Volume brainly.com/question/2690299

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5 0
3 years ago
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juin [17]
Your answer should be C.) +2. "All the elements in Group 2 have two electrons in their valence shells, giving them an oxidation state of +2." 


Credits: https://chem.libretexts.org/Core/Inorganic_Chemistry/Descriptive_Chemistry/Elements_Organized_by_Blo...

Hopefully this has helped! :)
5 0
3 years ago
Indicate which factors affect the rate of a reaction. select all that apply. temperature δs o keq δg o δh o ea concentration k c
melamori03 [73]
Several factors affect the rate of a chemical reaction. From the options given factors that affect the rate are:
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As the temperature increases, also the rate of the reaction increases.
<span>The concentration of a catalysts helps a reaction to proceed more quickly to equilibrium. </span>
5 0
3 years ago
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