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lbvjy [14]
3 years ago
8

What is the total number of neutrons in the nucleus of a neutral atom that has 19 electrons and a mass of 39?

Chemistry
1 answer:
JulsSmile [24]3 years ago
3 0
20 because
mass no=electrons+neutrons
so to find neutrons
mass no-electrons=neutron
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In your own words, please describe the difference between a complete ionic equation and a net ionic equation.
beks73 [17]

Explanation:

In the molecular equation for a reaction, all of the reactants and products are represented as neutral molecules (even soluble ionic compounds and strong acids). In the complete ionic equation, soluble ionic compounds and strong acids are rewritten as dissociated ions.

The net ionic equation is a chemical equation for a reaction that lists only those species participating in the reaction. The net ionic equation is commonly used in acid-base neutralization reactions, double displacement reactions, and redox reactions.

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3 years ago
Why is ice cream a mixture
kvasek [131]

Ice is a mixture and it can be a compound at the same time. A mixture is when you have to substance's put together fro example you can mix salt and sugar together. But a compound is when two different elements or molecules are combined. Ice cream is a mixture or cream and sugar mainly.
7 0
3 years ago
Read 2 more answers
2 points
Drupady [299]

Answer: The ratio of carbon to bromine atoms  in the molecule is 3:1

Explanation:

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Where was the first permanent European settlement in what is now the United States?
siniylev [52]

Answer:

Jamestown, Virginia

Explanation:

6 0
2 years ago
Consider the following reaction: SO2Cl2(g)⇌SO2(g)+Cl2(g) A reaction mixture is made containing an initial [SO2Cl2] of 2.2×10−2M
Andrej [43]
The value of equilibrium constant is equal to the quotient of the products raised to its stoichiometric coefficient over the reaction's reactants raised to its respective stoichiometric coeff. The equation is Kc=[SO2][Cl2]/[SO2Cl2]= [1.3*10^-2][1.3*10^-2]/[2.2*10^-2-<span>1.3*10^-2]=0.0188. The final answer is Kc=0.0188.</span>
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3 years ago
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