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aliya0001 [1]
2 years ago
10

The way it can be determined which type of atom we have is to figure out____are contained within the nucleus of the atom A.elect

rons. B.protons. C.neutrons. D.positrons (Choose all that apply)
Chemistry
1 answer:
Dima020 [189]2 years ago
6 0

protons and neutrons are in the nucleus electrons surround the atom and i have no idea what positrons are i just know they arent in an atom so your answer is B and C

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The chemical formula for ethanol is C2H601.How many total atoms are in 30 molecules of ethanol?
12345 [234]
There are two carbon atoms in every ethanol molecule, so there would be 60 carbons all together.

I hope this helped you!
3 0
3 years ago
Calculate the concentration of hydrogen ions in a healthy person’s blood that has a pH of 6.40.
adoni [48]

Answer:

[H⁺] = 3.98×10⁻⁷ M

Explanation:

Given data:

pH of blood = 6.40

Hydrogen ion concentration = ?

Solution:

Formula:

pH = - log[H⁺]

by rearranging this formula,

[H⁺] =  10⁻(pH)

By putting values,

[H⁺] = 10 ⁻⁶°⁴⁰

[H⁺] = 3.98×10⁻⁷ M

4 0
3 years ago
The reactants of two chemical equations are listed. Equation 1: PbNO3 + Mg Equation 2: PbNO3 + KI Based on the type of reaction,
Vika [28.1K]

Answer:

Equation 2, because K being more reactive, exchanges position with Pb in PbNO3.

Explanation:

Hello there!

In this case, according to the given reactions, it is possible to realize that according to the reactivity series, since K is is group 1A of alkali metals, we infer it is by far more reactive than magnesium, for that reason last two choices can be easily discarded. Now, considering equation 2, it would be necessary to complete it to figure out the correct option:

Pb(NO_3)_2 + KI \rightarrow PbI_2+KNO_3

Whereas it can be seen that potassium exchanges position with Pb according to the double displacement reaction; therefore, the correct answer is "Equation 2, because K being more reactive, exchanges position with Pb in PbNO3".

Best regards!

8 0
3 years ago
Answer quickly plzzzz 100 points
Paladinen [302]

Answer:

hydrogen  and oxygen

Explanation:

6 0
3 years ago
Read 2 more answers
A single atom of gold can be what?
dmitriy555 [2]
A molecule is usually reserved to represent the smallest particle of a compound.    
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3 years ago
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