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d1i1m1o1n [39]
3 years ago
9

How much 1.50M KBr can be made from 15.6 mL of concentrated KBr with a molarity of 9.65 M?

Chemistry
1 answer:
sasho [114]3 years ago
8 0

Answer: 234.8 M

Explanation:

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When studying atoms, scientists can ignore the
vekshin1

When studying atoms, scientists can ignore <u>the Gravitational</u> force between charged particles that make up  the atoms because it is many millions of times smaller than other forces in the atom.

Explanation:

Scientists can ignore the gravitational force because the gravitational force is considered to be negligible as compared to the other forces due to its smaller value.We all know that the gravitational force is directly proportional to the mass of an object which  result in  a small force value.When the value of this small force is compared to the value of the electrical force between protons and electrons in atoms the we can say that the electrical force is million times stronger than the gravitational force

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3 years ago
11.<br> The electron configuration for phosphorous is [Ar]3s23p4.<br> TRUE<br> FALSE
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Answer:

False

Explanation:

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2 years ago
How does the temperature of absolute zero relate to the kinetic energy of a substance's molecules?
skelet666 [1.2K]

Answer:

I will say D. The molecules become arranged into regular cubic arrangement. but i'm not 100% sure

Explanation:

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Which of the following are not single-displacement reactions?
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Answer:

\boxed{\text{B and C }}

Explanation:

In a single-displacement reaction, one element exchanges partners with another element in a compound.

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\textbf{B. } \rm KOH + HNO_3 \longrightarrow H_2O + KNO_3

This is not a single-displacement reaction, because it is a reaction between two compounds.

This is a double displacement reaction in which the K⁺ and H⁺ cations change partners with the anions.

\textbf{C. } \rm Na_2S + 2HCl \longrightarrow 2NaCl + H_2S

This is not a single-displacement reaction. It is another double displacement reaction, in which the Na⁺ and H⁺ cations change partners with the anions.

\textbf{D. } \rm Ca + 2HOH \longrightarrow Ca(OH)_2 + H_2

This is a single-displacement reaction, because the element Ca exchanges partners with H in H₂O.

\boxed{\textbf{B and C }} are not single-displacement reactions.

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3 years ago
How does botulinum toxin block synaptic transmission?
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It blocks ACh release so the muscle cannot contract

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