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Eddi Din [679]
3 years ago
14

What is name of each shape​

Chemistry
1 answer:
dimulka [17.4K]3 years ago
4 0

Answer:

I am so sorry I do not know this

Explanation:

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<span>D. encloses specific structures</span>
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3 years ago
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Calculate the number of atoms in 5 moles H₂O.
oksano4ka [1.4K]

Answer:

90.35 × 10²³ atoms

Solution:

1 molecules of H20 contains 3 atoms,.

And we know that one mole of any molecule contains 6.023 × 10²³ atoms from Avogadro's number,

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<em><u>Thanks for joining brainly community!</u></em>

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2 years ago
Radium-221 has a half-life of 30 sec. How long will it take for 96% of a sample to decay?
monitta
We can calculate how long the decay by using the half-life equation. It is expressed as:

A = Ao e^-kt

<span>where A is the amount left at t years, Ao is the initial concentration, and k is a constant.
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1/2(Ao) = Ao e^-k(30)
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3 years ago
In order to have a contact force acting on an object, the force
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I believe the answer is C. (must be touching the object)

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3 years ago
Chemists use letters of the alphabet as ____ for the elements.
d1i1m1o1n [39]

Answer:

The symbol is the right answer.

Explanation:

The “ Symbol” is the correct answer because chemist uses the letters of the alphabet to denote the element. For instance, the element oxygen is denoted by the letter of the alphabet “O”, the hydrogen is denoted by the letter of alphabet “H”, Boron is denoted by the letter of alphabet “B”, etc. Here these are the examples that use one letter but there are other elements that use more than 1 letter as the symbol. For example, the Chlorine is represented by the Cl.

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3 years ago
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