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Marina86 [1]
2 years ago
9

Ipt Which of the following is true about semipermeable membranes?

Chemistry
1 answer:
mariarad [96]2 years ago
5 0
C is the correct answe
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How many moles are in 4.3 x 10 ^22 molecules of Na3PO4
Sever21 [200]

Answer:

0.071 moles of Na₃PO₄ .

Explanation:

Given data:

Number of molecules of Na₃PO₄ = 4.3× 10²² molecules

Number of moles = ?

Solution:

1 mole contain 6.022 × 10²³ molecules

4.3× 10²² molecules × 1 mol / 6.022 × 10²³ molecules

0.71× 10⁻¹ mol

0.071 mol

The number 6.022 × 10²³ is called Avogadro number.

"It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance"

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3 years ago
Which of the following statements describes the incorrect arrow movement
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3 years ago
Where are people mostly exposed to chemicals?
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Answer:

people are mostly exposed to chemicals through their nose, mouth, eyes, and ears

Explanation:

they are the easiest way for anything, bad or good, to enter the body because  people touch their face alot.

This might not answer what you were looking for but the other answer covered it pretty well so I thought I'd give you another angle to the question!

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4 0
2 years ago
A) Two ways to create a positive ion:
nirvana33 [79]

Positive ions are formed by atoms or molecules suffering an inelastic collision with an energetic electron in which an electron is lost from the atom or molecule (electron impact ionization). The degree of ionization of the plasma depends strongly on the electron density and energy distribution in the gas.

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What are 3 characteristics of cnidarians?
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Tentacles with stinging cells, 2 body layers (ectoderm & endoderm), radially symmetric
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