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2 years ago

I'm a bit stupid, that's why I'm going to ask for help, can you be nice and help me? Thank you

Chemistry

2 answers:

ki77a [65]2 years ago

6 0

1. Ion
2. Valence electron
3. Isotopes
4.Covalent
5. ionic

tangare [24]2 years ago

3 0

Explanation:

ion

valence electrons

isotope

covalence

ionic

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Suppose that a certain fortunate person has a net worth of $77.0 billion ($). If her stock has a good year and gains $3.20 billi

marissa [1.9K]

Answer:

New net worth to three significant figures = $80.2 billion

Dollars are given to charity = $100,250,000

Explanation:

Net worth = $77.0 billion

stock Gains = $3.20 billion

New net worth = $77.0 billion + $3.20 billion = $80.20 billion

New net worth to three significant figures = $80.2 billion

One-eighth of a percent = (1/8 x 1) / 100 = 0.00125

Dollars are given to charity = 0.00125 X $80.2 billion = $100,250,000

$80,200,000,000/100 = $802,000,000

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3 years ago

If I have 2 mol NaOH in 3 L of solution, what is the molarity of my solution?

qwelly [4]

Answer:

0.67 mole/litre

Explanation:

the molarity equall no. of moles ÷ volume of sol.

3 0

2 years ago

The chemical formula for water, h2o, means that each water molecule contains

DanielleElmas [232]

B - two hydrogen atoms and one oxygen atom

6 0

3 years ago

Read 2 more answers

A sample of 19 mg of 9-fluorenone is dissolved in 5 mL of diethyl ether. The resulting organic

maks197457 [2]

Answer:

15.70mg would remain

Explanation:

Partition coefficient is used to extract or purify a solute from a solvent selectively to avoid interference from other substances. For the problem, formula is:

Kp = Concentration 9-fluorenone in ether / Concentration of solute in H₂O

After the solute, 9-fluorenone, is extracted with water, the mass that remains in ether is:

(19mg - X)

<em>Where X is the mass that now is in the aqueous phase</em>

Replacing in Kp formula:

9.5 = (19mg - X) / 5mL / (X /10mL)

0.95X = 19mg - X / 5mL

4.75X = 19 - X

5.75X = 19

X = 19 / 5.75

X = 3.30mg

That means 9-fluorenone that remain in the ether layer is:

19mg - 3.30mg =

<h3>15.70mg would remain</h3>

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3 years ago

ANSWERS NEEDED ASAP

Artemon [7]

1 and 2 the forces holding water molecules together are stronger than the forces holding alcohols molecules together these forces are stronger in water due to hydrogen bonding the intermolecular forces forces that hold the water together are stronger than alchol because water has hydrogen bonding hydrogen bonding is hydrogen being attracted to oxygen or flourine or chloroine the electronegativity differences are larger the forces holding the bonds are stronger its like hydrogen is holding on to oxygen strongly different types of forces are lomdon dispersion forces like helium which have low boiling point they have nothing holding them together water has hydrogen bonds alcohol doesnt have the hydrogen bonds water has and geometry vsper model polar and hydrogen bonds as water so theyre weaker.

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3 years ago