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Gennadij [26K]
4 years ago
10

Please help me in this one also <33!

Chemistry
1 answer:
muminat4 years ago
4 0
The right answers are A) and B).
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How many OWLS are 4 desks?
zhannawk [14.2K]

Answer:

8

Explanation:

becus it just how that is ok kidhdod

5 0
2 years ago
If 44.7 g of KCI (MM = 74.55 g/mol) are added to a 500.0 mL volumetric flask, and water is added to fill the flask, what is the
navik [9.2K]

1.199 M is the concentration of KCI in the resulting solution.

<h3 /><h3>What are moles?</h3>

A mole is defined as 6.02214076 × 10^{23} of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.

No.of moles of KCI

Moles = \frac{mass}{molar \;mass}

Moles = \frac{44.7 g}{74.5513 g/mol}

= 0.599 moles

Vol.of the solution,V= 500 ml

= 0.5 liter

Molarity

Molality = \frac{Moles \;solute}{Volume \;of \;solution \;in \;litre}

Molality = \frac{0.599 moles}{0.5 liter}

= 1.199 M

Hence, 1.199 M is the concentration of KCI in the resulting solution.

Learn more about moles here:

brainly.com/question/8455949

#SPJ1

6 0
2 years ago
A student makes a mistake while preparing a vitamin C sample for titration and adds the potassium iodide solution twice. How wil
LiRa [457]

The added KI does not have any impact  

The reaction invovles Titration of vitaminc ( Ascorbic acid)

ascorbic acid + I₂ → 2 I⁻  +  dehydroascorbic acid

the excess iodine is free reacts with the starch  indicator, forming the blue-black starch-iodine complex.  

This is the endpoint of the titration. since alreay excess KI is added ( the source of Iodine), it does not have an influence.

Answer B

Hope this helps!

5 0
4 years ago
If a half life is 2.5 hours, how long is 2 half life's
hram777 [196]

Answer:

Im not really sure what a half life is, but two of them would be 5.0 hours

4 0
3 years ago
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What must you determine first when solving a word rproblem?
SashulF [63]
Words that includes names, places, geometric shapes and finally units of measure.
 
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