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2 years ago

PLEASE PEOPLE I NEED HELP PLEASE IF YOU SEE THIS HELP ME ! :,(

Chemistry

1 answer:

mr Goodwill [35]2 years ago

8 0

Answer: 5.5 7.5 102

Explanation: using the equation above you can get these %s

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Why should you always condition a buret before running a titration?.

Alex Ar [27]

Answer:

Conditioning two or three times will insure that the concentration of titrant is not changed by a stray drop of water.

Explanation:

"Check the tip of the buret for an air bubble. To remove an air bubble, whack the side of the buret tip while solution is flowing".

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3 years ago

The elements in group 7a are known by what name? transition metals halogens alkali metals alkaline earth metals noble gases

Rudiy27

Halogens are in group 7!!!!!!

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4 years ago

A dunk tank hold 30,533 moles of water? How many grams of water are in the tank?

liubo4ka [24]

The mass of water in the tank, given the data from the question is 549594 g

<h3> Description of mole </h3>

The mole of a substance is related to it's mass and molar mass according to the following equation:

Mole = mass / molar mass

<h3>How to determine the mass of water in the tank</h3>

From the question given above, the following data were obtained:

Mole of water = 30533 moles
Molar mass of water = 18 g/mol
Mass of water = ?

The mass of the water can be obtained as follow:

Mass = mole × molar mass

Mass of water = 30533 × 18

Mass of water = 549594 g

Learn more about mole:

brainly.com/question/13314627

#SPJ1

3 0

2 years ago

Plz help I need help fast

CaHeK987 [17]

Answer: The correct answer is A. Molality. It is the concentration expressed as moles of solute per kilogram solvent. It is most commonly used in solving problems involving Colligative Properties (e.g. boiling point elevation, freezing point depression). Other ways to express concentration are Molarity, Mole Fraction, Parts per Million, Parts per Billion, and Normality.

Further Explanation

B. Mole Fraction is the ratio of the moles of a solute to the total moles of the solution. This unit of concentration is expressed as:

$mole\ fraction \ of \ x = \frac{moles \ of \ solute \ x}{total\ moles \ of \ solution}$

C. Molarity is the most common ways of expressing concentration. It is the amount of solute per liter of solution and is expressed as:

$Molarity\ (M) \ = \frac{moles \ of \ solute}{liter \ of \ solutiont}$

D. ppm (or parts per million) is used for very dilute solutions. It is expressed as the mass of solute in milligrams per liter of the solution:

$parts\ per \ million \ (ppm) = \frac{mass\ of \ solute \ (in\ mg)}{liter\ of\ solution}$

Learn more

1. Learn more about Molarity brainly.com/question/9183916

2. Learn more about Colligative Properties brainly.com/question/1257312

3. Learn more about Solution brainly.com/question/7932885

Keywords: molarity, molality, mole fraction, parts per million

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3 years ago

A new potential heart medicine, code-named X-281, is being tested by a pharmaceutical company, Pharma-pill. As a research techni

pshichka [43]

Hope this helps! Let me know if you have any questions.

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3 years ago