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3 years ago

Why is unit of pressure called a derived unit ?? 2) how do you measure the volume of milk?

Chemistry

1 answer:

trasher [3.6K]3 years ago

4 0

1. Unit of pressure called a derived unit because it is a combination of base units (kg·m^-1·s^·2).

2. We measure the volume of milk by a instrument called Milk Lactometer.

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The pressure of a gas is 275 mm hg when it is confined in a 2.50 L container. What would be the volume of the gas if the pressur

pochemuha

In this problem we will apply Boyle's Law. According to this law, there is a inverse relation between volume and pressure. As the presseure is being increased in this problem so the volume should be less than the initial volume. Solution is as follow,

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3 years ago

How many grams of sulfur (S8S8) must be dissolved in 100.0 g naphthalene (C10H8C10H8) to make a 0.11 mm solution

Rainbow [258]

Answer:

5.64x10⁻³ g of S₈S₈

Explanation:

We consider mm as milimolal

Milimolal = molal . 1000

Molal are the moles of solute contained in 1kg of solvent.

Solute → Sulfur (S₈S₈)

Solvent → naphthalene

0.11 mm / 1000 = 1.1x10⁻⁴ molal

moles of solute / kg of solvent = 1.1x10⁻⁴ molal

moles of solute / 0.1 kg of solvent = 1.1x10⁻⁴ molal

moles of solute = 1.1x10⁻⁴ m/kg . 0.1kg → 1.1ₓ10⁻⁵ moles

Molar mass S₈S₈ = 512.96 g/m

1.1ₓ10⁻⁵ mol . 512.96 g/m = 5.64x10⁻³ g

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3 years ago

Write a balanced chemical equation for the incomplete combustion of gaseous ethane (C2H6). What is the sum of the coefficients i

Delicious77 [7]

Answer:

C2H6 +02 ===>Co2 + H20.

Explanation:

7 0

3 years ago

27.2 kg of a solution containing 18.7 % KCl by mass

zheka24 [161]

The amount of potassium chloride (KCl) in 27.2 kg of a solution containing 18.7% KCl by mass solution is 5.086 kg.

<h3>How to find the mass of solute ? </h3>

Mass of solute = Mass percent of solute x Mass of the solution

Here,

Mass percent of solute = 18.7 %

Mass of the solution = 27.2 kg

Now put the value in above formula we get

Mass of solute = Mass percent of solute x Mass of the solution

= $\frac{18.7}{100} \times 27.2\ kg$

= $\frac{508.64}{100}$

= 5.086

Thus from the above conclusion we can say that The amount of potassium chloride (KCl) in 27.2 kg of a solution containing 18.7% KCl by mass solution is 5.086 kg.

Learn more about the Mass Percent here: brainly.com/question/26150306

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5 0

2 years ago

Suppose a current of flows through a copper wire for seconds. Calculate how many moles of electrons travel through the wire. Be

vagabundo [1.1K]

Answer:

1.20 × 10⁻³ mol e⁻

Explanation:

There is some info missing. I think this is the original question.

<em>Suppose a current of 0.880 A flows through a copper wire for 132 seconds. Calculate how many moles of electrons travel through the wire. Be sure your answer has the correct unit symbol and round your answer to significant digits.</em>

<em />

Step 1: Given data

Intensity of the current (I): 0.880 A (= 0.880 C/s)

Time elapsed (t): 132 s

Step 2: Calculate the charge, in Coulomb, that travel through the wire

We will find the circulating charge (q) using the following expression.

$q = I \times t = \frac{0.880C}{s} \times 132s = 116C$

Step 3: Calculate the moles of electrons with a charge of 116 C

We will use the relationship 1 mole of electrons = 96,486 C (<em>Faraday's constant</em>)

$116C \times \frac{1mol\ e^{-} }{96,486 C} =1.20 \times 10^{-3} mol\ e^{-}$

6 0

3 years ago

Why is unit of pressure called a derived unit ?? 2) how do you measure the volume of milk?​

Why is unit of pressure called a derived unit ?? 2) how do you measure the volume of milk?