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choli [55]
4 years ago
5

A voltaic cell differs from an electrolytic cell in that a chemical cell uses

Chemistry
1 answer:
oksian1 [2.3K]4 years ago
7 0

Answer:

3) an applied electric current

Explanation:

An electric source is used in an electrolytic cell.

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EASY QUESTION PLEASE HELP I JUST NEED REASURANCE Is mass conserved when you fry an egg and it undergos a chemical change?
Andrew [12]

Answer:

Yeah chemical change occurs when you fry an egg since the whites harden and change shape in a way. Mass is conserved since it doesn't change.

8 0
2 years ago
A dextrose/saline aqueaout solution doctors commonly use to replace fluids in the body contains 1.75g/L NaCl and 40.0g/L dextros
qwelly [4]

<em>Mixed molarity = 0.25 M</em>

<em>Osmotic pressure solution: 6.15 atm</em>

<h3><em>Further explanation</em></h3>

Osmotic pressure is the minimum pressure given to the solution so that there is no osmotic displacement from a more dilute solution to a more concentrated solution.

General formula:

\large{\boxed {\bold {\pi \: = \: M \: x \: R \: x \: T}}}

π = osmotic pressure (atm)

M = solution concentration (mol / l)

R = constant = 0.08205 L atm mol-1 K-1

T = Temperature (Kelvin)

Mixing solution

To find the molarity of the mixed solution we can use the following formula:

Vc. Mc = V1.M1 + V2.M2

where

Mc =Mixed molarity

Vc = mixed volume

Mr. NaCl = 58.5

Mr. Dextrose = C₆H₁₂O₆ = 180

mole NaCl = gram / Mr

mole NaCl = 1.75 / 58.5 = 0.03

Dextrose mole = 40/180 = 0.22

Assuming 1 liter of solution

M mixture = mole NaCl + mole dextrose / 1 liter

M mixture = 0.03 + 0.22 / 1 L

M mix = 0.25 M

T = 25 + 273 = 298 K

The osmosis pressure of the solution becomes:

π = 0.25. 0.0825. 298 = 6.15 atm

<h3><em>Learn more</em></h3>

The osmotic pressure brainly.com/question/8195553

<h3><em>Answer details </em></h3>

Grade: Senior High School

Subject: Chemistry

Chapter: Colligative property

Keywords: osmotic pressure, molarity, mole,dextrose, NaCl

7 0
3 years ago
2K3N +3CaCrO4 → Ca3N2 + 3K,CrO
Arada [10]

Answer:

1. 3CaCrO4

2. 6

3. 3

Explanation:

1. Reactans on left side, products on right side

2. 3 x 2

3. 3

7 0
4 years ago
Why do gases diffuse more quickly than liquids?
Alborosie

Answer:

D)Gas particles move rapidly and have space between them.

Explanation:

Matter exists in three states namely: solids, liquids and gases. The particles contained in these three states are different from one another. In the gaseous state, the particles are FAR APART from one another i.e. space exists and they move at a very fast rate in contrast to the particles of a liquid, which have less space and move slower.

This rapid movement of gas particles within a less restricted space accounts for the reason why gaseous substances DIFFUSE more quickly than liquids.

5 0
3 years ago
How many grams of gasoline would you need to burn to move your car 2.5 miles which takes 5,375 kJ? (Hrxn= 47kJ/g)
docker41 [41]

Answer:

1.1 × 10² g

Explanation:

The combustion of gasoline releases energy that is used to move the car. The enthalpy of reaction (ΔH°rxn) of the combustion of gasoline is 47 kJ/g, that is, 47 kiloJoule are produced per gram of gasoline burned. The mass of gasoline to be burned to release 5,375 kJ is:

5,375 kJ × 1 g Gasoline/47 kJ = 1.1 × 10² g

4 0
3 years ago
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