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Softa [21]
2 years ago
5

What is the oxidation state of chromium in k2cr2o7?.

Chemistry
1 answer:
sineoko [7]2 years ago
3 0

Answer:

+6

Explanation:

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Heat of fusion (?Hfus) is used for calculations involving a phase change between solid and liquid, with no temperature change. F
Butoxors [25]

Answer:

q = 38,5 kJ

Explanation:

In its melting point, at 0°C, water is liquid. The boiling point of water is 100°C. It is possible to estimate the heat you required to raise the temperature of water from 0°C to 100°C using:

q = C×m×ΔT

Where C is specific heat of water (4,184J/g°C), m is mass of water (92,0g) and ΔT is change in temperature (100°C-0°C = 100°C)

Replacing:

q = 4,184J/g°C×92,0g×100°C

q = 38493 J, in kilojoules:

<em>q = 38,5 kJ</em>

<em></em>

I hope it helps!

6 0
3 years ago
Write the molecular formula of sodium nitroprusside.​
saveliy_v [14]

Answer:

Explanation: Sodium Nitroprusside, whose molecular formula is  • 2H2O, and whose molecular weight is 297.95. Dry sodium nitroprusside is a reddish-brown powder, soluble in water.

5 0
2 years ago
Which of these is an accurate statement about scientific variables? A. They can be connected to one another. B. They are the sam
inna [77]

The correct option is A.

In scientific investigation, variable refers to those parameters that are manipulated or changed in an experiment. Variables are those factors or conditions that can exist in different amounts in a scientific investigation. There are three major types of experimental variables, these are, independent, dependent and controlled variables. All the variables that are used in an experiment are usually connected to one another, scientific investigators typically look for the relationships among the variables in order to depict how they associate with one another.

3 0
3 years ago
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What is embedded in the phospholipid bilayer and forms the channels and pumps to help molecules pass through the cell membrane
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semen

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Describe the processes that likely led to the formation of the rock and the canyon wall?
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The specific geologic processes and timing that formed the Grand Canyon spark lively debates by geologists. The general scientific consensus, updated at a 2010 conference, holds that the Colorado River carved the Grand Canyon beginning 5 million to 6 million years ago.

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3 years ago
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