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Yanka [14]
4 years ago
8

Describes how Anders Celsius devised the temperature scale that bears his name

Chemistry
1 answer:
shusha [124]4 years ago
3 0
He used a tube of mercury and marked the height of the mercury when placed in an ice bath as 0 degrees celsius, when he placed the tube in a boiling, he marked the height of mercury and called that 100 degrees celsius, he marked it linearly between 0-100 degrees celsius
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Which statement describes the feeling interactions between frogs and insects? Select all that apply.
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3 years ago
Chemistry problem, just need an explanation to why this is the answer
ICE Princess25 [194]

Answer:

Filtration

Explanation:

Evaporation could work, but it would take too long and might be harmful to the environment.  This is not the answer.

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Filtration is where you would pour the liquid through a filter and collect the solid.  This is the answer.

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6 0
3 years ago
The density of helium in a balloon is 1.18 g/L. If a
marissa [1.9K]
There is 3.58 He in the balloon.
3 0
3 years ago
Ammonium phosphate nh43po4 is an important ingredient in many fertilizers. it can be made by reacting phosphoric acid h3po4 with
Tom [10]
The reaction between phosphoric acid and ammonia that produces ammonium phosphate can be written as follows:
3NH3 + H3PO4 ..................> (NH4)3PO4

From the periodic table:
molar mass of nitrogen = 14 grams
molar mass of hydrogen = 1 grams
molar mass of oxygen = 16 grams
molar mass of phosphorus = 30.9 grams

based on this:
molar mass of 3NH3 = 3 (14 + 3(1)) = 51 grams
molar mass of H3PO4 = 3(1) + 30.9 + 4(16) = 97.9 grams
molar mass of  (NH4)3PO4 = 3 (14 + 4(1)) + 30.9 + 4(16) = 54 + 30.9 + 64
                                            = 148.9 grams

Therefore, 97.9 grams of phosphoric acid is required to produced 148.9 grams of ammonium phosphate.
Thus, to know the mass of ammonium phosphate produced from 4.9 grams of phosphoric acid, we will simply use cross multiplication as follows:
amount of produced ammonium phosphate = (4.9 x 148.9) / 97.9 = 7.45 g
3 0
3 years ago
Read 2 more answers
What is the lowest point of a wave called?<br><br> Amplitude<br> Crest<br> Frequency<br> Trough
zavuch27 [327]
<h3>Answer:</h3>

Trough

<h3>Explanation:</h3>

We need to answer the following questions

What is a wave?

  • A wave refers to a transmission of a disturbance from one point to another. It involves transfer of energy from the source to other points.

What are the major types of wave?

  • Waves may be classified as longitudinal waves or transverse wave based on the vibration of particles relative to the direction of transmission.

What is a transverse wave?

  • A transverse wave is a wave in which the vibration of particles is perpendicular to the direction of transmission of the wave.
  • This type of wave contains highest points known as crests and lowest points known as troughs.
5 0
3 years ago
Read 2 more answers
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