1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
tatuchka [14]
3 years ago
15

Кее 2. How have observations of the natural world helped in the development of calendars?

Chemistry
1 answer:
vaieri [72.5K]3 years ago
5 0

Answer:

ooooooiooiiiiioloolookololo

You might be interested in
Carbon dioxide is treated with coke.​
Troyanec [42]
It reacts with it and creates carbon monoxide and the affects of it weakens
7 0
2 years ago
If oxygen has a molar mass of 16.0 g/mole, carbon has a molar mass of 12.0 g/mole and hydrogen has a molar mass of 1.01 g/mole,
Stolb23 [73]
The number of mole of ethanol present in the beaker is 0.217 mole

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

How to determine the mole of C₂H₅OH
From the question given above, the following data were obtained:
Mass of C₂H₅OH = 10 g
Molar mass of C₂H₅OH = (12×2) + (1.01×5) + 16 + 1.01 = 46.06 g/mol
Mole of C₂H₅OH =?

Mole = mass / molar mass
Mole of C₂H₅OH = 10 / 46.06
Mole of C₂H₅OH = 0.217 mole


Learn more about mole:
brainly.com/question/13314627

#SPJ1
5 0
2 years ago
Suppose you will fill a glass with ice cubes. When the ice cubes melt, is the glass still full
goblinko [34]
No. It will not still be full. The reason being is because when it melts, it's almost the same thing as compacting things down into another object (container). Therefore, you will have some room left i the glass. Like, if your trashcan was over-flowing, and you push it down to compact it so you can add more trash. So when the ice melts, it will not be full.
7 0
3 years ago
Express the pressure 545 mm Hg in kilopascals.
Arlecino [84]

545mm Hg in Kilopascals is 72.6607

I hope this helps you. Good luck stay safe, healthy and, happy!<3

6 0
2 years ago
Identify the following as physical (P) or chemical (C) changes.
Stels [109]

holacomo es tu pregunta nola entiendo

lanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following is a trend in the periodic table from top to bottom?
    11·2 answers
  • In the polar molecule HBr, what charge does the H bear
    7·1 answer
  • • Can you explain what a scientific theory is and what a scientific law is
    5·2 answers
  • Can a element be decomposed by chemical means
    11·1 answer
  • How many molecules of butane (C4H10) are contained in a 9.213 g sample? How many hydrogen atoms are contained in this
    8·1 answer
  • Which has a triangular fiber? <br> Wool <br> Silk <br> Cotton <br> Nylon
    12·1 answer
  • Pure water has a pH of 7. Pure water _______.
    12·1 answer
  • How many moles are in 3.57 x 10 32<br> particles Ca?
    12·1 answer
  • How can you change a objects state of matter
    5·1 answer
  • Give me lil reasoning so I know your not lying for points
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!