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
Montano1993 [528]
3 years ago
13

Which astronomer spent 20 years plotting the positions of the planets?

Chemistry
1 answer:
devlian [24]3 years ago
3 0

Answer:

Tycho Brahe

Explanation:

Tycho Brahe spent 20 years in plotting the positions of the planets. He was among a group of astronomers who helped developing heliocentric model of the universe.

You might be interested in
Lactic acid results from which of the following?
vazorg [7]

Explanation:

Lactic acid is formed during the breakdown of glucose. This is sometimes called "blood sugar."

7 0
3 years ago
Read 2 more answers
Does 1 gallon or 100 gallons take longer to boil
Ilya [14]

Answer:

it takes 100 gallons longer to boil then it does 1 gallon

Explanation:

brainliest please??

4 0
2 years ago
Help meeeeeeee??????????​
kolbaska11 [484]

Answer:

njjii

Explanation:

uujhhhjhhhthnjkk

5 0
2 years ago
What is the relationship between atoms and static electricity
Mnenie [13.5K]
They both build up to form electricity
3 0
3 years ago
Read 2 more answers
Calculate the molecular weight when a gas at 25.0 ∘C and 752 mmHg has a density of 1.053 g/L . Express your answer using three s
stiks02 [169]

Answer:

26.0 g/mol is the molar mass of the gas

Explanation:

We have to combine density data with the Ideal Gases Law equation to solve this:

P . V = n . R .T

Let's convert the pressure mmHg to atm by a rule of three:

760 mmHg ____ 1 atm

752 mmHg ____ (752 . 1)/760 =  0.989 atm

In density we know that 1 L, occupies 1.053 grams of gas, but we don't know the moles.

Moles = Mass / molar mass.

We can replace density data as this in the equation:

0.989 atm . 1L = (1.053 g / x ) . 0.082 L.atm/mol.K . 298K

(0.989 atm . 1L) / (0.082 L.atm/mol.K . 298K) = 1.053 g / x

0.0405 mol = 1.053 g / x

x =  1.053 g / 0.0405  mol = 26 g/mol

7 0
3 years ago
Other questions:
  • Iven the parent compound, draw the mass spectrum fragment that is observed at m/z 77. include any hydrogen atoms and the charge.
    12·1 answer
  • Many manufacturing processes involve chemical reactions that reach equilibrium. Why would chemists adjust conditions to favor th
    5·2 answers
  • Which compound contains a radical
    15·2 answers
  • Fill in the word that completes each sentence. Food contains a sugar called , which is broken down in a process called cellular
    6·2 answers
  • The energy needed to get a reaction started is the
    10·2 answers
  • Which of the following elements can form diatomic molecules held together by triple covalent bonds?
    6·2 answers
  • Is iodine a atom,a molecule,an ion or a formule unit?
    13·1 answer
  • BRAINLIEST!! IGNORE IF YOU DON'T KNOW Which compound contains the highest percentage of nitrogen by mass? Choose one and show yo
    11·1 answer
  • What happens to the rate constant as activation energy increases?
    5·2 answers
  • A 5g piece of aluminum foil (c=0.897) at 100°C is dropped into a 25g container of water (c=4.184) at 20°C. What is the final tem
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!