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
Rus_ich [418]
3 years ago
15

How have ideas about the atom changed in the last two centureies?

Chemistry
1 answer:
dsp733 years ago
8 0
In the past a scientist named dalton produced an atomic theory. There were certain problems regarding his views. So, later on scientists like chadwick, rutherford and thompson added some fresh light for the real identification of the atom.
dalton said the atom was the smallest unit and it CANNOT BE DIVIDED ANY FURTHER.
NOTE... this was renected with the discovery of the proton, neutron and electron as the sub atomic particles.

You might be interested in
ASAP PLEASE, 25 POINTS!
raketka [301]

The answers D. A carrier

6 0
3 years ago
Read 2 more answers
What pressure will be exerted by 26g if CO2 at a temperature of 35C and a volume of 550ml?
STALIN [3.7K]

Answer:

P = 28.5 atm

Explanation:

PV = nRT => P = nRT/V

P = Pressure = ?

n = moles of sample = mass/molar mass = 26g/44g·mol⁻¹ = 0.619 mole CO₂

R = gas constant = 0.08206 L·atm/mol·K

T = temperature in Kelvin = (35 + 273)K = 308K

V = volume in Liters = 550 ml = 0.550 L

Pressure (P) = nRT/V

= (0.619 mole)(0.08206 L·atm/mol·K)(308K)/(0.550 L) = 28.5 atm

3 0
3 years ago
What is the percentage of water in the hydrate cocl2 • 6h2o
lord [1]

Answer:

52.17%

Explanation:

COCl2.6H20

C=12,O=16,Cl=35.5,H=1

Relative molecular mass of COCl2.6H2O= 12+16+71+6(2+16) = 99 + 108= 207g

Relative molecular mass of 6H2O = 108g

Percentage of water = (108/207 )*100

= 52.17%

8 0
3 years ago
What is the correct electron dot symbol for an alumminum atom in the ground state?
weqwewe [10]

Answer: Aluminum is in group IIIA of the periodic table therefore it has three valence electrons. The symbol for aluminum is Al which will be surrounded by three dots. 2.

Explanation:

7 0
3 years ago
You measure the mass of a model car to be 230 grams.The actual mass is 218 grams .what is your percent error
LenKa [72]
Your percent is 5.50458716
8 0
3 years ago
Other questions:
  • Suppose a current of 0.880 A flows through a copper wire for 132. seconds. Calculate how many moles of electrons travel through
    9·1 answer
  • Which of the following represents a stable octet? A 1s2 2s2 2p6 3s2 3p6 4s2
    14·1 answer
  • A pump contains 0.5 l of air at 203 kpa. you draw back on the piston of the pump, expanding the volume until the pressure reads
    11·1 answer
  • If a DNA molecule is found to be made of 40% thymine,What percentage guanine would you expect
    7·1 answer
  • So i have a science question i need help with: Explain why it is a good practice to leave a hot beaker to cool before washing un
    10·1 answer
  • What is an example of a stable system
    13·2 answers
  • What are all resonance structures for SO3?
    13·1 answer
  • What is matter?<br> 12 points..
    10·1 answer
  • 3 difference between Homogeneous mixture and Heterogeneous Mixture​
    10·1 answer
  • What effect does getting 8 hours of sleep have on 8th grade science test scores ?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!