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nlexa [21]
3 years ago
8

In your own words, give a summary of the history of the atom. Make sure to use names of models and the scientists associated wit

h each. Make a different paragraph for each model/scientist. (ADV is a minimum of 5 paragraphs) Notice that the Atomic Theory has changed over time as scientists have added knowledge through experimentation and use of advanced instruments. Be sure to include the following: Plum pudding model orbitals electrons gold foil experiment Bohr's model protons nuetrons nucleus
Chemistry
2 answers:
Stella [2.4K]3 years ago
4 0
2 or more I don’t really know what the answer is
KatRina [158]3 years ago
3 0

Answer:

The answer is number 2

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Write out the word equations for these reactions.<br> ) Hydrogen reacts with oxygen to form water.
ale4655 [162]

Answer:

H2O

Explanation:

PLS MARK ME TO THE BRAINLIST

4 0
3 years ago
Brenda rode a skateboard 95 meters west. It took her 20 seconds. What was
Artemon [7]

Answer:

D. 4.75 m/s west

Explanation:

You can immediately get the answer once you know the formula for<em> velocity.</em>

  • The formula for velocity is: Velocity (V) = \frac{distance (d)}{time (t)}

The distance is 95 meters while the time is 20 seconds. All you have to do is to divide <u>95 meters by 20 seconds</u>.

Let's solve:

  • V = \frac{d}{t}
  • V = \frac{95 meters}{20 seconds}
  • V = 4.75 meters per second

Since Brenda is going west with her her skateboard, then you have to add <em>west </em>as her direction.

Brenda's velocity is 4.75 m/s west.

5 0
3 years ago
How many atoms are present in 7.50 mol of chlorine atoms? _
vodomira [7]

Answer:

4.52 x 10²⁴ atoms Cl

Explanation:

A mole is a name that means a certain number like a dozen means 12. 1 mole of chlorine atoms is 6.022 x 10²³ chlorine atoms. The unit conversion is 6.022 x 10²³/mol.

7.50molCl*\frac{6.022 x 10^{23} atomsCl}{1molCl} = 4.5165*10^{24} atomsCl

Round to 4.52 x 10²⁴ atoms Cl for the correct number significant figures.

6 0
3 years ago
Find the vapor pressure of a water solution in which the
zheka24 [161]

Answer:

The vapor pressure in solution is 0,0051 atm

Explanation:

This is the formula for vapor pressure lowering, the colligative property.

P vapor = Pressure sv pure . Xsv

Where Xsv is data.

Xsv means Molar fraction (moles solvent/total n° moles)

Vapor pressure of water, pure is 17.5 mmHg

P vapor = 0,0313 atm . 0163

P vapor in solution = 0,0051 atm

Molar fraction does not have units

A solution will have less vapor pressure than that observed in the pure solvent.

5 0
3 years ago
PLEASE HELP!
KatRina [158]
Hello the answer is c love
7 0
3 years ago
Read 2 more answers
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