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Strike441 [17]
3 years ago
6

Match each scientist to their discovery regarding the atom

Chemistry
2 answers:
weeeeeb [17]3 years ago
4 0

Answer:

Rutherford : Atoms have a positive nucleus.

Thomson : Atoms contain electrons.

Dalton : Atoms are indivisible.

Millikan : Atoms have a charge of -1.

neonofarm [45]3 years ago
3 0

Answer:

Thomson--atoms cotain electron

Ernest Rutherford--atoms have a positive nucleus

R.A Millikan--electrons have Q=-1

Dalton--atoms are indivisible

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Correct answer will be marked brainliest!
tigry1 [53]

Answer:

0.0660 moles

Explanation:

Change torr to atm and change celcius to kelvin.

(1.35L)(.987 atm)/(0.08206 L atm /mol k)(290k)

= 0.0660 mol

4 0
3 years ago
What element has 2 electrons in the 4s sub level?
ruslelena [56]

is the Calcium because the calcium in group two which group two has 2 electron and also calcium and Potassium 4s sub level group potassium has 1 electron. :)


4 0
3 years ago
What is used to reduce energy loss?<br><br> conductors <br> currents<br> radiators<br> insulators
asambeis [7]
Usually insulators are used to reduce energy loss (D)
4 0
3 years ago
Read 2 more answers
Rotting food is an example of a chemical reaction. Many foods will not quickly less kept in a refrigerator. From this
pantera1 [17]

Answer:

A. Increasing the temperature of a chemical reaction speeds up the reaction rate.

Explanation:

The higher the temperature is, the faster a chemical reaction will happen. Food rots slower in refrigerators because it is cold, outside, they rot faster.

6 0
3 years ago
Draw bond-line formulas of all dichloro derivatives that might be formed when 1-chloro-2,2,3,3,-tetramethylpentane is allowed to
Alex73 [517]

Answer:

Explanation:

This is a halogenation reaction i.e substitution or replacement of a single or more than a single hydrogen atom in the organic alkane compound with the halogen(here it is chlorine).

The chlorination of 1-chloro-2,2,3,3-tetramethylpentane under UV light resulted in the formation of five (5) dichloro derivatives which are shown in the image attached below.

Also, the compounds containing a stereocenter (i.e a location within the compound composing of various substituents in which the interchangeability of these substituents has the tendency of resulting into a stereoisomer) are indicated with an asterisk in the image below.

From the image below:

compound 1 ⇒  1,1-dichloro-2,2,3,3-tetramethylpentane = 2° C

∴

The given relative reactivity rate for 2°  = 3.6x

For compound 2 ⇒  1,4-dichloro-2,2,3,3-tetramethylpentane = 2°  = 3.6x

For compound 3 ⇒ 1,5-dichloro-2,2,3,3-tetramethylpentane = 1°  = 1x

For compound 4 ⇒ 1-chloro-2-chloromethyl-2,3,3-trimethylpentane

= 1°  = 1x

For compound 5 ⇒ 1-chloro-3-chloromethyl-2,2,3-trimethylpentane

= 1°  = 1x

As such, we have:

2(3.6x) + 3(1x) = 100

7.2x + 3x = 100

10.2x = 100

x = 100/10.2

x = 9.803°

∴

For compound (1) = 3.6(9.803) = 35.3%

For compound (2) = 3.6(9.803) = 35.3%

For compound (3) = 1(9.803) = 9.803°%

For compound (4) = 1(9.803) = 9.803°%

For compound (5) = 1(9.803) = 9.803°%

6 0
3 years ago
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