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3 years ago

What are the basic properties of the outer shell of an element?

1 answer:

7 0

The number of electrons in the outermost shell of an atom determines its physical and chemical properties. All elements are most stable with 8 electrons (an octet) in their outer shell.

Hope this helps!!

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Select all the correct locations.

NikAS [45]

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The land breeze arrow is correct

The rest are incorrect.

Warm air should 'rise' by the land

This air then moves towards the sea and cools down

The cool air would then sink

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5 0

4 years ago

Read 2 more answers

Select all that apply.

MakcuM [25]

Answer:

A telescope, printing press, and microscope

Explanation:

8 0

3 years ago

Which of the following observations is usually not evidence of a chemical change ?

Nookie1986 [14]

Answer:

Explanation:

Have a nice day

5 0

4 years ago

What is measured by the reaction rate? the probability that a reaction will occur the speed at which products form the time requ

Cloud [144]

Answer: the speed at which products form

Explanation:

Rate of a reaction is defined as the speed at which a chemical reaction proceeds. It is often expressed in terms of the concentration of a reactant that is consumed in a unit time or the concentration of a product that is formed in a unit of time.

For a general reaction : $A\rightarrow B$

$Rate=-\frac{d[A]}{dt}$

or $Rate=+\frac{d[B]}{dt}$

where d[A] = change in concentration of reactant A

d[B] = change in concentration of product B

dt = time interval

5 0

3 years ago

How many molecules are there in 4.00 l of oxygen gas at 500.∘ c and 50.0 torr?

Oliga [24]

From the ideal gas law
pv=nRT , n is therefore PV/RT
R is the
R is gas constant =62.364 torr/mol/k
P=500torr
V=4.00l
T=500+273=773k
n={(500 torr x 4.00l)/(62.364 x773k)}=0.041moles
the number of molecules=moles x avorgadro costant that is 6.022x10^23)
6.022 x 10^23) x0.041=2.469 x10^22molecules

3 0

3 years ago