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Inga [223]
3 years ago
8

Which of the following elements in group 1 of the periodic table has the smallest atomic radius?

Chemistry
1 answer:
ivann1987 [24]3 years ago
6 0
The element in group 1 of the periodic table that had the smallest atomic radius is A. Lithium.
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3.79 x 10^8<br> =<br> .mol<br> 2<br> 2<br> kg.m<br> g.cm
yuradex [85]

Answer:

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Is my answer correct?
natta225 [31]

Yes the ANSWER is Correct-

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3 years ago
In 1773 Benjamin Franklin, investigating the calming effect of oil on the water of a pond near London, observed that a teaspoonf
likoan [24]

Answer:

a. 2.44 nm

b. 15.33 nm²

Explanation:

a. Calculate the thickness (in nm) of the surface film

Since the volume of a teaspoon equals V = 4.93 cm³ and the area of the oil film is half an acre = 1/2 × 4046.86 m² = 2023.43 m²

The volume of the oil film, V' equals the volume of the oil in the teaspoon, V

V' = Ah where A = cross-sectional area of oil film = 2023.43 m² = 2023.43 × 10⁴ cm² and h = height of oil film

So, V' = V

Ah = V

h = V/A

= 4.93 cm³/2023.43 × 10⁴ cm²

= 0.00244 × 10⁻⁴ cm

= 2.44 × 10⁻⁷ cm

=  2.44 × 10⁻⁷ cm × 1m/100 cm

= 2.44 × 10⁻⁹ m

= 2.44 nm

b. The surface area (in nm2) occupied by an oleic acid molecule on water.

Since the height of the oil film equals the diameter of the oil molecule, and the molecule is assumed to be a sphere of radius, r. Its surface area is thus A = 4πr²

r = h/2 = 2.44 nm/2 = 1.22 nm

A = 4πr²

A = 4π(1.22 nm)²

A = 4.88π nm²

A = 15.33 nm²

7 0
3 years ago
Mutations that neither benefit nor harm the organism have (blank) effect on the organism’s survival
Lisa [10]

Answer:

neutral

Explanation:

neutral = no effect

7 0
3 years ago
Is a rock a mixture, element, compound or mineral
VladimirAG [237]
The answer is compound. I hope this helps! :)
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