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Angelina_Jolie [31]
3 years ago
7

UU

Chemistry
1 answer:
BigorU [14]3 years ago
7 0

Answer:

Samarium

Explanation:

The element Sm describe is called Samarium. This element has unique sets of properties that makes it very unique and distinct.

The lanthanides are found in the f-block on the periodic table of elements.

This element is a moderately hard silvery metal that readily oxidizes in air. It assumes an oxidation state of +3. The element has an atomic number of 62

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How a cold front affects weather.
miskamm [114]

Answer:

A cold front forms when a cold air mass pushes into a warmer air mass. Cold fronts can produce dramatic changes in the weather. ... As the cold front passes, winds become gusty. There is a sudden drop in temperature, and also heavy rain, sometimes with hail, thunder, and lightning.

4 0
3 years ago
Read 2 more answers
what is a photoelectric?explain the terms ground state and excited state with the help of labelled diagram
brilliants [131]

Answer: Photoelectric is characterized by or involving the emission of electrons from a surface by the action of light.

Photoelectric effect is the emission of electrons when a radiation of frequency higher than the threshold frequency falls on the surface of an element. The substance which undergoes photoelectric effect is called as photoelectric.

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5 0
3 years ago
Select the correct answer.
Alex

no:A

is a correct answer

7 0
3 years ago
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Sugar when dissolved into water, propose whether the compound forms atoms, molecules or lattices. Justify you answer
kirza4 [7]

Answer:

atoms

Explanation:

for sugar to dissolve in water hydaration must be equal to or greater than the lattice energy or molecular forces so when the molecular forces breaks new atoms are formed for recombination in new compound

6 0
3 years ago
A 4-g mass of NaOH is dissolved in 5mL of water.
lapo4ka [179]
Molar mass NaOH = 40.0 g/mol

Volume in liters of solution :

5 mL / 1000 => 0.005 L 

number  of moles :

4 / 40 => 0.1 moles

M = n / V

M = 0.1 / 0.005

 = 20 mol/L or 20 M

hope this helps!
6 0
3 years ago
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