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ycow [4]
2 years ago
15

WILL GIVE 50 POINTS AND BRAINLIEST Describe the properties of alkaline earth metals. Based on their electronic arrangement, expl

ain whether they can exist alone in nature.
Chemistry
1 answer:
Arisa [49]2 years ago
7 0
Alkaline earth metals are metals of group two. They are divalent metals and they have a highly negative reduction potential hence the metals are mostly extracted by electrolysis.

They are highly reactive metals. They react with water but do so less readily than alkali earth metals.

Owing to their high reactivity, they are seldom found free in nature. They always occur in combined state with other highly reactive nonmetals.
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Molybdenum has a molar mass of 95.94g/mol. How many molecules of molybdenum are in 150.0 g of molybdenum
Kitty [74]
We are given the molar mass of Molybdenum as 95.94 g/mol. Also, the chemical symbol for Molybdenum is Mo. This question is asking for the amount of molecules of molybdenum in a 150.0 g sample. However, since molybdenum is a metal and it is in the form of solid molybdenum, Mo (s), it is not actual a molecule. A molecule has one or more atom bonded together. We will instead be finding the amount of atoms of Molybdenum present in the sample. To do this we use Avogadro's number, which is the amount of atoms/molecules of a substance in 1 mole of that substance.

150.0 g Mo/ 95.94 g/mol = 1.563 moles of Mo

1.563 moles Mo x 6.022 x 10²³ atoms/mole = 9.415 x 10²³ atoms Mo

Therefore, there are 9.415 x 10²³ atoms of Molybdenum in 150.0 g.
5 0
4 years ago
What is the source of EXTERNAL energy for Earth's spheres and systems?
UkoKoshka [18]

The earth is a vast, complex system powered by two sources of energy: an internal source (the decay of radioactive elements in the geosphere, which generates geothermal heat) and an external source (the solar radiation received from the Sun); the vast majority of the energy in the earth system comes from the Sun.

3 0
3 years ago
When ammonium phosphate and nickel(ii) nitrate solutions are mixed, what precipitates out?
Sphinxa [80]

2(NH4)3PO4 (aq) + 3Ni(NO3)2(aq) ------> Ni3(PO4)2(s) + 6NH4NO3 (aq)

Ni3(PO4)2 is a precipitate.

5 0
4 years ago
Read 2 more answers
List 5 things which we can make using each of the following materials​
AnnZ [28]

Answer:

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2.mirrors

3.glass shelves

4.wrist watch glass

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Metal

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4.window frames

5.screws and nails

Plastic

1.bottles

2.boxes

3.balls

4.carry bags

5.buckets and mugs

Wood

1.chairs

2.tables

3.shoe stand

4.dressing table

5.shelves

4 0
3 years ago
3. Arne wants to test what color, red or violet, attracts more insects. He tapes a piece of red
joja [24]

Answer:

I swear this is where you reside, you reside

Please, bae, don't go switching sides, switching sides

Yeah, yeah, yeah, yeah

Ooh-ooh, please don't throw your love away, huh

Plea 6968966

6 0
3 years ago
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