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Nady [450]
2 years ago
9

Convert 18.9 moles to MgCl2 to formula units

Chemistry
1 answer:
Masja [62]2 years ago
3 0

Answer:

18.9 moles of MgCl2 = 17.834 kg of MgCl2

Explanation:

The molecular weight of MgCl is 80.0 g/mol . So, to convert the given mole amount to grams, multiply this by this number, which is constant for all compounds with a specific composition (mass fraction).

Considering the original question was in the context of chemistry, I wanted to make it seem formal and more educational too. Hopefully that worked!  

EDIT: Came up with some text around what happens inside cells that would have made it better if someone just had an issue converting units, but I doubt my answer will be accepted >.<

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Force F with arrow = (9.0 N)i hat − (9.0 N)k acts on a pebble with position vector r with arrow = (0.90 m)j − (1.2 m)k relative
vredina [299]

Answer:

τ = - (8.1 N-m) i - (10.8 N-m) j - (8.1 N-m) k

Explanation:

Given

r = (0 m) i + (0.9 m) j - (1.2 m) k

F = (9 N) i + (0 N) j - (9 N) k

We can apply

τ = r x F

τ = ((0 m) i + (0.9 m) j - (1.2 m) k) x ((9 N) i + (0 N) j - (9 N) k)

⇒  τ = - (8.1 N-m) i - (10.8 N-m) j - (8.1 N-m) k

6 0
3 years ago
Can someone pleas help
bekas [8.4K]

Answer:

Looks like a balloon to me

Explanation:

3 0
2 years ago
How many moles of magnesium are needed to react with 3.0 mol of O2?
labwork [276]

Answer:

2 moles

Explanation:

6 0
2 years ago
Which explains how burning a magnesium ribbon highlights a toolmark?
Setler [38]
<h2>Answer:</h2>

The magnesium ribbon, <u>D. It forms a material to cast the tool mark</u>.

<h2>Explanation:</h2>

When a magnesium ribbon is burnt in the presence of oxygen it gives out strong light and heat is produced. Apart from it, it leads to the production of substance called as magnesium oxide which is formed as the product due to the reaction of magnesium with the oxygen present in the air.

Tool marks are the mark which is created by tools while using them. In order to identify or locate them castes made up of magnesium oxide is utilized. When this is pasted on the suspected area, the tool mark of the suspected tool gets pasted on it.

6 0
3 years ago
A balloon contains 0.15 moles of co2 gas. how many molecules of co2 are in the balloon?
Sauron [17]
1- One mole is = 6.02 x 10^23 of anything, So one mole of atoms is 6.02x10^23.

2- when the balloon contains 0.15 moles of Co2 gas so:

the no.of molecules of Co2 = 0.15 x 6.02x 10^23

                                              = 9.0 x 10^22
5 0
3 years ago
Read 2 more answers
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