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Dafna11 [192]
3 years ago
5

Which of the ffamily contains liquids, solids and gases?

Chemistry
1 answer:
Naddik [55]3 years ago
7 0
The hydrogen one because who doesnt like snoballs'

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What is the molarity of a solution containing 55.8 g of mgcl2 dissolved in 1.00 l of solution?
MakcuM [25]
The answer is 0.59 M.

Molar mass (Mr) of MgCl₂ is the sum of the molar masses of its elements.
So, from the periodic table:
Mr(Mg) = 24.3 g/l
Mr(Cl) = 35.45 g/l
Mr(MgCl₂) = Mr(Mg) + 2Mr(Cl) = 24.3 + 2 · 35.45 = 24.3 + 70.9 = 95.2 g/l

So, 1 mol has 95.2 g/l.

Our solution contains 55.8g in 1 l  of solution, which is 55.8 g/l

Now, we need to make a proportion:
1 mole has 95.2 g/l, how much moles will have 55.8 g/l:
1 M : 95.2 g/l = x : 55.8 g/l
x = 1 M · 55.8 g/l ÷ 95.2 g/l ≈ 0.59 M
7 0
3 years ago
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A gas has a pressure of 167.1 kPa. What is this pressure in atm?
Aleksandr-060686 [28]

Answer:

167100atm

Explanation:

167.1*1000=167100 atm

3 0
2 years ago
What are some facts about animal cells
11111nata11111 [884]
Compared to plant cells, which are shaped somehow like a box, animal cells are round and circular.

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3 years ago
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Black_prince [1.1K]

Answer:

efef2w

Explanation:

7 0
2 years ago
All amino acids that are found in proteins, except for proline, contain a(n); Group of answer choices amino group carbonyl group
Jobisdone [24]

Answer:

amino group

Explanation:

There are twenty (20) amino acids in nature. Generally, each amino acid is structurally made up of a central carbon atom called alpha carbon attached to a hydrogen, carboxylic acid group (-COOH) and an amine group (-NH2). However, one particular amino acid called PROLINE posseses an exception to this.

Proline, which is the only cyclic amino acid, is also the only amino acid that forms a secondary amine group i.e. loss of hydrogen atoms in its amine group when in a protein structure. This means that when in a protein, PROLINE does not have an AMINE GROUP.

7 0
3 years ago
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