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Darya [45]
3 years ago
14

What is the softest mineral and what is its number

Chemistry
2 answers:
nikitadnepr [17]3 years ago
8 0
The Mineral Talc<span>, which has a hardness of one (1) on the Mohs Hardness Scale

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Rama09 [41]3 years ago
4 0
The softest mineral is talc. The chemical compound for it is H2Mg3(SiO3)4<span> or Mg</span>3Si4O10(OH)<span>2</span>
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A lab technician mixes a 0.730 M solution of sodium bromide (NaBr) and water. The volume of the solution is 135 milliliters.
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Answer:

We need 10.14 grams of sodium bromide to make a 0.730 M solution

Explanation:

Step 1: Data given

Molarity of the sodium bromide (NaBr) = 0.730 M

Volume of the sodium bromide solution = 135 mL = 0.135 L

Molar mass sodium bromide (NaBr) = 102.89 g/mol

Step 2: Calculate moles NaBr

Moles NaBr = Molarity NaBr * volume NaBr

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Step 3: Calculate mass of NaBr

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Mass NaBr = 10.14 grams

We need 10.14 grams of sodium bromide to make a 0.730 M solution

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Paramagnetism in atom occurs whenever at least one orbital of an atom has a net spin of electron. That is a paramagnetic electron is just an unpaired electron in the atom.

Here is a twist even if an atom have ten diamagnetic electrons, the presence of at least one paramagnetic electron, makes it to be considered as a paramagnetic atom.

Simply put paramagnetic elements are one that have unpaired electrons, whereas diamagnetic elements do have paired electron.

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Explanation:

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