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kondaur [170]
3 years ago
6

Does anyone know how to answer this or what the answer is? My sister is having a hard time figuring this out with her tutor?

Chemistry
1 answer:
ira [324]3 years ago
8 0

Its number four.Hope that helps feel free to ask me questions:)

Brainliest??

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Calculate a reasonable amount (mass in g) of your unknown acid to use for a titration. You will want about 30 mL of titrant to g
Vinil7 [7]

Answer:

"0.60 g" is the appropriate solution.

Explanation:

The given values are:

Volume of base,

= 30 ml

Molarity of base,

= 0.05 m

Molar mass of acid,

= 400 g/mol

As we know,

⇒  Molarity=\frac{Number \ of \ moles \ of \ base}{Number \ of \ solution}

On substituting the values, we get

⇒           0.05=\frac{Number \ of \ moles \ of \ base}{30\times 10^{-3}}

⇒  Number \ of \ moles \ of \ base=0.05\times 30\times 10^{-3}

⇒                                             =1.5\times 10^{-3}  

hence,

⇒  Moles \ of \ acid=\frac{Mass \ of \ acid}{Molar \ mass \ of \ acid}

On substituting the values, we get

⇒  1.5\times 10^{-3}=\frac{Mass \ of \ acid}{400}

⇒  Mass \ of \ acid=1.5\times 10^{-3}\times 400

⇒                         =0.60 \ g

8 0
3 years ago
Match these items with their examples.
postnew [5]
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The half-life of na-24 is 15 hours . when there are 1000 atoms of na-24 in a sample , a scientist starts a stopwatch . the scien
marin [14]

125 Each half life it divides by 2 the amount
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250/2=125

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3 years ago
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irakobra [83]

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  All hydrocarbons are organic compounds, but organic compound can include atoms of other elements.

b)  Alkyne has a  covalent triple bond between two carbon atoms. Simplest alkyne is ethyne HCCH.  

b) Alkane contains only Carbon and  Hydrogen and there are single bonds

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c) An alkene has one double bond between Carbon atoms. Simplest

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8 0
3 years ago
The types of bonds in ammonium chloride are​
Murrr4er [49]

Explanation:

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