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S_A_V [24]
2 years ago
13

Mass=35g density=5 g/cm3 what is the volume?

Chemistry
2 answers:
krek1111 [17]2 years ago
6 0

\large \mathfrak{Solution : }

given values :

mass = 35 g

density = 5 g/cm³

we know that :

  • \boxed{density =  \dfrac{mass}{volume} }

  • 5 =  \dfrac{35}{vol}

  • vol =  \dfrac{35}{5}

  • volume = 7 \: cm {}^{3}  \: or \: 7 \: litres
sladkih [1.3K]2 years ago
3 0

Answer:

You would divide the mass by the density. The volume would be 7 cm^3.

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b) HCN : acid CN^- :conjugate base.

And, H_2O : base H_3O^+: conjugate acid.

c) HCN(aq.)+NaOH(aq)\rightleftharoons NaCN(aq.)+H_2O(l)

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The equation for the dissociation of HCN acid is given by:

HCN(aq.)+H_2O\rightleftharoons H_3O^+(aq.)+CN^-(aq.)

b) According to the Bronsted-Lowry conjugate acid-base theory, an acid is defined as a substance which looses donates protons and thus forming conjugate base and a base is defined as a substance which accepts protons and thus forming conjugate acid.

For the given chemical equation:

HCN is loosing a proton, thus it is considered as an acid and after losing a proton, it forms CN^- which is a conjugate base.

And, H_2O is gaining a proton, thus it is considered as a base and after gaining a proton, it forms H_3O^+ which is a conjugate acid.

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HCN(aq.)+NaOH(aq)\rightarrow NaCN(aq.)+H_2O(l)

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NaCN(aq)\rightarrow Na^+(aq.)+CN^-(aq)

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