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nevsk [136]
2 years ago
13

Silver has a density of 10.5 g/cm³, and gold has a density of 19.3 g/cm³. Which would have a greater mass, 5 cm³ of silver or 5

cm³ of gold?
Chemistry
1 answer:
Vedmedyk [2.9K]2 years ago
8 0

Gold have a greater mass

<h3>Further explanation  </h3>

Density is a quantity derived from the mass and volume  

Density is the ratio of mass per unit volume  

The unit of density can be expressed in g/cm³ or kg/m³  

Density formula:  

\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}

ρ = density  

m = mass  

v = volume  

  • mass of Silver :

\tt mass=\rho\times V\\\\mass=10.5\times 5=52.5~g

  • mass of Gold :

\tt mass=\rho\times V\\\\mass=19.3\times 5=96.5~g

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What is the concentration of NaCl in a solution if titration of 15.00 mL of the solution with 0.2503 M AgNO3 requires 20.22 mL o
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Answer:

The concentration of NaCl = 0.3374 M

Explanation:

Given :

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1 mL= 10^{-3} L

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Molarity of a solution is the number of moles of solute present in 1 L of the solution.

Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}

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Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}

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Moles\ of\ AgNO_3 =Molarity \times {Volume\ of\ the\ solution}

Moles\ of\ AgNO_3 =0.2503 \times {20.22\times 10^{-3}}\ moles

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According to reaction stoichiometry:

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5.0611×10⁻³ moles of AgNO₃ reacts with 5.0611×10⁻³ moles of NaCl

Thus, moles of NaCl required = 5.0611×10⁻³ moles

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1 mL= 10^{-3} L

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Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}

Molarity\ of\ NaCl=\frac{5.0611\times 10^{-3}}{15.00\times 10^{-3}}

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<u>Thus, the concentration of NaCl = 0.3374 M</u>

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