Question

The density of lead is 11.3 g/mL. What is the mass of 45 mL of the metal?

Answer 1

Hint: A substance's density is defined as its mass per unit volume. Temperature and pressure affect the density of a substance. For solids and liquids, this variance is generally minor, but for gases, it is significantly higher. When you apply more pressure on an object, it shrinks in volume and so becomes denser. With a few exceptions, increasing the temperature of a material reduces its density by increasing its volume.
 $ \rho =\dfrac{m}{V} $ ,
where $ \rho $ is the density, m is the mass, and V is the volume.

Complete Step By Step Answer:
A substance's density is defined as its mass per unit volume. Although the Latin letter $ \rho $ , D can also be used, the most common sign for density is.
Density is calculated by dividing mass by volume:
 $ \rho =\dfrac{m}{V} $ , where $ \rho $ is the density, m is the mass, and V is the volume. Although this is scientifically incorrect, density is sometimes roughly described as weight per unit volume. This quantity is more precisely known as specific weight.
Temperature and pressure affect the density of a substance. For solids and liquids, this variance is generally minor, but for gases, it is significantly higher. When you apply more pressure on an object, it shrinks in volume and so becomes denser. With a few exceptions, increasing the temperature of a material reduces its density by increasing its volume. Heating the bottom of a fluid causes heat to convect from the bottom to the top in most materials due to a reduction in the density of the heated fluid. As a result, it rises in comparison to more dense unheated material.
Density $ =\dfrac{\text { Mass }}{\text { Volume }} $
Mass $ = $ Density $ \times $ Volume
Given;
Density $ =\dfrac{11.3 g}{m L} $
Mass $ =45 m L $
Plugging in the values..
Mass $ =\dfrac{11.3g}{mL}\times 45mL $
Mass $ =11.3 g \times 45 $
Mass $ =508.5 g $
Hence 508.5 g is the correct answer.

Note:
The density of materials may be measured using a variety of procedures and standards. A hydrometer (a buoyancy method for liquids), hydrostatic balance (a buoyancy method for liquids and solids), immersed body method (a buoyancy method for liquids), pycnometer (liquids and solids), air comparison pycnometer (solids), oscillating densitometer (liquids), and pour and tap are examples of such techniques (solids). However, because each method or methodology measures a different type of density (e.g., bulk density, skeleton density, etc. ), it is important to understand both the type of density being measured and the type of material being measured.