Respuesta :
Answer:
The new volume reading for the graduated cylinder is :
35 mL
Explanation:
If a graduated cylinder has 32.0 mL of water in it. A 3.0 cm3 rock is dropped into the graduated cylinder. The new volume reading for the graduated cylinder is :
Here , Volume of rock is given : 3 cm3
1. Do unit conversion first
[tex]1dm^{3}=1L[/tex].........(1)
1 dm = 10 cm
[tex]1dm^{3}=(10)^{3}cm^{3}[/tex]
[tex]1dm^{3}=1000cm^{3}[/tex] .........(2)
Also.
1 L = 1000 mL........(3)
Insert the value of L and dm3 in equation (1)
[tex]1000cm^{3}=1000mL[/tex]
1000 cancel each other
[tex]1cm^{3}=1mL[/tex]
So,
[tex]3cm^{3}=3mL[/tex]
2. Find the total volume
Volume of rock = 3 mL
Volume of water = 32 mL
New volume =Volume of rock + Volume of water
New volume = 3 mL + 32 mL
New volume = 35 mL
What is need of unit conversion ?
Because Only those quantities can be added or subtracted which have same units
