Which of the following laboratory tools would be most appropriate for determining the volume of an irregular shape?

1 answer:

7 0

For an irregularly shaped objects, we use a GRADUATED CYLINDER to determine its volume by water displacement method. We fill the glassware first with water then measure the volume. Next, drop the object and read off the new volume. Calculate the difference between the volumes.

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1. Which of the following does NOT indicate that a chemical change may have taken place?

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A fracture Formation .
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Water has hydrogen bonds between Hydrogen atoms (that are slightly positive in molecules of water ) and Oxygen atoms (that are slightly negative in molecules of water), so it is necessary more energy to break them down and move water molecules from liquid state to gas.

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HELP! An atom of vanadium

Zigmanuir [339]

An atom of vanadium (V) has 23 electrons.

Given :

A vanadium (V) atom with 23 protons and has a net charge of 0.

To find:

The number of electrons in a vanadium atom

Solution:

Number of protons in vanadium atom = 23

The 0 net charge on the atom indicates that the atom has an equal number of protons and electrons which makes it a neutral atom.