Answer:
78.75g
Explanation:
The density of diamond is the mass of diamond per unit of its volume. The density of a substance is calculated using the formula:
Density (g/cm^3) = mass (g) / volume (cm^3)
According to the question, the density of diamond= 3.15g/cm^3, volume of diamond= 25cm^3, mass = ?
Hence, to calculate the mass, we say;
Mass = Volume × density
Mass = 25 × 3.15
Mass = 78.75
Therefore, the mass of diamond is 78.75grams.
Answer:
It is an example of single displacement reaction.
Explanation:
<u>Single replacement reaction:</u>
A single element replaces another element in a compound.
For example,
The given reaction is as follows.
In the above reaction, aluminium bromide is dissociated into the , these bromide ions are reacted with potassium atoms to form potassium bromide.
Here, only one element displaces therefore, it is an single displacement reaction.
In the Lewis structure of PO43- there are a total of 32 valence electrons. For the Lewis structure for PO4 3- you should take formal charges into account to find the best Lewis structure for the molecule. Remember, PO4 3- has a negative three charge on the molecule.
Answer:
a. A ball moving through the air.
Explanation:
The ball has momentum which is a form of kinetic energy.