Answer:
Oiling is done on a regular basis to sewing Machine because in the machine there are lots of machinery parts i.e. wheels and axels, etc. which are in continuous use and they possess so much frictional force between them that wear tear may be observed in those parts.
Answer:
I hope this helps 52.2 g/mol
Explanation:
1) Solve for the moles using PV = nRT:
n = PV / RT
n = [(700.0 mmHg / 760.0 mmHg atm¯1) (48.0 L)] / [(0.08206 L atm mol¯1 K¯1) (293.0 K)]
n = 1.8388 mol
2) Divide the grams given (96.0) by the moles just calculated above:
96.0 g / 1.8388 mol = 52.2 g/mol
<span>The true ratio of atoms in a molecule or formula unit is called the molecular formula. This formula can show exactly how many and what types of atoms there are in a molecule, but it cannot show how they are arranged structurally. For example, the molecular formula for cyclopropane is C3H6. </span>
Water is deemed as a polar molecule because of the electrostatic attraction occurring between molecules. One major key characteristic of knowing polar molecules is knowing their atomic geometry. Now, we know that water has two hydrogens and one oxygen atom covalently bonded to each other. This means that they share electrons. However, this sharing is unequal because oxygen is more electronegative compared to hydrogen. So, the electrons tend to be nearer to the oxygen atom making it partially negative. On the other hand, the hydrogen would be partially positive. Polarity arises when there is an imbalance in the pull of electrostatic forces between individual atoms. If you look at the molecular geometry of water, its shape is bent. As a result, it creates a dipole moment which attracts solute to bond with water. In chemistry, the primary rule of solubility is that 'like dissolves like'. This means that polar solutes will dissolve in polar solvents. Similarly, nonpolar solutes will dissolve in nonpolar solvents.
