Magnesium dichloride or Magnesium chloride
We have to calculate volume of gas at 700 mm Hg pressure.
The answer is 457.14 ml.
The pressure can be calculated by using Boyle's law. At constant temperature, for a given mass of an ideal gas pressure is inversely related to volume.
As per Boyle's law, P₁V₁ = P₂V₂, where P is pressure and V is volume of gas.
Given, P₁= 800 mm Hg, V₁= 400 ml and P₂= 700 mm Hg, V₂=?
800 X 400 = 700 X V₂
So, V₂= (800X400)/700 = 457.14 ml
Enzymes are needed to digest food in stomach
Answer:
Phosphorus is more electronegative than hydrogen
Explanation:
Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons towards itself thereby making a molecule to be polar. The Pauling scale is the most commonly used to measure electronegativity. Fluorine (the most electronegative element) is assigned a value of 4.0 on the Pauling's scale, and values range down to caesium and francium which are the least electronegative elements.
Electronegativity increases from left to right across the periodic table (across the period) hence, phosphorus is far more electronegative than hydrogen. Being more electronegative than hydrogen, phosphorus attracts the bonding electron pair of the P-H bond closer to itself than hydrogen. Since the electrons of the bond are closer to phosphorus than hydrogen, the phosphorus atom acquires a partial negative charge while the hydrogen atom acquires a partial positive charge.
