Since this has to do with titration, the measured volume of NaOH used would be less than the actual volume used because some of the unused NaOH would cling to the sides of the buret and therefore wouldn't factor into the measurement
Hope this helps
find mass of oxygen by subtracting mass of phosphorus from the total mass
divide the masses by the molar mass to get moles
divide moles by the smallest amount of moles
multiply by 2 to get a nice number
P4O5
The heat is involved in the production of 5.0 mol of MgO is 180 Kj
calculation
2 Mg (s) +O2 → 2 MgO
From the equation above two moles of MgO is used therefore
72.3 is for 2 moles
that is 72.3 kj = 2moles
? = 5 moles
by cross multiplication
= 72.3 kj × 5/2 = 180 Kj
Critical thinking and skepticism are important to scientific inquiry because they help scientists to thoroughly examine all evidence before making their conclusions, this allows them to avoid errors. Critical thinking refers to the attitude of asking questions constantly, thoroughly examining information and evidence and making valid conclusions. While skepticism refers to an attitude of doubt. These attitudes are very important in scientific investigations; it helps scientists to be able to provide good evidence on which they base their conclusions.
Answer:
B
Explanation:
Compounds are made up of 2 or more different atoms that bond to form a compound.
