Answer:
physical change
Explanation:
there is no change in the water's chemical formula
Answer:
None
Step-by-step explanation:
A high pH is caused by an excess of hydroxide over hydrogen ions.
Hydroxide ions are so small that they pass through the pores of an ordinary filter.
Thus, ordinary filtration has no effect on the pH of water.
Answer:
The proper matching is given below.
Explanation:
a Separate molecules by size size exclusion chromatography
b Separate molecules by charge Ion exchange chromatography
c The stationary phase has a covalently bound group to which a protein in the mobile phase can bind. Affinity chromatography
d uses mobile phase and stationary phase to separate protein Size exclusion chromatography
e The stationary phase contain cross linked polymers with different pore size
Size exclusion chromatography
f can separate molecules based on protein ligand binding Affinity chromatography
g The stationary phase may contain negatively or positively charged groups
ion exchange chromatography
The molar mass of the gas with the given mass and volume at the given temperature and pressure is 16.00g/mol.
<h3>What is the molar mass of the gas?</h3>
From the Ideal gas law or general gas equation;
PV = nRT
Where P is pressure, V is volume, n is the amount of substance, T is temperature and R is the ideal gas constant ( 0.08206 Latm/molK )
Given that;
- Temperature T = 21°C = (21 + 273.15)K = 294.15K
- Pressure P = 745 mmHg = (745/760)atm = 0.98026atm
- Volume of the gas V = 3.97L
- Mass of gas m = 2.58g
First, we determine the amount of gas;
PV = nRT
n = PV / RT
n = ( 0.98026atm × 3.97L ) / ( 0.08206 Latm/molK × 294.15K )
n = 3.8916Latm / (24.137949Latm/mol)
n = 0.1612mol
Molar Mass = Mass of the gas / Amount of the gas
Molar Mass = m / n
Molar Mass = 2.58g / 0.1612mol
Molar Mass = 16.00g/mol
Therefore, the molar mass of the gas with the given mass and volume at the given temperature and pressure is 16.00g/mol.
Learn more about ideal gases here: brainly.com/question/15634266
#SPJ1
The overlapping of two s atomic orbitals produces two molecular orbitals, <span>one bonding molecular orbital and one anti-bonding molecular orbital.
Whenever two atomic orbitals overlap according to molecular orbital theory, it will produce one bonding and one anti bonding molecular orbital. Molecular orbital theory is also a way for determining molecular shape wherein electrons are not assigned to character bonds between atoms, however are dealt with as transferring underneath the effect of the nuclei within the entire molecule.</span>