The Answer to your question would be A
Answer:
135g Na2CO3
Explanation:
I'm going to assume you mean Molality which is mol solute/kg solvent
Molarity would be mol soute/ L solution
we know we have 155g of water which is .155 kg
essentially we have the equation:
mol/kg = 8.20
we substitute .155 in for kg and get:
mol/.155 = 8.20
Solving this gives mol = 1.271
now we must convert to grams using the molar mass
Molar mass Na2CO3 = 106G/mol
so to cancel moles we multiply:
1.271mol x 106g/mol
= 135g
Answer:
The answer to your question is Al, Mg, Si, S, P
Explanation:
First ionization energy is the energy necessary to remove an electron from an atom in a gaseous form.
Element First ionization energy (kJ/mol)
Magnesium 737.7
Aluminum 577.5
Silicium 786.5
Phosphorus 1011.8
Sulfur 999.6
Order: Al, Mg, Si, S, P
The book<span> documented the detrimental effects on the environment—particularly on birds—of the indiscriminate use of pesticides. -A</span>
