274 amu
Explanation:
Atomic weight of Na = 23
Atomic weight of Sio3 = 76
then,
molecular weight of Na2Sio3 = add 23*2 and 76*3
= 46 and 228
= 274 amu
Answer:
a three-dimensional shape having eight plane faces, especially a regular solid figure with eight equal triangular faces.
Explanation:
<span>Now. a 1m (that is a 1molal) solution is prepared by disssolving the molar mass in grams of the solute in 1kg or 1000g of solvent
Therefore a 0.244m solution is prepared by dissolving 32.0420*0.244 = 7.818g CH3OH in 1000g water
But you want to use only 400g water:
mass required = 7.818*400/1000 = 3.127g
Answer: dissolve 3.13g CH3OH in 400g water.</span>
the answer should be B the rate at which work is accomplished