Hey There!:
The density is the quotient between the mass of a material and the volume occupied by it, The density can be expressed for a substance or for a mixture of substances. For example, water density in ambient conditions is equal to 1.00 g/cm3, which means that in 1 cm³ or 1 mL, there are 1.0 g of water. Therefore:
D = m / V
D = 20 g / 5 mL
D = 4,0 g/mL
hope that helps!
What the first person said lol
Hey there!:
a )
number of moles of solute :
moles of solute = molarity x volume ( L )
moles of solute = 1.556 x 200.0
moles of solute = 311.2 moles of KBr
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b) Molar mass of KBr : 119.002 g/mol
1 mole KBr ----------------- 119.002 g
311.2 moles ---------------------- ( mass KBr ) ?
mass glucose = 311.2 x 119.002 / 1
mass glucose => 37033.4224 g
I believe the answer is
At the moment it is the best way of explaining our scientific knowledge.
