2.5 × 10^-1 i believe is your answer
Answer:
Heat is absorbed.
Explanation:
Endothermic reactions: Heat is absorbed.
So that they combine smoothly and you aren't left with separated looking salad dressing. With polarity only, like-polarities dissolve like-polarities. So you must make sure that all your ingredients are polar or all are nonpolar.
3.44x10^2
you move the decimal over to get a single digit number with change. The number of times you move the decimal is the number for the 10 power
Answer:
34.23 g
Explanation:
Molarity -
Molarity of a substance , is the number of moles present in a liter of solution .
M = n / V
M = molarity
V = volume of solution in liter ,
n = moles of solute ,
Moles is denoted by given mass divided by the molecular mass ,
Hence ,
n = w / m
n = moles ,
w = given mass ,
m = molecular mass .
From the question ,
M = 0.20 M
V = 500mL
Since,
1 L = 1000mL
1 mL = 0.001L
V = 500 mL = 0.5 L
Using the above formula moles can be calculated as -
M = n / V
0.20 M = n / 0.5 L
n = 0.1 mol
The mass of sucrose can be calculated as -
n = w / m
n = 0.1 mol
m ( for sucrose ) = 342.3 g/mol
0.1 mol = w / 342.3 g/mol
w = 34.23 g