The number of Ml of 0.80 M sucrose solution that contain
(A) 7.45 g are 27.25 Ml
<u>calculation</u>
volume= moles /molarity
molarity = 0.80 M which is the same as 0.80 mol/l
moles= mass/molar mass
= 7.45 g/ 342.3 g/mol =0.0218 moles
volume is therefore = 0.0218 moles / 0.80 mol/L=0.02725 L
convert into ml by multiplying by 1000
= 27.25 ml
<h3>
<u>
question b</u></h3>
volume = moles/molarity
molarity = 0.80 M = 0.80 Mol/L
moles =mass/molar mass
mass 17.0 mg convert into g by diving by 1000=0.017 g
moles is therefore = 0.017 g/ 342.3 g/mol = 4.97 x10^-5 moles
volume = (4.97 x 10^-5 moles) /0.8 mol /l=6.21 x10^-5 L
= 6.21 x10^-5 x 1000 =0.0621 Ml
Answer: Major scale and minor scale both relate the precision of measurements with more true value of measurement.
Explanation:
Major scale in a measuring device is maximum unit value on the scale that can be measured.
Minor scale in a measuring device is a least unit value on the scale that can be measured.
In a metric ruler major scale is 1 cm and minor scale is 0.1 mm which means one can measure accurate value up-to one decimal point and in 10 ml of graduated cylinder major scale division is 1 ml minor scale division is 0.01.
Physical change, a change that occurs physically, and can also be seen physically. But chemically, it's a change that occurs within the chemical, and most likely not be seen within the eyes, but, has a different charater afterward.
The answer to the question would be B since Nitrogen is the most abundant gas in our atmosphere
Ticks can live in the winter
