We are given with 500 mg of sucrose dissoved in a 200 ml of water. The concentration of the solid is amount of solute per volume of the solvent. The concnetration can be expressed as 2.5 grams sugar per liter water or 250 mg per 100 ml water.
Answer:
78.14 % B; 21.86 % H
Step-by-step explanation:
The formula of diborane is B₂H₆.
The masses of each element are:
2B = 2 × 10.81 = 21.62 u
6H = 6 × 1.008 = <u> 6.048 u
</u>
TOTAL = 27.67 u
% B = 21.62/27.67 × 100
= 78.14 %
% H = 6.048/ 27.67
= 21.86 %
Answer:
number of moles= 0.844 moles
Explanation:
Number of moles of Hydrogen atom = given mass / molar mass
given mass= 0.850 g
Molar mass= 1.007 g
number of moles= 0.850/1.007 = 0.844 moles
Answer:
Higher in the atmosphere temperature changes
Explanation: The tops of tall mountain might have ice or snow because it’s cooler in higher parts of the atmosphere.
