<em><u>examples of metalloids :
</u>Boron,Silicon ,Germanium are some metalloids ...
<u>what they do:
</u>they are used to form the semiconductors and these semiconductors are used in modern computer technology like in circuits ,chips and computer based gadgets... :) <u>
</u></em>
Answer:
The answer is D- make sure you give good rate
The density increases.
Explanation:
As you go deeper in depth, pressure increases. Density = mass/volume. The layers beneath us due to pressure get packed to the point of being very dense.
The molar mass of the compound is 68 g/mol.
<h3>What is the molar mass?</h3>
The Osmotic pressure can be obtained from the relationship;
π= iCRT
π= osmotic pressure = 28.1 mmHg or 0.037 atm
i = Vant Hoff factor = 1
C = concentration = ?
R = gas constant = 0.082 atmLK-1Mol
T = temperature = 20°c + 273 = 293 K
C = π/iRT
C = 0.037/1 * 0.082 * 293
C = 0.0015 M
Now;
Number of moles = C/V = 0.0015/100 * 10^-3
= 0.015 moles
Number of moles = mass/molar mass
Molar mass = mass/Number of moles = 0. 102 g/ 0.015 moles = 68 g/mol
Learn more about molar mass:brainly.com/question/22997914
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Answer: The volume of boron trifluoride gas that is collected is 18.6 L
Explanation:
According to the ideal gas equation:
PV=nRT
P = Pressure of the gas = 1 atm
V= Volume of the gas= ?
T= Temperature of the gas in kelvin =
R= Gas constant = 
n= moles of gas= 854 mmol = 0.854 mol (1mmol=0.001mol)
Thus volume of boron trifluoride gas that is collected is 18.6 L
