Answer: Beta particles cannot penetrate very far into solids because they <span><u>have no mass.
</u>
Reason<u>:
</u>Penetrating power of particle depending upon the velocity and mass of particle. Greater the mass and velocity. Higher will be the penetrating power. In case of Beta particles, they are electrons. Mass of an electron is 9.1 X </span>
Kg. Due to such negligible mass, they have very low penetrating power. <span /><span><u>
</u></span>
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
Answer:
The correct option is: B. 13g
Explanation:
Given: Molar mass of iron (II) sulfate: m = 260g/mol,
Molarity of iron (II) sulfate solution: M = 0.1 M,
Volume of iron (II) sulfate solution: V = 500 mL = 500 × 10⁻³ = 0.5 L (∵ 1L = 1000mL)
Mass of iron (II) sulfate taken: w = ? g
<em>Molarity</em>: 
Here, n- total number of moles of solute, w - given mass of solute, m- molar mass of solute, V- total volume of solution in L
∴ <em>Molarity of iron (II) sulfate solution:</em> 
⇒ 
⇒ 
⇒ <em>mass of iron (II) sulfate taken:</em> 
<u>Therefore, the mass of iron (II) sulfate taken for preparing the given solution is 13 g.</u>
Answer:
It becomes a supersaturated solution
Explanation:
Due to the fact that the crystals can no longer dissolve and adding more solute to the same temperature will continue not to dissolve the crystals making it more and more saturated leading to supersaturated solution
