Which element is a metalloid? Check all that apply. selenium (Se) polonium (Po) silicon (Si) iodine (I) tin (Sn) antimony (Sb) p
hosphorus (P)
2 answers:
The metalloids are highlighted in the table.
Of the elements in the question, the following are metalloids...
<span>antimony (Sb)
</span><span>silicon (Si)
</span><span>polonium (Po)
</span>
Of the elements in the question, the following are metalloids...
<span>antimony (Sb)
</span><span>silicon (Si)
</span><span>polonium (Po)
</span>
Answer: Polonium (Po), Silicon (Si), Antimony(Sb)
Explanation: Metalloids are the elements which exhibits some properties of both metals and non-metals. They are generally called as semi-metal. There are in total 7 metalloids in whole periodic table. They are:
Boron (B), Silicon (Si), Germanium (Ge), Arsenic (As), Antimony (Sb), Telurium (Te) and Polonium (Po).
From, the list and periodic table attached, it is visible that only Silicon, Polonium and antimony are the metalloids from the elements given.
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Answer:
Explanation:
Given:
Pressure = 745 mm Hg
Also, P (mm Hg) = P (atm) / 760
Pressure = 745 / 760 = 0.9803 atm
Temperature = 19 °C
The conversion of T( °C) to T(K) is shown below:
T(K) = T( °C) + 273.15
So,
T₁ = (19 + 273.15) K = 292.15 K
Volume = 0.200 L
Using ideal gas equation as:
where,
P is the pressure
V is the volume
n is the number of moles
T is the temperature
R is Gas constant having value = 0.0821 L.atm/K.mol
Applying the equation as:
0.9803 atm × 0.200 L = n × 0.0821 L.atm/K.mol × 292.15 K
⇒n = 0.008174 moles
From the reaction shown below:-
1 mole of react with 2 moles of
0.008174 mole of react with 2*0.008174 moles of
Moles of = 0.016348 moles
Volume = 13.4 mL = 0.0134 L ( 1 mL = 0.001 L)
So,