Metalloids are all solid at room temperature<span>. Some metalloids, such as silicon and germanium, can act as </span>electrical<span> conductors under the right conditions, thus they are called semiconductors. Silicon, for example, appears lustrous but is not malleable or </span>ductile<span> (it is brittle - a characteristic of some nonmetals).
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Answer:
Acids: HNO₃ and HI
Base: KOH
Explanation:
For the Arrhenius concept, acid is a substance that, in water, produces the hydrogen ion (H⁺), and base in the substance that, in water, produces the hydroxyl ion (OH⁻).
For the first reaction then KOH must produce OH⁻ so its a base, and HNO₃ must produce H⁺ so it's an acid.
For the second one, HI must produce H⁺ so it's an acid. For the concept of Arrhenius, (CH₃)₃N can't be classified as a base or as an acid.
<span>21.6 grams
The balanced equation for the reaction is
Cu + 2AgNO3 ==> 2Ag + Cu(NO3)2
So you can easily determine that for each mole of copper used, 2 moles of silver are produced. So let's lookup the atomic weights of copper and silver.
Atomic weight copper = 63.546
Atomic weight silver = 107.8682
Moles copper = 6.35 g / 63.546 g/mol = 0.099927611 mol
Since we'll produce 2 moles of silver per mole of copper used, we get
0.099927611 mol * 2 = 0.199855223 mol
And to get the mass, just multiply by the atomic weight of silver. So
0.199855223 * 107.8682 = 21.55802316 g
Finally, round to 3 significant figures, giving 21.6 g.</span>
Answer:
1) The value of Kc : (C.) remains the same
2) The value of Qc : (A.) is greater than Kc
3) The reaction must : (B.) run in the reverse direction to reestablish equilibrium.
4) The number of moles of Br2 will : (B.) decrease
Explanation:
Value of concentration equilibrium constant Kc depends only on temperature. Since temperature remains constant, therefore, Kc remains constant. Decrease in volume means increase in pressure. Increase in pressure favors the side with less gaseous species. Hence, increase in pressure will favor the reverse reaction towards reactants.
Answer:
I screenshot and expained here
https://screenshot.best/A7QIKV.lnk
Explanation:
