Answer:
Explanation:1. A 2.650-g sample of a gas occupies a volume of 428 mL at 0.9767 atm and 297.3 K. What is its molar mass?
2.
a. A sample of nitrogen gas has a volume of 10.0 L at 2.50atm and 50.0℃. If the pressure is increased to 5.00 atm and the temperature decreases to 25.0℃, what volume does the gas occupy?
(a). 5.00L, (b).4.61L, (c).2.50L, (d).5.42L
b. Using the average bond energy, calculate the enthalpy of the above reaction. draw Lewis structures of the reactants and products first to determine the exact bond order. N2(g)+3H2(g)→2NH3(g)
<span>Cu + 2 AgNO</span>₃<span> = 2 Ag + Cu(NO</span>₃<span>)</span>₂
mole ratio:
1 mole Cu --------------> 2 moles Ag
? mole Cu --------------> 3.50 moles Ag
moles Cu = 3.50 x 1 / 2
moles Cu = 3.50 / 2
= 1.75 moles
Answer B
hope this helps!
Answer:
Explanation:Calculate the Energy Needed to Change a Solid Into a Liquid ... Heat of fusion is the amount of heat energy required to change the state of matter ... of fusion is: q = m·ΔHf; Note that the temperature does not actually change when ... Useful information: Heat of fusion of water = 334 J/g = 80 cal/g ... m = mass
Answer:
Explanation:
This question appear incomplete because of the absence of options. However, places where silver recovery would happen in the United States are states where huge mining of copper, lead, zinc or gold are been mined. Examples of such places include Arizona, California and Oregon; where copper (and some other metals in some cases like gold in Oregon) is heavily mined and silver is recovered as a byproduct.
The answer is Decomposition readction