You have to find the number of moles of hydrogen gas produced when zinc and hydrochloric acid reacted. To do this you need to use the equation PV=nRT and solve for n.(n=PV/RT)
I would use 0.08206 atmL/molK For the gas constant so you need to convert 22°C into Kelvin, 748mmHg into atm, and 59.1mL into L.
22°C+273K=295K
748mmHgx(1atm/760mmHg)=0.984atm
59.1L=0.0591L
plugging everything in:
n=(0.0591Lx0.984atm)/(0.08206 atmL/molKx295K)
n=0.00240mol H₂
After finding the amount of hydrogen gas, you can find the volume of gas at STP by divide it by the molar volume of gas (22.4mol/L).
0.00240mol/22.4mol/L=1.07L H₂
The answer is 1.07L of hydrogen gas at STP was released from the reaction.
I hope this helps. Let me know if there was anything that was unclear to you.
Answer:
3.63m/s²
Explanation:
Given parameters:
Mass of box = 8kg
Net force = 29N
Unknown:
Acceleration of the box = ?
Solution:
To solve this problem, we use Newton's second law of motion which is stated as;
Force = mass x acceleration
Acceleration = 
= 
Acceleration = 3.63m/s²
Answer would be B. CNS the central nervous system
A cation (+) will be smaller than its neutral atom, while anion (-) will be larger than its neutral atom.
Answer:
MPR=90,36%
Explanation:
The recrystallization is a purification process where the solid to purify is dissolved in an appropriated dissolvent and then, changing the conditions the solubility changes and that solid (that was in solution before) precipitates and form crystals.
In this case, for boiling water 5.50 g of acetanilide could be dissolved and then cold the water, so the mass of crystals formed will be
The maximum percent recovery is then
