Answer:
27.53 mL.
Explanation:
- Firstly, we need to calculate the no. of moles of HCl using the general law of ideal gas: <em>PV = nRT.</em>
where, P is the pressure of the gas in atm (P = 1.0 atm at STP).
V is the volume of the gas in L (4.48 L).
n is the no. of moles of the gas in mol.
R is the general gas constant (R = 0.0821 L.atm/mol.K),
T is the temperature of the gas in K (T = 273 K at STP).
<em>∴ n = PV/RT </em>= (1.0 atm)(4.48 L)/(0.0821 L.atm/mol.K)(273 K) = <em>0.1998 mol ≅ 0.12 mol.</em>
<em>∴ The concentration of 0.12 mol HCl in 400.0 mL water = n/V = </em>(0.12 mol)/(0.4 L) <em>= 0.499 ≅ 0.50 mol/L.</em>
- At equivalence: the no. of millimoles of HCl = the no. of millimoles of Sr(OH)₂.
<em>(MV)HCl = (xMV) Sr(OH)₂</em>
∴ The volume of Sr(OH)₂ = (MV)HCl/(xM) Sr(OH)₂ = (25.0 mL)(0.50 mol/L)/(2)(0.227 M) = 27.53 mL.
Answer:
two atoms share 1 pair of valenece electrons
Explanation:
because double bond is created when each of two atoms share 2 valenece electrons (1 pair of electrons = 2 electrons)
Answer: DADDY CHILL
Explanation: MY GIRL LEFT ME FOR A LIGHT SKIN WITH PERM
CO₂ + H₂O -------> H₂CO₃
moles of CO₂ =
=
= 11.997 mol
mole ratio of CO₂ : H₂O = 1 : 1
∴ moles of H₂O = (`11.997 mol ) * 1
= 11.997 mol
≈ 12 mol
Answer: B. Tornado
Explanation: <u>A tornado is a violent rotating column of air extending from a thunderstorm to the ground. The most violent tornadoes are capable of tremendous destruction with wind speeds of up to 300 mph. They can destroy large buildings, uproot trees and hurl vehicles hundreds of yards. They can also drive straw into trees.</u>
