Answer: There is 125 mL of a 2.0 M CuCl2 solution are needed to make 500 mL of a 0.5 M solution
Explanation:
Given: = 2.0 M, = ?
= 0.5 M, = 500 mL
Formula used to calculate the volume is as follows.
Substitute the values into above formula as follows.
Thus, we can conclude that there is 125 mL of a 2.0 M solution are needed to make 500 mL of a 0.5 M solution.
Answer:
pressure of the oxygen gas is 7.88atm
Explanation:
Moles of oxygen in cylinder = 2.80 mol
volume=8.58L
temperature=294K
molar gas constant(R)= 0.0821 L atm / (mol K)
The pressure is calculated using ideal gas law:
PV = nRT
making Pressure subject of the formula
P
=
nRT
/V
=
2.80× 0.0821 ×294 /8.58 L
P = 7.88 atm
D) Physical Change, I would argue, because you can reverse this change by boiling off (evaporating) the water. But there are arguments for both physical and chemical change being what occurs.
A physical change results in a change of the material's appearance, but no new chemical products result. A chemical change involves a chemical reaction, with new substances produced as a result of the change.
Answer: After losing the presidential reelection, Carter returned to Georgia and founded.
A. not C.
SLOW
Explanation:
Answer:
The value of K at this temperature = 2.25
Explanation:
According to question the equilibrium reaction is
H₂(g) + I₂(g) ⇄ 2 HI(g)
Initial concentration 2 2 8
At equilibrium 2 + 2x 2 + 2x 8 - 2x
At equilibrium concentration of HI changes to become 6 Molar
So 8 - 2x = 6
or, x = 1
So concentration of H₂ = 2 + 2 x 1 = 4 molar
concentration of I₂ = 2 + 2 x 1 = 4 molar
Kc =
⇒ Kc =
⇒ Kc = = 2.25