You will use the formula PV=nRT
P = pressure
V = volume
n = moles
R = gas constant
T = Temperature
Since 21.4g of Ar (Argon) is given this will be divided by the molar mass of Ar to give you the number of moles. Mass of Ar is 40g so
21.4g/40g = 0.54 moles of Argon
Then you just change Celsius to Kelvin by adding 273 to 12.5 which will be
12.5 + 273 = 285.5 K
(The formula for changing C to K is
X°C + 273 = K)
Now with moles and temperature in K you can plug all your values into PV=nRT to find volume so
(1.25atm)V = (0.54moles)(0.0821)(285.5K)
(0.0821 is the gas constant R when using atm, Liters, moles, and kelvin; this should always be given by your teacher)
Multiply
1.25v= 12.66
Divide 1.25 on both sides
V= 12.66/1.25 —> 10.13L
Your answer should be approximately 10.13L
Answer: F. Electron pair acceptor
Explanation:
A Lewis acid can be properly defined as any substance such as H+ (hygrogen ion) that can accept a pair of electron.
While a Lewis base is any substance such as (OH-) that can donate a pair of electron.
In the neutralization reaction between an acid ( H+ ) and a base (OH-). Hydrogen ion (H+ ) is the Lewis acid because it accepts an electron pair from (OH-).
Other examples of Lewis acid are; Mg2+, K+
C2H6O + O2 ---> C2H4O2 + H2O
using the molar masses:-
24+ 6 + 16 g of C2H6O produces 24 + 4 + 32 g C2H4O2 (theoretical)
46 g produces 60g
60 g C2H4O2 is produced from 46g C2H6O
1g . .................................46/60 g
700g ................................. (46/60) * 700 Theoretically
But as the yield is only 7.5%
the required amount is ((46/60) * 700 ) / 0.075 = 7155.56 g
= 7.156 kg to nearest gram. Answer
Hz is the measurement of a frequency equal to one cycle per second. since this wave shows 9 peaks and valleys or "cycles" your answer would be 3 Hz due to the fact that the length of time is 3 seconds. (3 cycles per second X 3 seconds.)
Answer:
160m/s
Explanation:
To find V Use the following formula V= F*W
V= Velocity F= Frequency W= Wavelength
V=20*8
=160m/s