Answer:
CO2 is a trigonal planar.
The highest temperature<span> ever recorded on Earth was 136 Fahrenheit (58 Celsius) in the Libyan desert. The coldest </span>temperature<span> ever measured was -126 Fahrenheit (-88 Celsius) at Vostok Station in Antarctica.
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Vacuum filtration is a process of separating the solid from liquids. A Buchner funnel and side arm flask is used for this process. The filter paper is placed on the Buchner funnel, the size of the filter paper should fit on the funnel and should cover all the holes. To obtain the correct yield of the solid product from the vacuum filtration process, there should be no gaps around the edges of the filter paper as if there are any gaps around the edges of the filter paper, the solid precipitate will pass through the gaps with liquid and thus, results in the low percentage yield of the solid compound.
Hence, to obtain the correct yield percentage of the solid compound there should be no gaps around the edges of the filter paper during the vacuum filtration.
Answer:
121 g/mol
Explanation:
To find the molar mass, you first need to calculate the number of moles. For this, you need to use the Ideal Gas Law. The equation looks like this:
PV = nRT
In this equation,
-----> P = pressure (atm)
-----> V = volume (L)
-----> n = moles
-----> R = constant (0.0821 L*atm/mol*K)
-----> T = temperature (K)
Because density is comparing the mass per 1 liter, I am assuming that the system has a volume of 1 L. Before you can plug the given values into the equation, you first need to convert Celsius to Kelvin.
P = 1.00 atm R = 0.0821 L*atm/mol*K
V = 1.00 L T = 25.0. °C + 273.15 = 298.15 K
n = ? moles
PV = nRT
(1.00 atm)(1.00L) = n(0.0821 L*atm/mol*K)(298.15 K)
1.00 = n(0.0821 L*atm/mol*K)(298.15 K)
1.00 = (24.478115)n
0.0409 = n
Now, we need to find the molar mass using the number of moles per liter (calculated) and the density.
0.0409 moles ? grams 4.95 grams
---------------------- x ------------------ = ------------------
1 L 1 mole 1 L
? g/mol = 121 g/mol
**note: I am not 100% confident on this answer
Neurons contribution MASS to the atom but not Charge to the nucleus !!