Answer:
The molar amount of gas.
Explanation:
According to the ideal gas law,
PV = nRT
P = pressure of gas
V = volume of gas
n = number of moles of gas
R = ideal gas constant
T= temperature of gas
When pressure, volume and temperature of gas is known the molar amount of gas can be determine by using above formula.
For example:
P = 1.2 atm
R = 0.0821 atm. L.mol⁻¹ .k⁻¹
T = 293 K
V = 2 L
n = ?
Solution:
PV = nRT
1.2 atm × 2L= n × 0.0821 atm. L.mol⁻¹ .k⁻¹ × 293 K
n = 1.2 atm × 2L / 0.0821 atm. L.mol⁻¹ .k⁻¹ × 293 K
n = 0.1 mol
Answer:
The data will be error free and more correct.
Explanation:
The data will show no error while testing the adsorptive properties of a new material if no centrifuge method is not used because there is no need for centrifuge method. For determining the adsorptive properties of a new material, we can measure the data after dissolving . Adsorption is the adhesion of atoms, ions or molecules from a gas, liquid or dissolved solid to a surface while on the other hand, Centrifugation is the process where a mixture is separated from one another through fast spinning. so for determining the adsorptive properties, no centrifugation process is required and we get the correct data without centrifugation.
Answer:
Explanation:
All the cobalt in the sample is in the precipitate, so you need to determine the amount of cobalt in the precipitate.
<u>1. Calculate the molar mass of CoHg(SCN)₄</u>
Atom Number of atoms Atomic mass Product
g/mol g/mol
Co 1 58.933 58.933
Hg 1 200.59 200.59
S 4 32.065 128.26
C 4 12.011 48.044
N 4 14.007 56.028
=========
Molar mass: 491.855
<u>2. Set a proportion</u>
- 58.933g of Co / 491.855 g of compound = x / 0.1102 g of compound
Clear and compute:
- x = 0.1102 × 58.933 / 491.855 g of Co
Round to four significant figures: 0.01320g of cobalt ← answer
Answer: The average kinetic energy of water at 
is 
.
Explanation:
Given: Temperature = 
Kinetic energy is the energy acquired by the molecules of a substance due to its motion.
Formula to calculate average kinetic energy is as follows.
where,
T = temperature
k = Boltzmann constant = 
Substitute the value into above formula as follows.
Thus, we can conclude that the average kinetic energy of water at is .
The structure is in the attached photo. I’ve drawn the compound and it’s skeletal compound but they are of the same molecule.
