<h2>Answer : Option A) Field lines enter Earth near the North Pole.</h2><h2>Option D) Field lines circle Earth from east to west. and </h2><h2>
Option E) A compass can lead a hiker to the geographic North Pole.</h2><h3>Explanation :</h3>
A) The earth's magnetic field lines are observed to enter near the north pole because it is the magnetic pole; which is the point were the magnetic field lines are vertical and enter the earth.
D) The magnetic field line are believed to start from east and end in west similar to the meridians.
E) The Earth is considered as a magnet which seems to interact with other magnets in a way, so the north end of a compass magnet is drawn to align with the Earth's magnetic field.
Answer:
Rate of Ar= 1.65 x mol/h
Explanation:
Here we'll use Graham's Law where
R= rate of effusion and M= molar mass
Let's plug in what we know.
You could switch them where Xe is M1 (on the bottom) instead of M2, but I find it easier when the unknown is R1, where it acts like a whole number. It makes the algebra part of the equation easier.
Let's solve for R1.
R1= 1.089 x
R1= 1.65 x mol/h
Answer:
Mass of CaBr₂ = 179.9 g
Explanation:
Given data:
Volume of CaBr₂ solution = 450.0 mL (450/1000 = 0.45 L)
Molarity of solution = 2.00 M
Mass of CaBr₂ = ?
Solution:
Formula:
Molarity = number of moles / volume of solution in L
Now we will put the values.
2.00 M = number of moles / 0.45 L
Number of moles = 2 M × 0.45 L
Number of moles = 0.9 mol ( M = mol/L)
Mass of CaBr₂:
Mass of CaBr₂ = number of moles × molar mass
Mass of CaBr₂ = 0.9 mol × 199.89 g/mol
Mass of CaBr₂ = 179.9 g
Data:
m = 35g
Q = 48 j
T1 = 298K
T2 = 313K
Cs = ?
Fórmula: Q = m*Cs*(T2 - T1) => Cs = Q / [m (T2 - T1)]
Cs = 48 j / [35g (313K - 298K] = 0.0914 j / g*K = 91.4 j / kg*K
<u>Answer:</u> The total pressure inside the container is 77.9 kPa
<u>Explanation:</u>
Dalton's law of partial pressure states that the total pressure of the system is equal to the sum of partial pressure of each component present in it.
To calculate the total pressure inside the container, we use the law given by Dalton, which is:
We are given:
Vapor pressure of oxygen gas, = 40.9 kPa
Vapor pressure of nitrogen gas, = 23.3 kPa
Vapor pressure of argon, = 13.7 kPa
Putting values in above equation, we get:
Hence, the total pressure inside the container is 77.9 kPa