<u>Answer:</u> The molar mass of molecule X is 162.5 g/mol
<u>Explanation:</u>
We are given:
0.9 % of NaCl
This means that 0.9 grams of NaCl is present in 100 grams of solution
5 % of molecule X
This means that 5 grams of molecule X is present in 100 grams of solution
To calculate the concentration of solute, we use the equation for osmotic pressure, which is:
Or,
where,
i = Van't hoff factor
R = Gas constant =
T = temperature of the solution
According to the question:
Osmotic pressure of both the solutions are same.
So, the equation becomes:
where,
Putting values in above equation, we get:
Hence, the molar mass of molecule X is 162.5 g/mol
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Answer:
Explanation:
Remember that a mole is equal to Avogadro's number: 6.022*10²³ atoms. Also, remember that an atom is made up of protons, neutrons, and electrons. Each element has a different amount of each.
If an element has more of these particles in 1 atom, then the atomic mass will be greater, ultimately making the molar mass (mass of 1 mole) greater.
Silicon has 14 protons, electrons, and neutrons, making its atomic mass 28.085 amu and its molar mass 28.085 grams. However, carbon only has 6 of each particle, so its atomic mass is smaller at 12.011 amu and molar mass is 12.011 grams.
Answer:
The heavier isotope is 48.2 % (option d)
Explanation:
Step 1: Data given
Atomic weight of silver = 107.868 amu
Isotopes of silver:
107Ag = 106.904 amu
109Ag = 108.905 amu
Step 2: Calculate the percentages
107.868 = 106.904 * x + 108.905 *y
x+y = 1 ⇒ x = 1 - y
107.868 = 106.904 (1 - y) + 108.905*y
107.868 = 106.904 - 106.904y + 108.905y
0.964 = 2.001y
y = 0.4818
x = 1 - 0.4818 = 0.5182
Percentage 109Ag = 48.18 %
Percentage 107Ag = 51.82 %
The heavier isotope is 109Ag. Its percentage is 48.18 ≈ 48.2 %
Hormones travel through the body by using blood streams, such as veins. The hormones then get to the target cell by moving through the liquids surrounding the cells. They then change how the cell works, thus changing the body.