<u>Answer:</u> The molarity of NaCl solution is 0.0489 M
<u>Explanation:</u>
Molarity is defined as the amount of solute expressed in the number of moles present per liter of solution. The units of molarity are mol/L. The formula used to calculate molarity:
.....(1)
We are given:
Given mass of NaCl = 0.8 g
Molar mass of NaCl = 58.44 g/mol
Volume of the solution = 280 mL
Putting values in equation 1, we get:
Hence, the molarity of NaCl solution is 0.0489 M
The only thing you need to do to solve this task is to find :ΔS° and Δ<span>H</span>°<span><span>
</span></span>After that, just use this formula:
ΔG=ΔH°−TΔS°
Just calculate all of them, you have all the index.
Answer:
<h2>Density = 2.64 g/mL</h2>
Explanation:
The density of a substance can be found by using the formula
From the question
mass of rock = 12.947 g
Volume of rock = final volume of water - initial volume of water
Volume = 46.2 mL - 41.3 mL = 4.9 mL
Substitute the values into the the above formula and solve for the density
That's
We have the final answer as
<h3>Density = 2.64 g/mL</h3>
Hope this helps you
Answer:
all of these are properties of metalloids