The number of neutrons does element X have if its atomic number is 24 and its mass number is 90 is 24.
Answer:
its the fourth one please mark as brainlest
Explanation:
Answer:
(a) 0.294 mol silver =
(b) 8.98 * 10-3 mol sodium chloride -
(c) 23.3 mol carbon dioxide =
(d) 0.310 mol nitrogen (N2) = 
Explanation:
In one mole there are
atoms/molecules
(a) 0.294 mol silver =
(b) 8.98 * 10-3 mol sodium chloride -
(c) 23.3 mol carbon dioxide =
(d) 0.310 mol nitrogen (N2) =
<u>Answer:</u> The molarity of saline solution is 0.909 M
<u>Explanation:</u>
We are given:
5.21 w/w % NaCl
This means that 5.21 grams of NaCl is present in 100 grams of solution
To calculate mass of a substance, we use the equation:

Density of solution = 1.02 g/mL
Mass of solution = 100 g
Putting values in above equation, we get:

To calculate the moalrity of solution, we use the equation:

Given mass of NaCl = 5.21 g
Molar mass of NaCl = 58.44 g/mol
Volume of solution = 98.04 mL
Putting values in above equation, we get:

Hence, the molarity of saline solution is 0.909 M