3 years ago

What is the molarity of a solution formed by dissolving 155 mg of calcium nitrate in

Chemistry

1 answer:

kumpel [21]3 years ago

5 0

Answer:

9.45 × 10⁻³ M

Explanation:

Step 1: Given data

Mass of calcium nitrate (solute): 155 mg (0.155 g)

Volume of solution: 100. mL (0.100 L)

Step 2: Calculate the moles of solute

The molar mass of Ca(NO₃)₂ is 164.09 g/mol.

0.155 g × 1 mol/164.09 g = 9.45 × 10⁻⁴ mol

Step 3: Calculate the molarity of the solution

The molarity is equal to the moles of solute divided by the liters of solution.

M = 9.45 × 10⁻⁴ mol/0.100 L = 9.45 × 10⁻³ M

You might be interested in

Which explains the change in ionization energy that occurs between removing the first and second electron from an Atom

Mars2501 [29]

The ionization energy increases because the ratio of the protons to electrons increases. It is quantitatively expressed in symbols as X + energy → X+ + e−.

8 0

3 years ago

Read 2 more answers

Question 15 How many grams of NaCl are required to make 500.0 mL of a 1.500 M solution? 58.40 g 175.3 g 14.60 g 43.83 g

ExtremeBDS [4]

Hi!

To make 500 mL of a 1,500 M solution of NaCl you'll require 43,83 g

To calculate that, you will need to use a conversion factor to go from the volume of the 1,500 M solution to the required grams. For this conversion factor, you'll use the definition for Molar concentration (M=mol/L) and the molar mass of NaCl. The conversion factor is shown below:

$gNaCl=500mLsol* \frac{1L}{1000 mL}* \frac{1,500 mol NaCl}{1Lsol}* \frac{58,4428 g NaCl}{1 mol NaCl} \\ =43,83gNaCl$

Have a nice day!

4 0

3 years ago

You have 100 milliliters of a 0.50 M MgBr2 solution and dilute it to a total volume of 200 milliliters. What is the molarity of

slamgirl [31]

The answer is 0.25 M

Use the equation C1V1=C2V2
(.5)(100)=x(200)
x=0.25

3 0

3 years ago

If an atom loses a nuetron, what happens to the overall electric charge

Dimas [21]

Absolutely nothing a neutron has a neutral charge

6 0

3 years ago