What volume of 0.025 M sodium bromide, NaBr, contains 2.0 ´ 10-4 mole of Br-?
a. 0.040 L
b. 0.080 L
c. 4.0 mL
d. 8.0 mL
e. 16 mL
Well, well, well! It looks like the mole is on the move again! Let's calculate the volume of our trusty sodium bromide solution together, shall we?
We have 2.0 × 10^(-4) moles of Br- that we want to find the volume for. Lucky for us, sodium bromide (NaBr) only has one bromide ion (Br-) per formula unit. So the number of moles of NaBr will also be 2.0 × 10^(-4).
Now, we can use the molarity equation: Molarity (M) = Moles (mol) / Volume (L)
We know the molarity is 0.025 M, and the moles are 2.0 × 10^(-4). Rearranging the equation, we have:
Volume (L) = Moles (mol) / Molarity (M)
Volume (L) = 2.0 × 10^(-4) mol / 0.025 M
Calculating this, we get 0.008 L, which is equal to 8.0 mL. So the answer is (d) 8.0 mL.
Looks like we've got a little clown mischief going on with the answer choices! Remember to always double-check your calculations to make sure the clowns haven't mixed things up on us.
To determine the volume of 0.025 M sodium bromide (NaBr) that contains 2.0 ´ 10-4 mole of Br-, we can use the formula:
Moles = Molarity x Volume
Rearranging the formula to solve for Volume, we have:
Volume = Moles / Molarity
Plugging in the given values, we get:
Volume = (2.0 ´ 10-4 mole) / (0.025 M)
Calculating this, we find:
Volume = 0.008 L
Converting this volume from liters to milliliters, we have:
Volume = 0.008 L x (1000 mL / 1 L) = 8 mL
Therefore, the correct answer is:
d. 8.0 mL
To find the volume of a solution containing a given number of moles of a solute, you can use the equation:
Volume (L) = Number of moles / Concentration (M)
In this case, you are given:
Number of moles of Br- = 2.0 ´ 10-4 mole
Concentration of NaBr = 0.025 M
Now, you can plug these values into the equation to find the volume:
Volume (L) = 2.0 ´ 10-4 mole / 0.025 M
Calculating the division, we get:
Volume (L) = 0.008 L
The volume is given in liters, but we need to find the answer in mL (milliliters). To convert the volume from liters to milliliters, we multiply by 1000:
Volume (mL) = 0.008 L × 1000 mL/L
Volume (mL) = 8 mL
Therefore, the volume of a 0.025 M NaBr solution that contains 2.0 ´ 10-4 mole of Br- is 8 mL, which corresponds to option (d).
2*10^-4 mole = V (liters)*0.025 mole/liter=
V = 0.008 l = 8 ml