Answer:
V₁ = 0.342 M
Explanation:
Given data:
Volume of HClO₄ = 15.00 mL
Volume of NaOH = 25.64 mL
Molarity of NaOH = 0.2000 M
Molarity of HClO₄ = ?
Solution:
Formula:
M₁V₁ = M₂V₂
V₁ = M₂V₂ /M₁
V₁ = 0.2000 M ×25.64 mL /15.00 mL
V₁ = 5.128 M. mL /15.00 mL
V₁ = 0.342 M
Hey there!
The more energy a substance is, the more movement it has.
The energy of a substance determines its state of matter.
From least to most energy, it goes solid, liquid, gas.
So it needs to be going from a lower energy state to a higher energy state.
The only one that goes from a lower energy state to a higher energy state is C. H2O (l) --> H2O (g).
Hope this helps!
Answer: Glassware C
Explanation:
According to moalrity equation:
= Molarity of stock solution = 4.50 M
= volume of stock solution = ?
= molaity of diluted solution = 1.35 M
= volume of diluted solution = 250.0 ml
A volumetric flask is more accurate for making solutions than a beaker or erlenmeyer flask and hence to measure 75.0 ml of stock solution , we use 250 ml of volumetric flask.
Thus 75.0 ml of stock is pipetted out using pipette and put into a volumetric flask of 250 ml and water is added till the mark reaches 250 ml.
A volumetric flask is more accurate for making solutions than a beaker or erlenmeyer flask and hence to measure 75.0 ml of stock solution , we use 250 ml of volumetric flask.
In ionic bonding, an arrow is often drawn on the diagram to show the direction the electrons move to form the ions.
