<span>0.929 g/ml
Density in this case is defined as mass per volume. Or in other words, mass divided by volume. So you simply divide 929 grams by 1000 ml. Giving
929 g / 1000 ml = 929/1000 g/ml = 0.929 g/ml</span>
Answer:
1.28 M
Explanation:
Step 1: Given data
Mass of luminol (solute): 17.0 g
Volume of water: 75.0 mL (this is also the volume of solution)
Step 2: Calculate the moles corresponding to 17.0 g of luminol
The molar mass of luminol is 177.16 g/mol.
17.0 g × 1 mol/177.16 g = 0.0960 mol
Step 3: Calculate the molarity of the solution
We will use the definition of molarity
M = moles of solute / liters of solution
M = 0.0960 mol / 0.0750 L = 1.28 M
Answer:
Lemon juice has lowest pH.
Explanation:
pH is the negative log of hydrogen ion concentration. By increasing the Hydrogen ion concentration pH will decrease.
pH = -log [H⁺]
According to pH scale,
The pH of 7 is consider neutral. The pH below the 7 is consider acidic and above the 7 is basic.
The sodium hydroxide is strongest base because it fully dissociate into ions.
It dissociate to gives the sodium and hydroxyl ions and solution became more basic.
NaOH → Na⁺(aq) + OH⁻(aq)
Its pH is 12. It is also known as caustic soda.
The pH of blood is vary from 7.35 - 7.45. it is slightly alkaline.
The pH of lemon juice is ranging between 2-3.
The pH of tap water is ranging between 6-8.5.
From above given information it can be noticed that lemon juice have lowest pH i.e 2-3. It is acidic, because its pH is less than 7.