An ion must be charged either positively or negatively
A is incorrect - HCI is a formula that represents Hydrochloric Acid
B is incorrect - H20 is a formula that represents Water
C is correct - H3O+1 is a formula that represents Hydronium Ion; the ion is also positively charged
The answer is C.
The radius of the aluminum cylinder is 0.258cm
HOW TO CALCULATE VOLUME OF A CYLINDER:
- The volume of a cylinder can be calculated by using the formula below:
V=πr²h
Where;
V = volume (cm³)
r = radius (cm)
h = height (cm)
- To calculate the radius of the aluminum cylinder, the volume is required. The volume can be calculated using the formula as follows:
Volume = mass ÷ density
Volume = 1.22 ÷ 2.70
Volume = 0.452 cm³
- The radius can be calculated with the volume and height known as follows:
r = √v/πh
r = √0.452 ÷ (3.142 × 2.16)
r = √0.452 ÷ 6.78
r = √0.067
r = 0.258cm
Therefore, the radius of the aluminum cylinder is 0.258cm.
Learn more: brainly.com/question/16134180?referrer=searchResults
HI and I⁻ is the acid-conjugate base pair.
<h3>What is acid and conjugate base pair?</h3>
According to Bronsted-Lowry definition of acid and base, those pair which are differ in the single no. of proton or H⁺ ion is known as acid and conjugate base pair or base and conjugate acid pair.
Given chemical reaction is:
HI + H₂O → H₃O⁺ + I⁻
Here, HI = acid,
H₂O = base,
H₃O⁺ = conjugate acid and
I⁻ = conjugate base
Hence, option (d) is correct i.e. HI & I⁻ is the acid-conjugate base pair.
To know more about the acid-conjugate base pair, visit the below link:
brainly.com/question/14971866
Answer: Water is SUPER soluble and regarded as an universal solvent because it is polar in nature and dissolves most inorganic solutes and some polar organic solutes to form aqueous solutions.
Explanation:
WATER is a substance which is composed of the elements such as hydrogen and oxygen that are combined in the ratio of 2:1. The physical properties of water include:
--> it is a colourless, odourless and tasteless liquid and
--> the boiling point of water is 100°C(this is due to the presence of hydrogen bonding).
The solubility of a solute in a solvent at a particular temperature is the maximum amount of solute in moles or grams that will saturate 1000 dm³ or grams of the solvent.
Water is regarded as a universal solvent BECAUSE it is capable of dissolving many substances. This solubility helps maintain different processes in life such as acting as the solvent which helps cells transport and use substances like oxygen or nutrients.