The correct option is COVALENT BONDS.
A Lewis acid is defined as a substance which accept a pair of electron while a Lewis base refers to a substance that donate an unshared pair of electrons to another chemical specie with which it shared the donated pair of electrons.
Lewis acid and Lewis base react together to form salt and water. This type of reaction is called neutralization reaction. The neutralization reaction of Lewis acid and Lewis base involves electron pairs transfer, thus, there is an increase in the number of covalent bonds during this reaction.
Answer: AZ is the insoluble choice.
Explanation:
Z is an anion of a weak electronegative element. Hence, it bounds lightly with the highly electropositive cation A to form AZ.
AZ is not as ionic as AX, AY, BX, BY and BZ, so it is insoluble in water and yields precipitate on reaction with the salt of a weaker metal.
Answer:
The glass of water weigh once the antacid pill has dissolved will be less than the 179 grams due to evolution of carbon dioxide.
Explanation:
Mass of effervescent antacid pill = 4.00 g
Mass of water = 85 g
Mass of glass = 90 g
Total mass of the substances together : 4.00 g + 85 g + 90 g = 179 g
Effervescent antacid pill , moment it get dissolved in water carbon dioxide gas is evolves and escape from the solutions.
This means that mass of the weight of the glass of water with antacid dissolved in it will be less than 179 grams.
The average atomic mass of this new element X is 43.45
HOW TO CALCULATE AVERAGE ATOMIC MASS:
- The average atomic mass of an element can be calculated by the following steps:
- multiplying the atomic mass of each isotope with its relative abundance
- Then sum the results for each isotope
According to this question; a new element X is found and in the sample:
- 70% is X-43
- 25% is X-44
- 5% is X-47
The average atomic mass of element X is calculated thus:
X-43: 70/100 × 43 = 30.1
X-44: 25/100 × 44 = 11
X-47: 5/100 × 47 = 2.35
Next, we sum the results as follows:
= 30.1 + 11 + 2.35
= 43.45
- Therefore, the average atomic mass of this new element X is 43.45.
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