Answer: The mole ratio of zinc to zinc sulfate is 1:1.
Explanation:
According to reaction,1 mole of zinc reacts with 1 mole of sulfuric acid to give 1 mole zinc sulfate and 1 mole of hydrogen gas .
So, the mole ratio of zinc to zinc sulfate is:
Hence, the mole ratio of zinc to zinc sulfate is 1:1.
The correct answer is option 2. One way of expressing concentration is by expressing it by parts per million or ppm. It is calculated by dividing the grams of solute and the grams of the solution, and the result is multiplied by 1 000 000. Parts per million is equal to 1 milligram of solute per kilogram of solution.
7.5 billion
9.0 billion
6.6 billion
Answer:
The correct answer is option B, 7.5 billion
Explanation:
As per the US Census Bureau, the world population in year 2016 was approximately US
7346235000. As per the UN estimate there were 7 billion people on planet earth in 2011 and World Bank estimates say that there were 7 billion people in year 2012
The top most populated countries in coming year (along with their population) would be
China 1,367,485,388
India 1,251,695,584
United States 321,368,864
TRUE
FALSE
b. H2SO4.
c. H3PO4.
d. HCl.
Answer: Option (d) is the correct answer.
Explanation:
An acid which gives only one hydrogen ion or ions upon dissociation in an aqueous solution is known as a monoprotic acid.
Whereas when an acid gives two hydrogen or ions upon dissociation in an aqueous solution is known as a diprotoc acid.
And when an acid gives three hydrogen or ions upon dissociation in an aqueous solution is known as a triprotoc acid.
Therefore dissociation of the given acids in an aqueous solution will be as follows.
Hence, we can conclude that out of the given options, HCl is the monoprotic acid.
Monoprotic acid are acids having only one hydrogen atoms after dissociation into ions from its compound. The monoprotic acid from among the following is HCl. The answer is letter D. HCl → H+ + Cl-. Note that there is only one H+ ion upon dissociation.