Which of the following statements is correct?

hclo3 is a stronger acid than hclo2 because the h-cl bond is weaker in hclo3 then in hclo2

h2s is a stronger acid than h2o because the h-s bond is weaker than the h-o bond

h3po4 is a stronger acid than h2so4 because there are more ionizable hydrogens in h3po4

hf is a stronger acid than hcl because f is more electronegative than cl

hclo2 is a weaker acid than hclo because hclo2 has more oxygen atoms

in theory, limestone is composed principally of the compound calcium carbonate - caco3, but in reality this compound is deposited in conditions involving a number of other compounds as impurities so it ends up being a mixture of many compounds.

hope this : -)

tony (lordcaos066)

the answer is either b or c

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.