1) general word equation=acid + metal= salt + hydrogen gas
chemical/balanced equation= 2HCl+Mg=MgCl2+H2
2)The gas thus formed is an effervescent carbon di oxide when calcium chloride reacts with hydrochloric acid. the carbon di oxide gas also acts as an extinguisher for fires. Hence the burning candle is extinguished.
1) metal reacts with acid to produce hydrogen gas and salt
an example of the reaction will be 2Na+ 2HCl —> 2NaCl +H2
2) we know the metal in compound A is calcium as one of the compound formed is calcium chloride.
the gas that’s causing effervescent effect is CO2 as CO2 is non polar and does not mix with water hence appears as bubbles. there are 2 possible calcium compounds that can produce CO2 with addition of HCl.
those compounds are calcium carbonate (CaCO3) and Calcium Bicarbonate ( Ca(HCO3)2 )
reaction for both possible compounds - CaCO3 + 2HCl —> CaCl2 + H2O + CO2 - Ca(HCO3)2 + 2HCl —> CaCl2 + 2H2O +2CO2
Isotopes of any given factor all incorporate the equal variety of protons, so they have the identical atomic wide variety (for example, the atomic wide variety of helium is usually 2). Isotopes of a given factor include exceptional numbers of neutrons, therefore, special isotopes have special mass numbers.
