The element named TECHNATIUM
Symbol is Tc
98.9063 g/mol
Discovery year 1937
Founders are
Emilio Geno Segre
Carlo Pierrier
Answer:
Calcium carbonate reacts with hydrochloric acid to form carbon dioxide gas. 2HCl (aq) + CaCO 3(s) CaCl 2 (aq) + CO 2(g) + H 2 O (l).
Answer:
x=1.4*10^9
or choice a
Hope this helps and please mark me brainliest! <3 >//<
Mass of the substance = 360 gm
Volume of the substance = 7.5 cm^3
Now we know that
Density = Mass/Volume
= 360/7.5 gm/cm^3
= 48 gm/cm^3
So the density of the substance given in the question is 48 gm/cm^3.
. I hope that you have
understood the procedure by which the density of any substance can be easily
determined and also got the answer you were looking for. By following this
method you can easily determine the density of any substance without requiring
any help.
Answer:
The correct option is the A
Explanation:
Like oxygen is more electronegative than hydrogen, it attracts electrons stronger than hydrogen. Therefore the two covalent bonds are polar.
The option b is incorrect because if oxygen and hydrogen had similar electronegativities, they would form no-polar bonds.
The option c is incorrect because oxygen is more electronegative than hydrogen (you can check that in a periodic table).
The options d and e are incorrect because the molecular size or hydrophilic don't influence the type bond.