the answer you are looking for is 4.22 kj.
• Bubbles of a colourless, odourless gas are evolved
• The solution turns red litmus blue
Ca + 2H_2O→ Ca(OH)_2 + H_2
In the periodic table, there are seven horizontal rows of elements called periods.
Molar mass:
Br = 79.904 g/mol
CaBr2 = 199.886 g/mol
<span>CaBr2 = 2 Br + Ca
</span>
199.886 g --------------- 2 x 79.904 g
255 g -------------------- ?? ( mass of Br )
255 x 2 x 79.904 / 199.886 =
40751.04 / 199.886 =>203.87 g of Br
hope his helps!
They are heated by the sun. Good luck :)
