Answer:
Hydrogen and Oxygen
Explanation:
also it can be written as H2O
The answer it is most likely to be is b lol
Answer:
- 618.8 J.
Explanation:
- To solve this problem, we can use the relation:
<em>Q = m.c.ΔT,</em>
where, Q is the amount of heat released by steam (Q = ??? J).
m is the mass of the steam (m = 15.5 g).
c is the specific heat of the steam (c of steam = 1.996 J/g.°C).
ΔT is the difference between the initial and final temperature (ΔT = final T - initial T = 100.0°C - 120.0°C = - 20.0°C).
<em>∴ Q = m.c.ΔT</em> = (15.5 g)(1.996 J/g.°C)(- 20.0°C) =<em> - 618.8 J.</em>
The land of mass that is surrounded by water has more stable climate and smaller temperature flactuation is because of the property of water called specific heat, water has a specific heat of 4180 J/kg C this means that it needs a lot of energy to raise the temperature of water and also vice versa. unlike in the area surrounded by mass like deserts where the sand has a specific heat of about 880 j/kg C which means it only needs small amount of energy to raise its temperature and also to cool down, that is why during at morning in the desert is too hot while at night it is too cold
Moles Ca(OH)2 = 12.9 /74.092 g/mol=0.174
<span>moles H3PO4 = 18.37/98.0 g/mol=0.187 </span>
<span>3 : 2 = x : 0.187 </span>
<span>x = moles Ca(OH)2 needed =0.281 </span>
<span>we have only 0.174 moles of calcium hydroxide so it is the limiting reactant </span>
<span>moles Ca3(PO4)2 = 0.174/3=0.0580 </span>
<span>mass = 0.0580 mol x 310.18 g/mol=18.0 g</span>
