Exothermic reaction discharges energy in forms of
light, heat or sound, thus it is represented by negative flow of heat. In this
equation:
<span><span>
NaOH (aq) + H2SO4 (aq)
</span>à<span>
H2O (l) + Na2SO4 (aq)</span></span>
<span>
When the solution of Sodium hydroxide is added to the Sulphuric acid, water and Sodium
sulfate is produced. To balance this, we put (2) two on Sodium hydroxide and (2)
two on water.</span>
<span><u>
2</u><span>NaOH (aq) +
H2SO4 (aq) </span>à<u>
2</u><span>H2O
(l) + Na2SO4 (aq)</span></span>
<span> </span>
Answer:
atomic number 3
boiling point 1,342 °C (2,448 °F)
specific gravity 0.534 at 20 °C (68 °F)
oxidation state +1
electron configuration 2-1 or 1s22s1
Explanation:
i think this Is right 99% sure
Answer: ice is less dense than liquid water. If ice was more dense, Earth would freeze.
Explanation: There are many reasons why life on Earth depends on the characteristics of water. One could discuss hydrogen bonds and its role as a solvent, but the unusual property of water is is the change in density with change in temperature. Water is densest at 4 degC, which is why ice floats - it is less dense than cold water (it melts quickly in warm water, so density isn’t impotant at higher temperatures). Most liquids are less dense than the solid, frozen form. If this was the case with water, any ice that formed would sink, and sease would freeze from the bottom up. Furthermore, the lowest layers would be insulated and would not all melt in summer. Thus over time, the seas would become a thin layer of liquid water at best, over solid ice. Life could not develop without liquid seas. In addition, ice is reflective, reducing the amount of sunlight absorbed, further reducing temperatures. Without ocean circulation, polar areas would be even colder, and there would be no rain.
Atomic radii increase when going down a group and decreases when going towards the anion periods. So A and D.
I think it's covalent...? Hope that helps.
