Answer:
The reaction between the salt and water is endothermic
Explanation:
An endothermic reaction is one that absorbs heat from the surrounding creating a kind of coldness in the immediate environment of the reaction. The direct opposite of endothermic reaction is exothermic reaction, a reaction that dissipates heat to the immediate surrounding of the reaction.
Commercial cold packs works based on the principle of endothermic reaction. The packs are usually made up of water and ammonium nitrate salts isolated by easily breakable barriers. The dissolution of ammonium nitrate salts in water is generally endothermic.
In order to make use of the cold pack, a force needs to be applied to the pack in order to break the barrier separating the water and the ammonium salt. The water-ammonium salt mixture creates an endothermic reaction which immediately lowers the temperature of the resulting solution to about 35 F for a period of 10 to 15 minutes.
pKa= -log(ka)
= -log(2.3*10^-9)
= 8.64
Now pH can be calculated using equation:
pH=pka+log(BrO-)/(HBrO)
8.08 =8.64+log(BrO-)/(HBrO)
log(BrO-)/(HBrO)=8.08-8.64
= -0.56
(BrO-)/(HBrO)= 10^-0.56
=0.275
Answer:
Because glaciers are so sensitive to temperature fluctuations accompanying climate change. so if it gets hotter then the ice glaciers will melt.
Explanation:
Answer: 1and 4
Explanation: iron is an element not an alloy. An ionic lattice is not bonded covalently.
<h2>♨ANSWER♥</h2>
Textiles for clothes are also sometimes finished with chemicals, for example, to stiffen them and make them wrinkle-free. Chemicals in their nanoforms are helping make textiles more resistant to water, stains, wrinkles, bacteria and mould. Some of the chemicals can be harmful.
<u>☆</u><u>.</u><u>.</u><u>.</u><u>hope this helps</u><u>.</u><u>.</u><u>.</u><u>☆</u>
_♡_<em>mashi</em>_♡_