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What is LiNO3 in chemistry?
now listen my firnds mamma has a story to tell once upon i atime there was a fairy called lino yeowww, lino was then murded with an axe and skined alive, then they scalpeld her eyes out (jeeze painful much) so that was the stroy of lino and the chemisrty love you truly mc and cm yayaya
How do you know it is a exothermic reaction?
If you are in a lab and want to tell whether a reaction was exothermic, carefully check the temperature of the reaction vessel. If the reaction was exothermic, the vessel will be warmer than it was before the reaction occurred. If you are looking at a reaction on paper, you will need a table of thermodynamic data. It should contain the molar enthalpies of formation, represented by H, of each of the reactants and products (note: if a reactant or product is an element in its most stable state, like H2(g) or Zn(s), the enthalpy of formation is defined as zero, so they may be left out of the table). Multiply the number of moles of each product and reactant by its molar enthalpy. Add up all the results for the products and subract all the results for the reactants. If your net result is negative, the reaction was exothermic. If it is positive, the reaction was endothermic. Example: CH4(g)+2O2(g)-->CO2(g)+2H2O(g) Delta H (kJ/mol) CH4(g) -74.8 O2(g) 0 CO2(g) -393.5 H2O(g) -241.82 Products: 2(-241.82)+(-393.5)= -877.14 kJ Reactants: -74.8+2(0)= -74.8 kJ Total: -877.14-(-74.8)= -802.34 kJ The reaction was exothermic.
Is the combustion of methane an exothermic or endotermic?
Endothermic means that the net energy produced when chemical bonds reform is less that the energy required to break the original bonds. (It gets cold because it need more energy from the surrounding molecules)Exothermic means that the net energy produced is more than the required energy to break the original bonds. (it gets hot because it releases energy)Using logic and personal experiences, when you ignite something, such as methane, it burns. just the fact that it burns shows that it is releasing energy in the form of light/heat. this makes the combustion of methane Exothermic.
Suppose you mixed two chemicals in the lab until you could not tell the two apart. After some time passed a white powder formed which would not dissolve and settled on the bottom. The mixture was firs?
After the reaction of silver nitrate with an alkali salt an insoluble white silver salt is precipitated in water.
How do you tell endothermic reaction from an exothermic reaction by looking at the chemical equation?
You have to add up the bond energies of all the bonds on the products side and the reactants side. When bonds are formed energy is released. Conversely energy has to be put into a system to break bonds (like smashing a block of ice with a baseball bat) If there is more bond energy on the products side bonds were created (energy was released) which means the reaction is exothermic. If there is more bond energy on the reactants side, bonds were broken (energy put in) and so the reaction is endothermic.
Can you use ammonium nitrate as garden fertilizer i have it in the form of used chemical cold packs?
You should be able to providing ammonium nitrate and water is the only ingredients. Ammonium nitrate is a powerful oxidizer meaning it will burn things on contact like your plants,there roots and your flesh. I've never dealt with cold packs so I have no idea what the final concentration is after they are used. Diluting it significantly like 20 to 1 and testing a small amount on an expendable plant would be advisable. Pure ammonium nitrate only supplies nitrogen. Your plants also need potassium and phosphorus and the ratios vary from plant to plant. If you want to do some weird science try diluting it then mixing in a few handfuls of wood ash for the potassium,pee in it a few times for the phosphorus then test some on your plants. I use nitrogen based fertilizers mixed with ash from my fire place and pee on my outdoor plants all the time when no one is looking and they are doing great. My neighbors think I have a green thumb but I'm allways tempted to tell them, No. I Have a green p*&@#r. Good luck.
What does h tell about a reaction?
The reaction is exothermic.
How can you tell the difference between an endothermic and exothermic reaction?
You can generally tell by changes in temperature, whether you have an exothermic reaction which produces heat, or an endothermic reaction which consumes heat.
What is the name of the ionic compound (NH4)2O?
The compound is ammonium oxide. You can tell because the NH4+ and O2- ions are present.
Is calcium nitrate an element?
No. You can tell by the name "calcium nitrate". Means it has both calcium and nitrates in it. Elements are only one thing through and through.
Is ironIII nitrate soluble or insoluble in hexane?
Iron(III) nitrate is soluble in water, but hexane is a nonpolar solvent and is typically immiscible with polar compounds like iron(III) nitrate. Therefore, iron(III) nitrate is insoluble in hexane.
What is a substitution for silver nitrate?
Potassium nitrate or sodium nitrate can be used as a substitution for silver nitrate in some chemical reactions. However, it's important to consider the specific properties and reactivity of each compound before substituting one for another.
How can you tell if an aquarium has a fuctioning nitrate cycle?
You use a test kit and test for Nitrate/Nitrite/Ammonia. If you have either of the last two the cycle is not coping.
What does a negative deltaH tell about a reaction?
the reaction is exothermic
How can you tell that melting boiling dissolving are physical changes?
The physical and chemical properties, and chemical composition, are not changed after a physical change.
What does a negative H tell about a reaction?
A negative change in enthalpy (ΔH) indicates that a reaction is exothermic, meaning it releases heat to its surroundings. This suggests that the products have less energy than the reactants, leading to a decrease in enthalpy during the reaction.
What happens when magnesium reacts with nitric acid?
When magnesium reacts with nitric acid, it undergoes a single displacement reaction where magnesium displaces hydrogen from the nitric acid, forming magnesium nitrate and hydrogen gas. The balanced chemical equation for this reaction is: Mg + 2HNO3 → Mg(NO3)2 + H2. The magnesium nitrate formed is a soluble salt, while the hydrogen gas is released as a byproduct.
