Answer:
1) Endothermic.
2) 
3) 
Explanation:
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1) In this case, for these calorimetry problems, we can realize that since the temperature decreases the reaction is endothermic because it is absorbing heat from the solution, that is why the temperature goes from 22.00 °C to 16.0°C.
2) Now, for the total heat released by the reaction, we first need to assume that all of it is released by the solution since it is possible to assume that the calorimeter is perfectly isolated. In such a way, it is also valid to assume that the specific heat of the solution is 4.184 J/(g°C) as it is mostly water, therefore, the heat released by the reaction is:
3) Finally, since the enthalpy of reaction is calculated by dividing the heat released by the reaction over the moles of the solute, in this case NH4Cl, we proceed as follows:
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Answer:
hydrocarbons are the answer
Answer:
either first or second if not them try d but I'm pretty sure a also I'm sorry if I getbyou this wrong I dearly apologize
Answer:
CaF2 + CO3- ----> CaCO3 + 2 F-
Explanation:
The chemical compounds found on the left side of the date are the reagents and those found on the right are the products, where calcium carbonate appears.
Calcium carbonate is a quaternary salt
The two reasons Democritus’ ideas about the atom were NOT accepted are atoms are indestructible and they move in infinite space.
<h3>
What is atom?</h3>
An atom is the smallest unit of ordinary matter that forms a chemical element.
<h3>
Democritus’ ideas about atom</h3>
Democritus believed that atoms were uniform, solid, hard, incompressible, and indestructible and that they moved in infinite numbers through empty space until stopped.
Differences in atomic shape and size determined the various properties of matter.
Thus, the two reasons Democritus’ ideas about the atom were NOT accepted are atoms are indestructible and they move in infinite space.
Learn more about atoms here: brainly.com/question/6258301
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