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Kipish [7]
3 years ago
15

25 – 30 Apply the appropriate word to the definition indicated. Not all words will be used. 25. _____ Heat content of a system a

t constant pressure calorie (cal) 26. _____ Ability to do work Chemical Potential Energy 27. _____ Disorder Energy 28. _____ Energy of motion Enthalpy 29. _____ Study of energy changes that ocrrue during chemic reaction and changes in states. Entropy 30. _____ Amount of heat required to raise T of 1 g of pure water 1◦C Joule Kinetic energy Heat (q) Specific Heat Thermochemistry
Chemistry
1 answer:
masha68 [24]3 years ago
4 0
<span>25. _____ Heat content of a system at constant pressure calorie (cal) ---> Enthalpy

26. _____ Ability to do work Chemical ----> Energy

 27. _____ Disorder ----> Entropy

28. _____ Energy of motion ----> Kinetic energy

29. _____ Study of energy changes that ocrrue during chemic reaction and changes in states. ----> Thermochemestry

30. _____ Amount of heat required to raise T of 1 g of pure water 1◦C ----> Specific heat</span>
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How many moles of MgCl2 are there in 319 g of the compound?
Leokris [45]

Hey there!:

Molar mass MgCl2 = 95.2110 g/mol

So:

1 mole MgCl2 -------------- 95.2110 g

moles MgCl2 ---------------- 319 g

moles MgCl2 = 319 * 1 / 95.2110

moles MgCl2 = 319 / 95.2110

=> 3.350 moles of MgCl2


Hope that helps!

3 0
3 years ago
Water acts as a<br> solvent<br> solute<br> solution<br> mixture
Serhud [2]
Answer: universal Solvent

Explanation: water can dissolve many substances than any other solvent. Because of this, water is sometimes called a UNIVERSAL SOLVENT.
5 0
3 years ago
What is the term that describe two species living together
Sergeu [11.5K]
I think it is <span>Symbiosis. But I dont know how to explain it</span>
3 0
3 years ago
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Classify the following reactions: HCl(aq)+NaOH(aq)→NaCl(aq)+H2O(l)HCl(aq)+NaOH(aq)→NaCl(aq)+H2O(l) Ba(OH)2(aq)+ZnCl2(aq)→BaCl2(a
Savatey [412]

The reactions are

HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)

Ba(OH)2(aq) + ZnCl2(aq) → BaCl2(aq) + Zn(OH)2(s)

2AgNO3(aq) + Mg(s)  →  Mg(NO3)2(aq) + 2Ag(s)

Answer:

HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)   =  Acid-base reaction

Ba(OH)2(aq) + ZnCl2(aq) → BaCl2(aq) + Zn(OH)2(s)  =  Precipitation reaction

2AgNO3(aq) + Mg(s)  →  Mg(NO3)2(aq) + 2Ag(s)  =  Redox reaction

Explanation:

HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)  .

The reaction above is an example of an acid-base reaction. Acid-base reaction is a chemical reaction between an acid and a base. The product is usually a salt and water. An acid dissolves in water to produce H+ ion. Hydrochloric acid is a strong acid as it is completely dissociated in water. A base dissolves in water to form hydroxide ion(OH-). The sodium hydroxide is a strong base as it completely dissociate in water. The reaction between a base and an acid can be known as a neutralization reaction.

Ba(OH)2(aq) + ZnCl2(aq) → BaCl2(aq) + Zn(OH)2(s)

The reaction above is a precipitation reaction. Precipitation reaction is a reaction where two ionic bonds or cations and anions in an aqueous solution react to form an insoluble salts. The insoluble salt formed is known as the precipitate. The reaction above is an example of a double replacement reaction. From the equation the ions replace each other depending on the cations and anions. They switch partners as both reactants lose their partners to form new partnership with a different ion. The two reactants ( Ba(OH)2 and ZnCl2 ) are aqueous solution, they react to from a solid precipitates( Zn(OH)2(s) ).

2AgNO3(aq) + Mg(s)  →  Mg(NO3)2(aq) + 2Ag(s)

The reaction is known as an oxidation-reduction reaction(Redox reaction). A oxidation-reduction reaction their is a transfer of electron(s) between two species. The oxidation number of a chemical reaction changes by losing or gaining electrons. One of the reactant is a reducing agent and the other is an oxidizing agent.

From the reaction Mg is the reducing agent and AgNO3 is the oxidizing agents.

2 Ag+  +   2 e- → 2 Ag∧0  (reduction)

    Mg∧0  -  2 e- → Mg²+ (oxidation)

8 0
3 years ago
Which of the following compounds has the highest boiling point?1. F22. NaF3. HF4. ClF
sergey [27]

Answer:

HF

Explanation:

Hf has hydrogen bonding which is the strongest intermolecular forces. The stronger the IM forces, the higher the boiling point.

7 0
3 years ago
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