1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
dezoksy [38]
3 years ago
13

In a coffee-cup calorimeter, 100.0 g of H2O and 8.70 grams of Na3PO4 are added. The water had an initial temperature of 24.6 oC.

After the dissolution of the sodium phosphate the temperature changed to  31.3 oC. 
-Was the dissolution exothermic or endothermic? Explain. 

-Calculate how much heat the water lost or gained.​
Chemistry
1 answer:
Alex3 years ago
3 0

Answer:

a.) exothermic

b.) 2,800.6 J

Explanation:

You might be interested in
Which of the following is not a trend that varies systematically in the periodic table
juin [17]

Answer: B: Symbols of Elements

Explanation:

3 0
2 years ago
Read 2 more answers
If a gas occupies 733 mL at 10.0 °C, at what temperature will it occupy 950 mL, assuming the pressure of the gas remains constan
raketka [301]
This is an example of Charles’ Law problems, the basic equation is: V1/T1 = V2/T2. One vital thing to recall for all gas law problems is that the temperature must be in Kelvin (not Celsius). 
So our given is 10.0 C = 283 K. So 
V1/T1 = V2/T2 
733/283 = 950/T2 

T2 = 367 K 
5 0
3 years ago
If you have a solution that is 15 percent by mass of KCl in benzene, what is the new boiling point?
Serhud [2]

Answer:

https://www.chegg.com/homework-help/questions-and-answers/1-10-points-solution-15-percent-mass-kcl-benzene-new-boiling-point--901-c-b-921-c-c-821-c--q63751186

Explanation: Thats your answer

3 0
2 years ago
What observations can you make about this group of people? Name one inference you can make from your observations.
Vlad1618 [11]

Answer:

What group of people ay?

Maybe look at their differences in appearance: height, size, weight, skin color, clothing choice?

7 0
3 years ago
Read 2 more answers
The theoretical yield is the amount of product actually produced. <br><br> a. True<br> b. False
jolli1 [7]

Answer:

a. True

Explanation:

Theoretical yield is the amount of product that could be obtained if a chemical reaction has 100% efficiency.

Hope it helps...

6 0
3 years ago
Read 2 more answers
Other questions:
  • A newly discovered element, X, has two naturally occurring isotopes. 93.5 percent of the sample is an isotope with a mass of 268
    11·2 answers
  • What is the ideal gas constant?
    12·1 answer
  • Carbon-14 is the typical radioisotope used to date materials; however it has limitation to 40000 years a scientist who wants to
    5·1 answer
  • Which of the following compounds contains a double bond? A - NH3 B - CO2 C - N2 D - CI2
    5·1 answer
  • What substances are used up during photosynthesis
    7·1 answer
  • write the chemical equation for the following reaction: the elements carbon and oxygen combine to yield the compound carbon diox
    5·2 answers
  • Calculate the half-life (in s) of a first-order reaction if the concentration of the reactant is 0.0576 M 17.1 s after the react
    6·1 answer
  • Calculate the molarity of a 10.0% (by mass) aqueous solution of hydrochloric acid.
    9·1 answer
  • What is the charge of a potassium (K) ion?
    6·2 answers
  • Manganese atom has 30 neutrons and atomic number 25
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!