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
kakasveta [241]
3 years ago
5

Will medal!!!

Chemistry
1 answer:
hjlf3 years ago
5 0
Δ H reaction = q / n where q: amount of heat released and n is number of moles of substance.
q = m . C . ΔT where:
m = mass of substance (g)
C = Specific heat capacity (4.18)
ΔT = change in temperature = 24.25 - 23.16 = 1.09
q = 1000 x 4.18 x 1.09 = 4556 J = 4.556 kJ
number of moles (n) = Molarity (M) x Volume (L)
                                 = 0.185 M x 0.07 L = 0.01295 mole
Δ H = q / n = - (4.556 kJ / 0.01295 mole) = -351.8 kJ / mol
Note: it is exothermic reaction (-ve sign)  i.e. temperature is raised

You might be interested in
4.
Bad White [126]

Answer:

thick, insulating fur

Explanation:

If an animal lives in a freezing climate, it makes sense logically that the animal would adapt and develop a layer of thick fur to keep its body insulated and maintain homeostasis.

Hope this helped and please consider a Brainliest! :)

5 0
3 years ago
Read 2 more answers
What happens to the particles during solid to a liquid
Ratling [72]

the particles from solid to liquid start to move around faster then it was at the first state

3 0
3 years ago
Two common materials we encounter in our daily lives are radiator coolant in automobiles and dry ice. The coolant in an automobi
Yuki888 [10]

Answer:

See explanation

Explanation:

Using the formula

°C = (F-32) × 5/9

Where;

°C = temperature in degrees centigrade

F= temperature in Fahrenheit

F= (9/5 ×°C) +32

F= (9/5 × 110) + 32

F= 230°F

To convert -78°C to Kelvin

-78°C + 273 = 195 K

3 0
3 years ago
What element has 8 valence electrons
Maksim231197 [3]
An element with 8 valence electrons is Neon (Ne).
Ps: Any element under group 18 has 8 valence electrons except for Helium (He).
4 0
3 years ago
Calculate the [oh−] in a solution with a ph of 12.52.
BaLLatris [955]
PH + pOH = 14

12.52 + pOH = 14

pOH = 14 - 12.52

pOH = 1.48

[OH⁻] = 10^ -pOH

[OH⁻] = 10 ^- 1.48

[OH⁻] = 0.033 M
6 0
3 years ago
Other questions:
  • Read the list of substances. Wood, Copper, Iron, Foam Which substances are good conductors of heat?
    13·2 answers
  • Which electron configuration of the 4f energy sublevel is most stable?
    11·1 answer
  • How does the skin protect your internal organs from the outside world?
    9·1 answer
  • 1. How many protons does 14/6 C contain? What element is this?
    7·1 answer
  • A certain substance X has a normal boiling point of 117.8°C and a molal boiling point elevation constant =Kb·0.63°C·kgmol−1. A s
    12·1 answer
  • The device shown in the picture is used by electric utility power stations to produce electrical energy from _____ energy.A. Sol
    13·2 answers
  • 2. Sa epikong binasa, sinusuong at nilalabanan ni Indarapatra ang mga halimaw ,
    14·1 answer
  • In garden peas٫round seed coats (R) Is a dominant over wrinkled seed coats (r). What will the result be of a cross between a het
    7·1 answer
  • ¿Cuál es la diferencia entre los compuestos alifáticos y ciclicos?
    10·2 answers
  • 6. What's the structure of PF? Is it polar or non-polar?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!