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
Dahasolnce [82]
2 years ago
14

How much heat must be removed from 15.5 g of water at 90.0°C to cool it to 43.2°C?

Chemistry
1 answer:
Katyanochek1 [597]2 years ago
3 0

Answer:

Heat, Q = 3035.073 J

Explanation:

It is given that,

Mass of water, m = 15.5 g

Initial temperature, T_i=90^{\circ} C

Final temperature, T_f=43.2^{\circ}

The specific heat of water is, c = 4.184 J/ g°C

The heat removed or absorbed by water is given by formula as :

Q=mc\Delta T\\\\Q=mc(T_f-T_i)\\\\Q=15.5\times 4.184\times (43.2-90)\\\\Q=-3035.073\ J

So, the heat of 3035.073 J is removed from 15.5 g of water.

You might be interested in
Explain why the C―Ha bond is much more acidic than the C―Hb bond in pentan-2-one. Select the single best answer. 253 Ha is less
mafiozo [28]

Answer:

Ha is more acidic than Hb because loss of Ha forms a resonance-stabilized conjugate base.

Explanation:

The carbon atom that is next to the carbonyl group in pentan-2-one is known as the alpha carbon atom, this carbon atom bears the Ha, the alpha hydrogen atoms.

Ha is more acidic than Hb because, loss of Ha leads to the formation of a resonance stabilized enolate ion. This resonance stabilization of the ion formed makes loss of Ha an easier process than loss of Hb, hence the answer above.

3 0
3 years ago
¿Cuál de las siguientes configuraciones globales corresponde a un elemento químico que se comporta como metal? 1 punto [He]2s2 2
yuradex [85]

Answer:

[Ne]3s2

Explanation:

ahora tenemos que mirar cada una de las configuraciones electrónicas de cada átomo de cerca antes de tomar una decisión.

considerando la configuración electrónica más externa de cada una de las especies mostradas;

para la primera configuración, ns2 np6 corresponde a un gas noble.

para la segunda configuración ns2 np3 corresponde a un elemento no metálico del grupo 5.

para la tercera configuración, ns2 corresponde a un elemento metálico del grupo 2.

para la cuarta configuración, ns2 np4 corresponde a un elemento no metálico del grupo 6

5 0
3 years ago
Germanium is a group 4A semiconductor. The addition of a dopant atom (group 3A element) that has fewer valence electrons than th
klasskru [66]

Answer:

Doping with galium or indium will yield a p-type semiconductor while doping with arsenic, antimony or phosphorus will yield an n-type semiconductor.

Explanation:

Doping refers to improving the conductivity of a semiconductor by addition of impurities. A trivalent impurity leads to p-type semiconductor while a pentavalent impurity leads to an n-type semiconductor.

7 0
2 years ago
Try try try please for me please
Inga [223]

Answer:

a.) It is a chemical reaction because a new substance was formed and a colour change occurred in the reaction.

b.) Iron- Metallic element

sulpher- Non-Metalic element

Iron Sulphide- Compound

HOPE IT HELPS....

8 0
3 years ago
The first method of determining the chemical composition of substances in space was to _____.
Art [367]

Answer:The first method to determine the chemical composition of a substance in space was using light. By determining red shift in the observed spectrum of light they could determine the elements they were observing

Explanation:

5 0
3 years ago
Other questions:
  • How many grams of chlorine gas are in a 17.8 liter sample at 1.1 atmospheres and 29 degrees Celsius
    7·1 answer
  • Which of the following gases is NOT found in Earth’s atmosphere?
    5·2 answers
  • Consider the following half reactions and their standard reduction potential values to answer the following questions.
    5·1 answer
  • What is the chemical formula for one phosphorus atom, three chlorine atoms, one oxygen atom?
    9·1 answer
  • The solubility of potassium permanganate in water at 20°C is 6.38 g per 100 g of water. What maximum mass of potassium permangan
    6·1 answer
  • Describe the three main types of plate boundary interactions:
    10·1 answer
  • Who is good at CHEMISTRY?????????/I NEED HELP
    12·2 answers
  • Do you think it is still possible for the Church today to imitate the ways of the early Christians? Give reason for your answer.
    6·1 answer
  • How many moles of boron<br> (B, 10.81 g/mol) are in 37.8<br> grams of boron?<br> [?] moles
    14·1 answer
  • Which statments are true about balancing chemical reactions?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!