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
-BARSIC- [3]
3 years ago
7

If the temperature of 15 grams of water changes from 21C to 24C, how many joules of heat were involved? Show work

Chemistry
1 answer:
goblinko [34]3 years ago
6 0

Answer:

189 Joules

Explanation:

Applying,

Q = cm(t₂-t₁)............. equation 1

Where Q = Heat, c = specific heat capacity of water, m = mass of water, t₁ = Initial Temperature, t₂ = Final temperature.

From the question,

Given: m = 15 grams = 0.015 kg, t₁ = 21 °C, t₂ = 24 °C

Constant: c = 4200J/kg.°C

Substitute these values into equation 1

Q = 0.015×4200×(24-21)

Q = 0.015×4200×3

Q = 189 Joules

You might be interested in
Which kind of statement distinguishes a term from all other terms?
Goshia [24]
I believe the answer is a definition. 
6 0
3 years ago
b) Si los ácidos nitroso y fluorhídrico están descritos como electrolitos débiles, ¿significa que en la disolución hay moléculas
viva [34]

Los electrolitos son sustancias que se disocian en agua para dar iones.

Generalmente en química, podemos clasificar sustancias como

  • Electrolitos
  • No electrolitos

Los electrolitos pueden disociarse en solución para producir iones, pero un no electrolito no puede hacer eso.

Entre los electrolitos hay dos clases;

  • Electrolitos fuertes
  • Electrolitos débiles

Los electrolitos fuertes se disocian completamente en solución, mientras que los electrolitos débiles no se disocian completamente en solución.

El hecho de que los electrolitos débiles no se disocien por completo significa que algunas moléculas de la sustancia no se disocian.

Por lo tanto, si los ácidos nitroso y fluorhídrico se describen como electrolitos débiles, esto significa que hay moléculas en la solución que no están disociadas.

Lea más: brainly.com/question/14566383

5 0
2 years ago
What is one way that electric charges are different from magnetic poles?
sashaice [31]
The answer is A. As the first statement is a true statement. Hope this help you
5 0
3 years ago
Help asap <br><br> i have to get a good grade on this
baherus [9]
I think The answer is 34.5l
4 0
3 years ago
a compound is 21.20% nitrogen,6.06% hydrogen, 24,30% sulfur, and 48.45% oxygen. write the empirical formula and name the compoun
IRISSAK [1]

The numbers may be off by a few, if you worked it out, since my periodic table is for AP chemistry. Hope this helps!!!

4 0
3 years ago
Other questions:
  • The chemical combination of two or more different atoms in fixed amounts is called a(n)?
    15·1 answer
  • Balance the following redox reaction if it occurs in H2SO4. What are the coefficients in front of C3H8O2 and H2SO4 in the balanc
    15·1 answer
  • 1. The red light associated with the aurora borealis is emitted by excited oxygen atoms. This
    8·1 answer
  • Chemical weathering change the ___ of rock​
    8·1 answer
  • A student added 32.60 mL of 0.03020 M NaOH to a 20.0 mL sample of ginger ale before his sample turned pink. (a) How many moles o
    15·2 answers
  • Help Asap plz Thx giving lots of points!!!
    7·1 answer
  • A single atom of calcium could combine with a single atom of fluorine, creating electron energy stability for both atoms. True F
    13·1 answer
  • Who wants to help me ???
    13·1 answer
  • Iron sulfide is a compound. It is made by heating a mixture of iron and sulfur.
    15·1 answer
  • What holds everything in place in the universe?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!