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
Paladinen [302]
3 years ago
6

How much heat in j is giving out when 85.0g of lead cools from 200.0 c to 10.0c

Chemistry
1 answer:
photoshop1234 [79]3 years ago
5 0

Answer:

q = - 2067.2 J of Heat is giving out when 85.0g of lead cools from 200.0 c to 10.0 c.

Explanation:

The Specific Heat capacity of Lead is 0.128 \frac{J}{g\ ^{0}C}

This means, increase in temperature of 1 gm of lead by 1 ^{0}\ C will require 0.128 J of heat.

Formula Used :

q = m.c.\Delta T

q = amount of heat added / removed

m = mass of substance in grams = 85.0 g

c = specific heat of the substance = 0.128

q = m.c.\Delta T = Change in temperature

                                          = final temperature - Initial temperature

                                          = 10 - 200

                                          = -190 ^{0}\ C

put value in formula

q = -  85\times 0.128\times 190

On calculation,

q = - 2067.2 J

- sign indicates that the heat is released in the process

You might be interested in
Cocaine selectively blocks na+ (sodium) channels, which is the mechanism that leads to
anzhelika [568]
Cocaine selectively blocks sodium channels which is the mechanism that leads to local anesthetic effects. 
Voltage gated sodium channels play very important roles in the body as they are responsible for action initiation and propagation in excitable cells, such as nerves, muscles and neuroendocrine cells. Like other sodium ion channels blockers such as lidocaine, Cocaine selectively blocks sodium ion channels which denies entry of sodium ions in the cell, thus leading to local anesthetic effects. 
5 0
4 years ago
Convert 0.95 kilograms into centigrams. (1 g = 100 cg; 1 kg = 1000 g)
svet-max [94.6K]

Answer:

95,000 centigrams

Explanation:

There is 1000 CG in 0.01 kilograms

so you do 1000*95 which equals 95,000 centigrams.

6 0
3 years ago
Classify each of the following as a physical or a chemical change. Give
hjlf

Answer:

a is a physical changes

b is physical changes

c is a Chemical change

d is a physical changes

5 0
3 years ago
What is more likely to happen if wetlands are drained?
Rudik [331]
Animals and Plants won't have a place to live, get food and resourses. Some organisms won't have anyshelter, because some live in the water. 
8 0
3 years ago
Antique paintings will deteriorate more rapidly in a humid environment. Art museums will combat this by placing a desiccant into
stira [4]

233.1g

Explanation:

Given:

Formula units of FeCl₃ = 8.65 x 10²³ formula units

Unknown:

Mass of the FeCl₃ = ?

Solution:

The formula unit is the same as the amount of subatomic particles in an atom.

  1 mole of a substance = 6.02 x 10²³ formula units

 For  8.65 x 10²³ formula units; the number of moles;

  Number of moles = \frac{8.65 x 10 ^{23} }{6.02 x 10^{23} } = 1.44moles

Now to find the mass of  FeCl₃;

   Mass of  FeCl₃ = 1.44 x 162.2 = 233.1g

learn more:

Number of moles brainly.com/question/1841136

#learnwithBrainly

3 0
3 years ago
Other questions:
  • 0.0136 g + 2.70 × 10-4 g - 4.21 × 10-3 g = ?
    11·2 answers
  • How many neutrons does the most common isotope of hydrogen have?
    9·1 answer
  • What do you understand by Gas oline​
    10·2 answers
  • What is the mass of bismuth carbonate (597.99 g/mol) that decomposes to release 50.0ml of carbon dioxide gas at stp? 0.000445 g
    11·1 answer
  • In an endothermic reaction what is true of the enthalpy
    6·1 answer
  • Megan prepares a pitcher of lemonade by adding a quarter cup of granular sugar to the mixture. Which action should she take so t
    9·2 answers
  • What is 9872002 in scientific notation?
    8·2 answers
  • En ocasiones, cuando se sufre de digestión pesada, se recurre a ingerir infusiones de
    6·1 answer
  • Needed Help...<br> for this work​
    8·1 answer
  • The stronger the wind, the larger the particles it erodes.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!