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
monitta
3 years ago
6

The specific heat of lead is 0.129 J/gC. Find the amount of heat released when 2.4 moles of lead are cooled from 37.2C to 22.5

C.
Chemistry
1 answer:
labwork [276]3 years ago
6 0

Answer:

-943J or 943J released

Explanation:

m=2.4 mol x 207.g/ mol=497.3g

c=.129 J/gC

T= T f-Ti=(22.5-37.2)=-14.7C

Q=?

Q=(49.3g)(.129 J/g C) (-14.7 C)

= -943 J or 943 J released

You might be interested in
Igneous rock can _____ to form metamorphic rock.
Ne4ueva [31]

Hello,

Question- Igneous rock can _____ to form metamorphic rock.


A. melt


B. harden


C. heat up


D. weather

Answer- Your answer is C. Heat up

Why- Any rock can become any rock igneous metamorphic or even condemnatory just by heating up but when it melts it becomes lava and the rock cycle starts all over again.

Important- If my answer was enough to help uou please mark me as Brainliest, Leave a thanks, and Rate my answer 5 stars thank you and have the best day ever!

3 0
4 years ago
Read 2 more answers
It takes
poizon [28]

The maximum wavelength that can break a Cl-Cl bond is 494 nm.

<em>Energy to break 1 Cl-Cl bond </em>

Energy = (242 kJ/1 mol) × (1000 J/1 kJ) × (1 mol/6.022 × 10²³ bonds)

= 4.019 × 10⁻¹⁹ J/bond

<em>Wavelength of photon </em>

<em>E</em> = h<em>f</em> = (h<em>c</em>)/λ

λ = (h<em>c</em>)/E = (6.626 × 10⁻³⁴ J × 2.998 × 10⁸ m·s⁻¹)/(4.019 × 10⁻¹⁹ J) = 4.94 × 10⁻⁷ m = 494 nm

6 0
3 years ago
What is 105.6 mmhg= ? Torr
Nata [24]
Mm of Hg is the same as Torres, therefore, it should be 105.6 Torr
7 0
3 years ago
*BRAINLEST* is a solution an element, compound, homogenous mixture, or heterogeneous mixture?
castortr0y [4]
Homogenous mixture


Brainliest?
8 0
3 years ago
Consider the dissolution of AB(s): AB(s)⇌A+(aq)+B−(aq) Le Châtelier's principle tells us that an increase in either [A+] or [B−]
Arlecino [84]

Answer:

A. 0.000128 M is the solubility of M(OH)2 in pure water.

B. 3.23\times 10^{-6} M is the solubility of M(OH)_2 in a 0.202 M solution of M(NO_3)_2.

Explanation:

A

Solubility product of generic metal hydroxide = K_{sp}=8.45\times 10^{-12}

M(OH)_2\rightleftharpoons M^{2+}+2OH^-

                      S         2S

The expression of a solubility product is given by :

K_{sp}=[M^{2+}][OH^-]^2

K_{sp}=S\times (2S)^2=4S^3

8.45\times 10^{-12}=4S^3

Solving for S:

S=0.000128 M

0.000128 M is the solubility of M(OH)2 in pure water

B

Concentration of M(NO_3)_2 = 0.202 M

Solubility product of generic metal hydroxide = K_{sp}=8.45\times 10^{-12}

M(OH)_2\rightleftharpoons M^{2+}+2OH^-

                   S          2S

So, [M^{2+}]=0.202 M+S

The expression of a solubility product is given by :

K_{sp}=[M^{2+}][OH^-]^2

8.45\times 10^{-12}=(0.202 M+S)(2S)^2

Solving for S:

S=3.23\times 10^{-6} M

3.23\times 10^{-6} M is the solubility of M(OH)_2 in a 0.202 M solution of M(NO_3)_2.

8 0
4 years ago
Other questions:
  • Magnesium fluoride contains only magnesium and fluorine. what is the formula for this compound? express your answer as a chemica
    11·2 answers
  • Copper metal reacts with hot concentrated sulfuric acid solution to form aqueous copper(ii) sulfate, sulfur dioxide gas, and wat
    9·1 answer
  • Which of these temperature scales can have negative numbers? Fahrenheit Celsius Kelvin joules
    7·1 answer
  • How is energy useful
    13·1 answer
  • A balloon contains 0.950 mol of nitrogen gas and has a volume of 25.5 L. How many grams of N2 should be released from the balloo
    15·1 answer
  • Cu(NO3)2 + Na2CO3 → CuCO3 + 2NaNO3
    6·1 answer
  • PLZ HELP ME ANSWER THIS!!!
    6·2 answers
  • 2.An atom with 35 mass number has 17
    6·1 answer
  • What does the word subcellular mean
    15·1 answer
  • What is not found on the inside of the eye? optic nerve, cornea, tear ducts, or iris?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!