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
aleksandr82 [10.1K]
3 years ago
12

A 38.4−g sample of ethylene glycol, a car radiator coolant, loses 852 J of heat. What was the initial temperature of the ethylen

e glycol if the final temperature is 32.5°C? (c of ethylene glycol = 2.42 J/g·K)
Chemistry
1 answer:
irina [24]3 years ago
4 0

Answer:

296.33K

Explanation:

Data;

Q = 852J

mass (m) = 38.4g

θ₂ = 32.5°C = 305.5K

θ₁ = ?

c = 2.42 J/g.K

From the equation of heat transfer;

Heat transfer (Q) = MC∇θ

Q = mc(θ₂ - θ₁)

852 = 38.4 * 2.42 * ( 305.5 - θ₁ )

852 = 28389.504 - 92.928θ₁

Collect like-terms

92.928θ₁ = 27537.504

Divide both sides by 92.928 to make θ₁ the subject of formula .

θ₁ = 296.33K

You might be interested in
1. What pressure would be exerted by 46.0grams of hydrogen gas placed into a 3.00 L container at
dlinn [17]

Answer:

187.34 atm

Explanation:

From the question,

PV = nRT.................. Equation 1

Where P = Pressure, V = Volume, n = number of mole, R = molar gas constant, T = Temperature.

make P the subject of the equation

P = nRT/V.............. Equation 2

n = mass(m)/molar mass(m')

n = m/m'............... Equation 3

Substitute equation 3 into equation 2

P = (m/m')RT/V............ Equation 4

Given: m = 46 g, T = 25°C = (25+273) = 298 K, V = 3.00 L

Constant: m' = 2 g/mol, R = 0.082 atmL/K.mol

Substitute these values into equation 4

P = (46/2)(0.082×298)/3

P = (23×0.082×298)/3

P = 187.34 atm

3 0
2 years ago
Which is a correct comparison between the modern quantum model and John Dalton’s model of the atom?
REY [17]

Answer:

Explanation:

The modern model recognizes particles in the atom, whereas Dalton's model does not.

7 0
3 years ago
How many total phosphorus atoms are shown in the following: Al2P3? *
Wewaii [24]

Answer:

3 P atoms

Explanation:

Al₂P₃ => contains 2 Aluminum ions (2Al⁺³) and 3 Phosphide ions (3P⁻³) ... The ions (charged particles) are from atoms that have lost or gained electrons during the bonding process. So, Al₂P₃ => P⁻³ ions from 3 P atoms.

6 0
3 years ago
Can you please tell me the steps to figure how the answers to number 2?
Evgesh-ka [11]

Answer:

its a trick yo have to add it all

Explanation:

7 0
3 years ago
The molecular weight of potassium ferricyanide is 329.24 grams/mol. How would you make 1 liter of a 500mM potassium ferricyanide
True [87]

Answer:

w = 164.62 g

Explanation:

molarity of a solution is given as -

Molarity (M)  =  ( w / m ) / V ( in L)

where ,

m = molecular mass ,

w = given mass ,

V = volume of solution ,

From the question ,

M = 500 mM = 0.5 M

( since , 1 mM =  1 / 100 M)

As we know , the molecular mass of potassium ferricyanide = 329.24 g/ mol

V = vol.of solution = 1 L

w = ?

<u>To find the value of w , using the above formula , and putting the respected values , </u>

Molarity (M)  =  ( w / m ) / V ( in L)

0.5  =  ( w / 329.24 ) / 1 L

w = 164.62 g

6 0
2 years ago
Other questions:
  • Consider the chemical equation. 2H2 + O2 mc022-1.jpg 2H2O What is the percent yield of H2O if 87.0 g of H2O is produced by combi
    11·2 answers
  • What is the net ionic equation of the reaction of mgso4 with sr(no3)2?
    15·2 answers
  • What is the chemistry principle for silly putty and candle
    15·1 answer
  • 46.6 grams of mercury II sulfate (HgSO4) reacts with an excess of sodium Chloride (NaCl). How many grams of mercury II chloride
    6·1 answer
  • If calcium chloride is dissolved in water, what can be said about the concentration of the calcium ion? a. It has the same conce
    9·1 answer
  • In which of the substances in Figure 3-1 are the forces of attraction among the particles so weak that they can be ignored under
    13·2 answers
  • What are the resulting coefficients when you balance the chemical equation for the combustion of ethane, C2H6? In this reaction,
    10·1 answer
  • In a compressional wave, when the particles are far apart, what is the part known as
    14·1 answer
  • What is a disadvantage of a series circuit?
    10·1 answer
  • A gas mixture contains the following gases with the mole fractions indicated:
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!