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
Alina [70]
4 years ago
11

A 125G sample of water was heated to 100.0°C and then I borrow platinum 20.0°C is dropped into the beaker the temperature of the

platinum in the beaker quickly rose 235.0°C the specific heat of platinum is 0.13 j/g°C. The specific heat of water is 4.184 J/g°C. What is the mass of platinum
Chemistry
1 answer:
Sophie [7]4 years ago
5 0

Answer:

mass of platinum = 2526.12 g

Explanation:

Given data:

Mass of water = 125 g

Initial temperature of water= 100.0°C

Initial temperature of Pt = 20.0°C

Final temperature = 235°C

Specific heat of Pt = 0.13 j/g°C

Specific heat of water = 4.184 j/g°C

Mass of platinum = ?

Solution:

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = T2 - T1

Q(w) = Q(Pt)

m.c.  (T2 - T1)   =   m.c.   (T2 - T1)

125 g × 4.184 j/g°C ×  (235°C - 100.0°C)  = m × 0.13 j/g°C ×  (235°C - 20°C)

125 g × 4.184 j/g°C × 135°C  = m × 0.13 j/g°C × 215°C

70605 j = m×27.95 j/g

m = 70605 j /27.95 j/g

m = 2526.12 g

You might be interested in
there are several ways to express solution concentration dilute concentrated ppm molarity molality normality all of these have o
klio [65]

B: quantity of solute with a specific volome of solvent.

Have a Nice Day :)

4 0
3 years ago
Read 2 more answers
The closeness of a measurement to its true value is a measure of its _____.
svlad2 [7]
The closeness of a measurement to its true value is a measure of its accuracy. This term is the degree of which a certain measurement conforms to the correct value or the standard value. It is not the same with the term precision. Precision, on the other hand, is a measure used to characterize the closeness of the data measured.
7 0
3 years ago
Read 2 more answers
Which of the following is composed of many cells?
vodomira [7]

Answer:

Bacteria

Explanation:

8 0
3 years ago
If a buffer solution is 0.220 M in a weak acid ( Ka=7.4×10−5) and 0.540 M in its conjugate base, what is the pH?
valkas [14]

Answer: the pH of the solution is 4.52

Explanation:

Consider the weak acid as Ha, it is dissociated as expressed below

HA     H⁺  +  A⁻

the Henderson -Haselbach equation can be expressed as;

pH = pKa + log( [A⁻] / [HA])

the weak acid is dissociated into H⁺ and A⁻ ions in the solution.

now the conjugate base of the weak acid HA is

HA(aq) {weak acid}     H⁺(aq)  +  A⁻(aq) {conjugate base}

so now we calculate the value of Kₐ as well as pH value by substituting the values of the concentrations into the equation;

pKₐ = -logKₐ

pKₐ = -log ( 7.4×10⁻⁵ )

pKₐ = 4.13

now thw pH is

pH = pKₐ  + log( [A⁻] / [HA])

pH = 4.13 + log( [0.540] / [0.220])

pH = 4.13 + 0.3899

pH = 4.5199 = 4.52

Therefore the pH of the solution is 4.52

6 0
3 years ago
What are the three types of symbiotic relationships?
krok68 [10]

Answer: mutualism, commensalism, and parasitism

Explanation: with mutualism, both partners benefit. With commensalism, only one species benefits while the other is neither helped nor harmed. With parasitism, one organism (the parasite) gains benefits, while the other (host) suffers.

6 0
3 years ago
Read 2 more answers
Other questions:
  • Observing Gas Properties - Flammability
    8·1 answer
  • A 4.00 g mass of NaOH is dissolved in 5.00 mL of water. A 4.00-mL aliquot of this solution is then diluted to exactly 500 mL of
    14·1 answer
  • A/1 * B/C =D
    15·1 answer
  • Mass is:
    13·2 answers
  • Indicate whether each statement is true or false: a. Substitutional alloys tend to be more ductile than interstitial alloys. b.
    10·1 answer
  • Chromosomes are found in the_______of the cell
    7·2 answers
  • a man with mass 60kg climbs up staircase having 30 step each of 10cm height in 10seconds.Calculate his power.​
    9·1 answer
  • Write a hypothesis for measuring the amount of sunlight that makes flowers grow best.
    14·1 answer
  • How many molecules are there in an ideal gas with a volume of 7.27 L at STP?
    11·1 answer
  • Fill in the coefficients that will balance the following reaction:
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!