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
Ivenika [448]
3 years ago
5

feel free to answer any of these. i need the answer to the appropriate amount of significant figures on this pleasee

Chemistry
1 answer:
jekas [21]3 years ago
4 0

Answer:

6. (2.7*10^{5})

8. (1.0*10^{4})

Explanation:

You might be interested in
What mass of cucl2 is contained in 75.85 g of a 22.4% by mass solution of cucl2 in water?
Sindrei [870]
First  step: convert   22.4%  into   fraction
 that  is  22.4/100  which  is equivalent  to 0.224
  The  mass  of Cucl2  contained  in  75.85  of  22.4%  by  mass  of   solution  of  CUcl2 in  water is   therefore,
0.224 x75.85=16.99g
alternatively
75.85 --->100%
      ?        22.4%
by cross  multiplication =(22.4 x 75.85)/100 =16.99g
5 0
3 years ago
In which of the following is light energy converted to electrical energy
AleksandrR [38]
The answer is c.solar cell
4 0
3 years ago
Read 2 more answers
What is a mutation
Lubov Fominskaja [6]

the second one, any change in a DNA gene or chromosome

6 0
3 years ago
Read 2 more answers
What is one example of a scientific theory?
lesya692 [45]

The theory or relativity. The Big Bang theory (not the show. In science, the big bang theory is a real theory). I know that was two, I just wanted to give you more than one example! Please give me brainiest!

7 0
3 years ago
Calculate the wavelength and frequency at which the intensity of the radiation is a maximum for a black body at 298 K.
irakobra [83]

Answer:

wavelength (λ) = 2.73 E-4 m

frecuency (f) = 1.10 E12 s-1

Explanation:

Stefan-Boltzmann law:

  • intensity of the radiation for a black body (W) = σ.(T)∧4

∴ σ = 5.670 E-8  W/m²(K)∧4

∴ T = 298 K

⇒ W = (5.670 E-8 W/m²K∧4)×(298 K)∧4

⇒ W = 447.145 W/m² = 447.145 J/s.m²

assuming an area of  1 m²

⇒ W = 447.145 J/s

Rayleigh-Jeans's law:

∴ Black body radiation at a specific wavelength (Bλ(T)):

⇒ Bλ(T) = ( 2 c.k.T ) / (λ)∧4

∴ c = 3 E8 m/s.....velocity of speed

∴ k = 1.38065 E -23 J/K.........Boltzmann's constant

∴ Bλ(T) = 447.145 J/s.m²

⇒ (λ)∧4 = ((2)(3 E8 m/s)(1.38065 E-23 J/K)(298 K)) / (447.145 J/s)

⇒ λ = (5.521 E-15)∧(1/4)

⇒ λ = 2.73 E-4 m

  • f = c/λ

⇒ f = (3 E8 m/s) / (2.73 E-4 m)

⇒ f = 1.10 E12 s-1

8 0
3 years ago
Read 2 more answers
Other questions:
  • 2. Find the two generic molecules from Part 1 that are made of 3 atoms. a. Compare and contrast these two molecules by listing t
    13·1 answer
  • A container holds 15.0 g of phosphorous gas at a pressure of 2.0 atm and a temperature of 20.0 Celsius. What is the density of t
    12·2 answers
  • True or False? In a C++ floating-point constant, a decimal point is not required if exponential (E) notation is used.
    11·1 answer
  • Write a nuclear equation to represent radium-226 decaying to radon-222 plus an alpha particle.
    11·1 answer
  • A high gold-quartz ore contains is 0.25% gold by mass. how many grams of gold are in 1.25 tons of this ore?
    11·1 answer
  • How many moles of sodium are present in 17 g of Na?
    14·1 answer
  • Please help ASAPPPPPPPPPPPPPPP
    8·1 answer
  • Is pre ap chemistry hard in high school?
    10·2 answers
  • Is it true that an atom has 3 subatomic particles with a negative nucleus and the neutrons outside the the nucleus
    7·1 answer
  • Which isotope in each pair is more stable? Why?(a) ¹⁴⁰₅₅Cs or ¹³³₅₅Cs
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!