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
Nimfa-mama [501]
3 years ago
12

A) A 100-watt lightbulb radiates energy at a rate of 100 J/s. (The watt, a unit of power, or energy over time, is defined as 1 J

/s.) If all of the light emitted has a wavelength of 520 nm, how many photons are emitted per second? (Assume three significant figures in this calculation.)
Express your answer using three significant figures.

B) How much energy (in \({\rm J}\)) is contained in 1.00 mole of 490\({\rm nm}\) photons?
Express your answer to three significant figures and include the appropriate units.

C) What is the de Broglie wavelength of an electron traveling at 1.48

Chemistry
1 answer:
Ipatiy [6.2K]3 years ago
8 0

Answer:

The answers are as given in the attachment

Explanation:

The application of the de brogile equation was used and appropriate substitution were made as shown in the attachment

You might be interested in
Help please
ss7ja [257]
0.0821 L-atm/mol-K
8.314 kPa-L/mol-K
7 0
2 years ago
Read 2 more answers
Can anyone tell me how to balance chemical equations
cupoosta [38]
count each atom of the reactants and the products
8 0
3 years ago
Read 2 more answers
How many ions are in 1.50 grams of Na+?
Jobisdone [24]

Answer:

= 0.0652 moles

Explanation:

I hope it helps you

7 0
2 years ago
What is the term for a bond composed of three electron pairs shared between two atoms?
liraira [26]
A covalent bond? Not sure how much detail you want, sorry
7 0
2 years ago
How many moles of ethane (C2H6) would be needed to react with 62.3 grams of oxygen gas?
Vladimir [108]
Note that it says oxygen "gas"
So you need the atomic mass of oxygen gas

Look at your periodic table, you'll see 15.9994 under oxygen
Oxygen gas has a formula of O2 therefore,
(15.9994) times 2= Oxygen gas atomic mass=31.9988

Mol= Mass/Atomic Mass
=62.3 g/ 31.9988 g/mol = 1.95 mol

now look at the ratio of C2H6 and O2, notice there is an invisible number beside each of them, at that "invisible number" is =1

1 C2H6 + 1 O2 -> products

this means that for 1 mol of C2H6, 1 mol of O2 has to react with it

Thus as we have 1.95 moles of O2, we need 1.95 moles of C2H6
5 0
3 years ago
Other questions:
  • Consider the reaction 2N2(g) O2(g)2N2O(g) Using the standard thermodynamic data in the tables linked above, calculate Grxn for t
    15·1 answer
  • List all the possible quantum-jump transitions by which the excited atom could emit a photon.
    13·1 answer
  • If you have 2.41 × 1024 atoms of copper, how many moles of copper do you have? If you have 2.41 atoms of copper, how many moles
    14·1 answer
  • 1 Fuel with higher calorific value are considered efficient fuel. why?<br> 2
    8·2 answers
  • This question is very hard and I'm having trouble with it<br>​
    14·1 answer
  • Complete and balance the equation for th reaction of sodium with water
    6·1 answer
  • How many atoms are equal to 4.61 moles of carbon?
    14·2 answers
  • What are the three ways there can be a base change in a sequence?
    10·1 answer
  • How many particles are in 2.4 moles of carbon dioxide
    5·1 answer
  • SOMEONE PLEASE HELP ME WILL MARK BRAINLIEST PLEASE!!
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!