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
____ [38]
3 years ago
8

Which statement best describes the light that will cause emission of electrons from a given metal through the photoelectric effe

ct?
light with a low enough intensity
light with a high enough frequency
light with a high enough intensity
light with a low enough frequency
Chemistry
1 answer:
Sergio039 [100]3 years ago
4 0

Answer:

light with a high enough intensity

Explanation:

You might be interested in
How many seconds are required to produce 4.94 mg of chromium metal from an acidic solution of potassium dichromate, using a curr
lyudmila [28]
<span>Answer: The half-reaction is as followed: Cr2O72â’(aq) + 14H+ + 6e⒠→ 2Cr3+(aq) + 7H2O From the half-reaction, you can retrieve the following information: 1 mole of potassium dichromate =6 moles of e^- 6 moles of e^-=2 moles of Cr You will also need the following information: 1 mole of e^-=96,485 C and 1 mole of Cr=52.00g Calculate the number of moles that 4.94mg equates too: 4.94 mg=4.94 x 10^-3g of chromium*(1 mol/52.00g)=9.50 x 10^-5 mole of Cr How many moles of electrons are need to produce 9.50 x 10^-5 mole of Cr? Solve for moles of electrons: 9.50 x 10^-5 mole of Cr*(6 moles of e^-/2 mole of Cr)=2.85 x 10^-4 moles of e^- Whats the charge of 2.85 x 10^-4 moles of electrons? Use Faraday's constant: 2.85 x 10^-4 moles of e^-*(96,485 C/1 mole of e^-)=2.750 x 10^1 C Since current (A)=charge (C)/time (s), solve for time: A=C/s C/A=s 2.750 x 10^1 C/0.234 A=time (s) 1.18 x 10^2 s=118s=time <= 3 significant figures</span>
7 0
3 years ago
I need to know the measurements of this to the appropriate amount of significant figures
Vesnalui [34]

Answer:

[See Below]

Explanation:

140 ml.

3 0
3 years ago
2. At STP, a sample of gas occupies 24.5 mL. Calculate the volume of this gas at a
Law Incorporation [45]

Answer:

11.7 ml = V

Explanation: Here

6 0
3 years ago
The combustion of 3.795 mg of liquid B, which contains only C, H, and O, with excess oxygen gave 9.708 mg of CO2 and 3.969 mg of
attashe74 [19]

Answer:

Explanation:

9.708 mg of CO₂ will contain 12 x 9.708 / 44 = 2.64 g of C .

3.969 mg of H₂O will contain 2 x 3.969 / 18 = .441 g of H .

mg of O in given liquid B = 3.795 - ( 2.64 + .441 ) = .714 mg

ratio of mg of C , H , O in the compound = 2.64 : .441 : .714

ratio of no of atoms  of C , H , O in the compound

= 2.64 / 12 : .441 /1 : .714 / 16

= .22 : .44 : .0446

= .22 / .22 : .44 / .22 : .044 / .22

= 1 : 2 : .2

1 x 5 : 2 x 5 : .2 x 5

= 5 : 10 : 1

empirical formula of the compound = C₅H₁₀O

Volume of 89.8 mL at 1 .00 atm at 200⁰C

volume of gas at 1 atm and 0⁰C = 89.8 x 273 / 473 mL

= 51.83 mL

51.83 mL weighs .205 g

22400 mL will weigh .205 x 22400 / 51.83 g

= 88.6 g

So molecular weight = 88.6

Let molecular formula be (C₅H₁₀O)ₙ

molecular weight = n ( 5 x 12 + 10 + 16 )

= 86 n

86 n = 88.6

n = 1 approx

So molecular formula is same as empirical formula

C₅H₁₀O is molecular formula .

6 0
3 years ago
Convert the following<br> 1)<br> 52.1g NaNO3<br> To moles
ivann1987 [24]

Answer:

0.6129796138981438

5 0
3 years ago
Other questions:
  • 45.0 mL of a Naoh solution is titrated with 0.12 M HCl. If 29.6 mL is required for neutralization,
    12·1 answer
  • The student is now told that the four solids, in no particular order, are calcium bromide (CaBr2), sugar (C6H12O6), benzoic acid
    7·2 answers
  • En relación a la escala de ph se puede decir lo siguiente: I. Mientras más cerca del 8 la sustancia es más básica II. El papel t
    14·1 answer
  • If a snail with a red shell crossed with a white shell, what color would the children have shown in a punter square
    6·1 answer
  • In ___, each of the bulbs would be<br><br> Set up in paths independent and complete.
    5·1 answer
  • PLS HELP S O S *will give brainliest*
    14·1 answer
  • How many atoms are in 3.5 moles of arsenic atoms?
    12·1 answer
  • Which element has chemical properties most similar to carbon (C)?
    10·2 answers
  • Oil spills are a very serious form of pollution. They severely affect marine biodiversity and coastal ecosystems. The table show
    6·2 answers
  • 1. The following results were obtained in analysis of iron ore for iron: 34.79%, 34.86%, 34.80%, 34.53% and 34.76% Calculate the
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!