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
crimeas [40]
3 years ago
6

Calculate the energy of a photon with a frequency of 9.78 x 1021 Hz.

Chemistry
1 answer:
Alex_Xolod [135]3 years ago
8 0

Answer:

9.98538 kilohertz

Explanation:

젠장젠장

You might be interested in
What is the mass of 2.70 ×10^22 molecules of NaOH (Molar mass = 40.0 g/mol)?
Viefleur [7K]
Data:
Molar Mass of NaOH = 40 g/mol

Solving: <span>According to the Law Avogradro, we have in 1 mole of a substance, 6.02x10²³ atoms/mol or molecules
</span>
1 mol -------------------- 6.02*10²³ molecules
y mol -------------------- 2.70*10²² molecules

6.02*10²³y = 0.270*10²³ 
y =  \frac{0.270*\diagup\!\!\!\!\!\!10^{\diagup\!\!\!\!\!\!23}}{6.02*\diagup\!\!\!\!\!\!10^{\diagup\!\!\!\!\!\!23}}
\boxed{y \approx 0.04\:mol}


Solving: <span>Find the mass value now
</span>
40 g ----------------- 1 mol of NaOH
x g ------------- 0.04 mol of NaOH

x = 40*0.04
\boxed{\boxed{x = 1.6\:g}}\end{array}}\qquad\quad\checkmark

Answer:
The mass is 1.6 grams
6 0
3 years ago
What is the chemical formula for Salt and hydrogen gas?
marshall27 [118]
Salt: NaCl
Hydrogen gas: H2
3 0
2 years ago
A chemist determined by measurements that 0.050 moles of aluminum participated in a chemical reaction. Calculate the mass of alu
Law Incorporation [45]

Answer:

13.5 g

Explanation:

This question is solved easily if we remember that the number of moles is obtained by dividing the mass into the atomic weight or molar mass depending if we are referring to elements or molecules.

Therefore, the mass of aluminum in the reaction will the 0.050 mol Al times the atomic weight of aluminum.

number of moles = n = mass of Al / Atomic Weight Al

⇒ mass Al = n x Atomic Weight Al = 0.050 mol x 27 g mol⁻¹

                                                         = 13.5 g

We have three significant figures in 0.050 and therefore we should have three significant figures in our answer.

           

8 0
3 years ago
1. What is the name of the ion formed from the sulfur atom?
dolphi86 [110]

Answer:

1 sulfide

2 Fluoride

3 A

5 A

6 2

3 0
3 years ago
Cations are formed from the?
viva [34]

A caption is a positively charged ion. They are formed when an ion loses one or more electrons. Typical it is the loss Of their valence electrons.

4 0
3 years ago
Other questions:
  • Why do we use copper for iPhone chargers
    8·1 answer
  • What are resources?​
    14·1 answer
  • Define calories and how the body gets energy
    6·1 answer
  • An aqueous solution of sodium hydroxide is standardized by titration with a 0.170 M solution of perchloric acid. If 28.5 mL of b
    12·1 answer
  • How many moles are in 7.8g of CaO?
    15·1 answer
  • How many moles in 28 grams of UO22-
    10·1 answer
  • If you were working in the lab, what would be the main reason for collecting and treating the waste from this titration experime
    13·1 answer
  • Please help I don’t have a lot of time left
    13·2 answers
  • Which statement describes why sodium reacts more vigorously than magnesium to hydrochloric acid? Refer to the periodic table. Ci
    11·2 answers
  • "Crude oil dustillation"
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!