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
klasskru [66]
3 years ago
7

Which tool is used to detect yellow light rays emitted by stars from outer space?

Chemistry
1 answer:
elixir [45]3 years ago
3 0
Answer A

x-ray optical telescope.

hope this helps!.

You might be interested in
How many moles are there in 990 grams of sugar, C12H22011? (Sig Figs, do not
Nitella [24]

Answer:

Number of moles = 2.89 mol

Explanation:

Given data:

Number of moles of sugar  = ?

Mass of sugar = 990 g

Solution:

Formula:

Number of moles = mass/molar mass

Molar mass of C₁₂H₂₂O₁₁:

12× 12 + 22×1.008 + 16×11 = 342.2 g/mol

Number of moles = 990 g / 342.2 g/mol

Number of moles = 2.89 mol

6 0
3 years ago
What happens to the rate of reaction when you decrease the temperature of a chemical reaction?
Neporo4naja [7]
Depending on what chemicals you use it slows the reaction
4 0
3 years ago
Read 2 more answers
Balance N2 + H2 —NH3 what type of reaction
AnnyKZ [126]
3! You have to ensure balance of all the different elements.
5 0
3 years ago
The ________ orbital is degenerate with 5py in a many-electron atom.
arsen [322]

The ________ orbital is degenerate with 5py in a many-electron atom.


<h2>5px is the correct answer</h2>
5 0
3 years ago
When 2 moles of Fe(s) react with Cl2(g) to form FeCl3(s) according to the following equation, 799 kJ of energy are evolved.
GenaCL600 [577]

Answer:

1. Exothermic.

2. -1598 kJ.

Explanation:

Hello!

1. In this case, according to the reaction, we can infer that 799 kJ of energy are evolved (given off, released) it means that the enthalpy of reaction is negative as the reactants have more energy than the products; which means this is an exothermic reaction.

2. Here, as we know that the enthalpy of reaction is -799 kJ/mol, we can compute the q-value as shown below, considering the reacted 2 moles of solid iron:

q=2mol*-799 kJ/mol\\\\q=-1598kJ

Which means that 1598 kJ of energy are evolved when 2 moles of solid iron react.

Best regards!

4 0
3 years ago
Other questions:
  • What are mole ratios used for?
    7·1 answer
  • When measuring the volume of a liquid in a graduating cylinder, you measure_____.
    8·2 answers
  • Out of the following, which has the least amount of mass? A) protons B) none of the above C) electrons D) neutrons
    11·1 answer
  • Which of the following is not an element that makes up all living organisms?
    8·1 answer
  • Salt and sugar are poured into a glass of water and stirred. Slowly, the salt and sugar crystals become harder to see and then c
    5·1 answer
  • What does burning bread in a toaster demonstrate? (a) Energy can create a change. (b) Energy can cause motion. (c) A toaster cre
    12·1 answer
  • Past due! Help please I choose the middle picture for my hypothesis being inclusive can you help explain why and how it shows it
    12·1 answer
  • A. How does the atomic radius change going down and across the periodic table?
    6·1 answer
  • If you decreased the volume of a sample of gas by a factor of three while maintaining a constant
    11·2 answers
  • Individuals in a population that have a variation which gives them an advantage in their environment are more likely to ...
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!