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
Oduvanchick [21]
3 years ago
12

4. What do radio telescopes use to gather and focus radio waves?

Chemistry
1 answer:
Tom [10]3 years ago
5 0
I think it would be C
You might be interested in
A 5.00 gram sample of an oxide of lead PbxOy contains 4.33g of lead. Determine the simplest formula for the compound.
Valentin [98]
PbO2

You have to take the mass of lead in the problem, and divide by the molar mass.
When you do the same with oxygen, you get a number about twice as large as when you divide the mass of lead by the molar mass of lead. This means that the simplest formula  would be PbO2

8 0
3 years ago
What is the maximum amount of ammonia that can be produced when 0.35 mol Nz reacts with 0.90 mol Hz?
professor190 [17]

Answer:

0.6 moles NH₃

Explanation:

The reaction that takes place is:

  • N₂ + 3H₂ → 2NH₃

First we <u>determine the limiting reactant</u>:

  • 0.35 mol N₂ would react completely with (3*0.35) 1.05 moles of H₂. There are not as many H₂ moles, so H₂ is the limiting reactant.

Then we <u>convert H₂ moles (the limiting reactant) to NH₃ moles</u>, keeping in mind the <em>stoichiometry of the reaction</em>:

  • 0.90 mol H₂ * \frac{2molNH_3}{3molH_2}= 0.6 moles NH₃

5 0
3 years ago
Helium and nickel are examples of ________. These
emmasim [6.3K]

Answer:

Elements, in turn, are pure substances—such as nickel, hydrogen, and helium—that make up all kinds of matter.

Hope This Helps!       Have A Nice Day!!

3 0
3 years ago
Which planet in our solar system is closest to the sun?
Dafna11 [192]
The answer is c)mercury
4 0
3 years ago
The environment can be changed in many ways, both by humans and nature. Some of these changes are good, while some are not. Sort
Ksju [112]

Answer:

Answers below (just some ethics)

Explanation:

Bad= Earthquake activity causing damage in a major city.

Bad= Producing and emitting smog from a smokestack.

Good= Planting native bushes to help control erosion.

Good= Volcanic eruption resulting in the formation of an island.

7 0
3 years ago
Other questions:
  • Calculate the standard enthalpy of formation of ammonium carbonate in Kcal/mol?
    8·1 answer
  • How many grams of iron metal do you expect to be produced when 265 grams of an 84.5 percent by mass iron (II) nitrate solution r
    9·2 answers
  • Are electrons found outside of an atom
    12·1 answer
  • In terms of atomic structure, explain why the first ionization energy K is less than that of Ca ?
    6·1 answer
  • What parts do all cells have?
    6·2 answers
  • I’ll mark you brainlist
    10·2 answers
  • Can someone help me with these two?
    6·2 answers
  • He dose of a medicine is 3.0 mg/kg of body mass. Calculate the dose in milligrams for a 112-lb person.
    14·1 answer
  • Write 6.3 x 10^2 in standard form.
    8·1 answer
  • A flask at room temperature contains exactly equal amounts (in moles) of nitrogen and xenon.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!