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
TEA [102]
4 years ago
13

Which of the following describes a difference between galaxies and solar systems? A. Galaxies contain only moons, while solar sy

stems contain planets.
B. Gravity holds solar systems in orbits but does not exist between stars in galaxies. C. A galaxy is a collection of millions of stars, while a solar system is a star and the planets around it.
D. It's easier to use astronomical units to measure distances in the galaxy but use light years for measurements in a solar system.
Chemistry
2 answers:
nirvana33 [79]4 years ago
8 0
The correct answers should be C
Tomtit [17]4 years ago
8 0

<u>Answer: </u>The correct answer is Option C.

<u>Explanation:</u>

A galaxy is defined as the huge collection of gas, dust and billions of stars along with their solar system. All these systems are held together by the gravitational attraction. For Example: Milky Way.

A solar system is defined as the collection of a star, planets along with their moons, satellites of the planets, asteroids, meteoroids and comets. In the solar system planets revolve around the Star. For Example: Our Solar System has a star named Sun and eight planets revolve around it.

Hence, the correct answer is Option C.

You might be interested in
What volume would a 0. 250 mole sample of h2 gas occupy if it had a which a a pressure of 1. 70 atm and a temperature of 35 C?
frosja888 [35]

The volume of  0. 250 mole sample of H_{2} gas occupy if it had a pressure of 1. 70 atm and a temperature of 35 °C is  3.71 L.

Calculation,

According to ideal gas equation which is known as ideal gas law,

PV =n RT

  • P is the pressure of the hydrogen gas  = 1.7 atm
  • Vis the volume of the hydrogen gas = ?
  • n is the number of the hydrogen gas = 0.25 mole
  • R is the universal gas constant = 0.082 atm L/mole K
  • T is the temperature of the sample = 35°C = 35 + 273 = 308 K

By putting all the values of the given data like pressure temperature universal gas constant and number of moles in equation (i) we get ,

1.7 atm×V = 0.25 mole ×0.082 × 208 K

V = 0.25 mole ×0.082atm L /mole K × 308 K /1.7 atm

V = 3.71 L

So, volume of the sample of the hydrogen gas occupy is  3.71 L.

learn more about ideal gas equation

brainly.com/question/4147359

#SPJ4

4 0
2 years ago
9. A student wished to prepare ethylene gas by dehydration of ethanol at 140oC using sulfuric acid as the dehydrating agent. A l
Arte-miy333 [17]

We have that the the liquid is

  • C_2H_5OH (ethanol
  • And at a condition of H_2SO4 as catalyst and temp 170

From the question we are told

  • A student wished to prepare <em>ethylene </em>gas by <em>dehydration </em>of ethanol at 140oC using sulfuric acid as the <em>dehydrating </em>agent.
  • A low-boiling liquid was obtained instead of ethylene.
  • What was the liquid, and how might the reaction conditions be changed to give ethylene

<h3>Ethylene formation</h3>

Generally the equation is

2C_2H_5OH------CH3CH_2O-CH_2CH_3+H_20

Therefore

with ethanol at 140oC

The product is diethyl ethen

The reaction at 170 ethylene will give

C_2H_5OH-------CH_2=CH_2+H_2O( at a condition of H_2SO4 as catalyst and temp 170)

Therefore

The the liquid is

  • C_2H_5OH (ethanol

For more information on Ethylene visit

brainly.com/question/20117360

8 0
2 years ago
Can I get some urgent help please?​
ololo11 [35]

Answer:

hi here goes your answer

Explanation:

iv. The lower the PH, the weaker the base

5 0
3 years ago
Based on the graph below, if you chose an alien at random on day 20, what form would it most likely be in?
ArbitrLikvidat [17]

Answer:

A. Thin

Explanation:

i took the test a while back yw <3

4 0
3 years ago
Calculate the amount of solute needed for 1000 ml of 15% sodium thiosulfate
maksim [4K]
15% =  15 grams of solute in 100 mL solution

15 g --------------- 100 mL
?? ------------------ 1000 mL

1000 x 15 / 100 = 

15000 / 100 => 150 g of solute

hope this helps!
7 0
4 years ago
Other questions:
  • Chemical Formula for Coffee?
    11·1 answer
  • (EASY!!) What is the name for this structure?
    11·2 answers
  • The energy required to remove an electron from the outermost shell is called
    12·1 answer
  • Which causes waves in the ocean to occur?​
    11·1 answer
  • During studies of the reaction below,
    10·1 answer
  • In your own words right a definition of earth core
    6·2 answers
  • Question 6 of 10
    8·1 answer
  • Which suitable reagent distinguishes ketones and aldehydes from carboxylic acids and on observation, gives a white precipitate??
    5·2 answers
  • 2. Paano nakatutulong ang mga hakbang sa pagbuo ng isang panimula at makabuluhang
    13·1 answer
  • Which stimulus is an example of an internal stimulus?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!