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
AlladinOne [14]
3 years ago
10

Sirius, the brightest star, is 8.8 light-years from Earth. That means

Chemistry
1 answer:
Luda [366]3 years ago
6 0
C) we can see Sirius as it looked 8.8 light years ago.
You might be interested in
1) A mixture of anhydrous sodium carbonate and sodium hydrogencarbonate of mass 10.000 g was heated until it reached a constant
vodomira [7]

The masses of the components are obtained as;

  • Sodium hydrogen carbonate = 3.51 g
  • Sodium carbonate =  8.708 g
<h3>What is decomposition?</h3>

The term decomposition has to do with the breakdown of the given substance into its components. The components of sodium hydrogen carbonate could be identified as water vapor, carbon dioxide gas and sodium carbonate. Among these products that have been listed here, we can see that it is only the sodium carbonate that remains as a solid. The others are gases that move away from the system that is under study.

Now putting down the equation of the reaction, we have;

2NaHCO_{3} (s) ----- > Na_{2} CO_{3} (s) + CO_{2} (g) + H_{2} O(g)

Now, the loss in  mass must be due to the carbon dioxide and the water. Hence we obtain the loss in mass to be 10.000 g -  8.708 g = 1.292 g

Mass of sodium hydrogen carbonate = 2 * 88 g/mol * 1.292 g/62 g/mol

= 3.51 g

Learn more about anhydrous sodium carbonate :brainly.com/question/20479996

#SPJ1

6 0
1 year ago
What is the electron configuration for magnesium (Mg)?
AveGali [126]

Magnesium has atomic no 12

Electronic configuration given by

  • 1s²2s²2p⁶3s²

Or

  • [Ne]3s²
6 0
2 years ago
I need help with this one
Kruka [31]

Answer:

H, B, G, D, E, C, A, F

explanation: the ones that are the deepest are the oldest

7 0
3 years ago
What pressure is exerted by 0.883 mol N, in a 4.68 L steel container at 197.9 °C?
SpyIntel [72]

I really hope i helped you! :)

6 0
3 years ago
4. Which of these metals is a pure element? Brass Bronze Silver Steel 5. C is the correct chemical symbol for ....... Calcium Ca
Gala2k [10]

Answer:

4) Silver

5) Carbon

6) Oxygen

3 0
3 years ago
Read 2 more answers
Other questions:
  • How do evaporation and boiling differ?
    9·2 answers
  • An element is lustrous, brittle, and silver colored. What type of element is it
    9·1 answer
  • How many d and f orbitals total are present in the n = 4 shell of a hydrogen atom? Enter your answer as a whole number.
    10·1 answer
  • Neon atoms are known to produce a mass spectrum that consists of three peaks at m/z values of 20, 21 and 22, with the relative a
    15·1 answer
  • If A • B*2 = 1.8 x 10*-7, and C•B/D = 7.2 x 10*-4, find the value of A•D*2/C*2
    12·1 answer
  • A 25 mL sample of 0.100 M HNO3 completely reacts with NaOH according to this equation:
    14·2 answers
  • What is a disadvantage of using moving water to produce electricity?
    7·2 answers
  • Cups ans glasses are taking too long to air dry. This could be caused by
    13·1 answer
  • Which of the following statements describe what a normative system is?​
    9·1 answer
  • The energy that is released in the hydrogen fusion reaction comes from __________.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!