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
pentagon [3]
3 years ago
11

Celestial object A is composed of 92.1 percent hydrogen and 7.8 percent helium while celestial object B is made up of ice, froze

n carbon dioxide, rock, and dust. What is celestial object A? A. asteroid B. comet C. dwarf planet D. black hole E. star
Chemistry
1 answer:
Andrew [12]3 years ago
5 0

Answer:

star

Explanation:

stars are composed of 92.1 percent hydrogen and 7.8 percent helium.

You might be interested in
Can anyone help me with this please​
ddd [48]

Answer:

5 = particle 7= atoms

Explanation:

i renever easily

4 0
3 years ago
Read 2 more answers
James measured the humidity of the air on his backyard each morning for four days His data is recorded below On which day did it
Over [174]

Answer:

hdbdjsjsj

Explanation:

hdhshshe

3 0
3 years ago
How are the atomic number and the number of protons related to each other?
Romashka-Z-Leto [24]
Neutral atoms of each element contain an equal number of protons and electrons. The number of protons determines an element's atomic number and is used to distinguish one element from another. Together, the number of protons and the number of neutrons determine an element's mass number.
8 0
3 years ago
How do you balance the following solution Zn(s)+HCI(aq)—>ZnCI2 (aq) + H2(g)
Ierofanga [76]

<u>Answer:</u> The atoms of every element on both the sides of the reaction must be same.

<u>Explanation:</u>

We are given a chemical equation and we need to balance it. Every equation follows Law of Conservation of mass.

This law states that in a chemical reaction, the number of atoms of each element must be same on both the sides of the equation.

For the given chemical equation:

Zn(s)+HCl(aq)\rightarrow ZnCl_2(aq)+H_2(g)

On reactant side:

Number of zinc atoms = 1

Number of hydrogen atoms = 1

Number of chlorine atoms = 1

On product side:

Number of zinc atoms = 1

Number of hydrogen atoms = 2

Number of chlorine atoms = 2

As, the number of hydrogen and chlorine atoms on reactant and product side is not same, so we need to add a stoichiometric coefficient in-front of HCl on the reactant side. The balanced chemical equation becomes:

Zn(s)+2HCl(aq)\rightarrow ZnCl_2(aq)+H_2(g)

8 0
3 years ago
Is it possible for two parents displaying a dominant trait to have a child displaying that recessive trait? A. Yes, they always
Kryger [21]
I think the answer is D. Hope it help!
4 0
3 years ago
Read 2 more answers
Other questions:
  • 6. What is the production of a magnetic field by electric current called.
    7·1 answer
  • ______________ are caused by earth's internal heat sources.
    8·2 answers
  • When an atom forms chemical bonds, its_becomes more stable
    14·1 answer
  • A cylinder with a moveable piston contains 0.552 mol of gas and has a volume of 259 mL . Part A What will its volume be if an ad
    14·1 answer
  • For a given reaction, ΔS = +106 J/mol ⋅ K, and the reaction is spontaneous at temperatures above the crossover temperature, 446
    14·1 answer
  • Compare and contrast 10kg of melting ice and 1kg of freezing water address temperature heat flow thermal energy what is the simp
    9·1 answer
  • 1. what part (or parts) of the system store potential energy?
    9·1 answer
  • How many cl- ions are there in 2. 50 kg of barium chooride.
    14·1 answer
  • Which colour would you expect ekasilicon to be
    13·1 answer
  • A lone pair must reside in which orbital type(s) to participate in resonance/conjugation/delocalization?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!