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
nexus9112 [7]
3 years ago
8

What is the answer for this 7th grade science

Chemistry
2 answers:
Doss [256]3 years ago
8 0
Answer is 4. they refer to atoms
Vaselesa [24]3 years ago
5 0
The green and black symbols refer to atoms, that make up the molecule of water, more specifically you can say that the 2 Hydrogen atoms are the black ones found outside, while the central atom, that is also green would be oxygen.
You might be interested in
Use the Henderson-Haaselbach equation based on the buffer equilibrium reaction to complete the statements below.
zloy xaker [14]
Hi, Again!

The answer to the drop downs are

•Increase
•Decreases
• 1:1
•5.9

Hope this helps !
8 0
3 years ago
Not sure....HELP!!!!!!!
Murrr4er [49]
Correct. the answer is c
4 0
3 years ago
1<br> The process of a solid turning into a liquid is called
katrin [286]

Answer:

Melting

Explanation:

Once heat is added it will turn to a liquid

7 0
3 years ago
Read 2 more answers
7th grade SCIENCE PLEASE HELP ​
Flura [38]

Answer:  the first one is adaptation, third is migration, 4th is hibernation,

Explanation:

i dont know the other ones, sorry because i am also a 7th grader.

4 0
3 years ago
Select the correct answer. Given: 2Al + 6HCl → 2AlCl3 + 3H2 If the chemical reaction produces 129 grams of AlCl3, how many grams
ivann1987 [24]

The reaction produces 2.93 g H₂.

M_r:                        133.34  2.016

        2Al + 6HCl → 2AlCl₃ + 3H₂

<em>Moles of AlCl₃</em> = 129 g AlCl₃ × (1 mol AlCl₃/133.34 g AlCl₃) = 0.9675 mol AlCl₃

<em>Moles of H₂</em> = 0.9675 mol AlCl₃ × (3 mol H₂/2 mol AlCl₃) = 1.451 mol H₂

<em>Mass of H₂</em> = 1.451 mol H₂ × (2.016 g H₂/1 mol H₂) = 2.93 g H₂

7 0
4 years ago
Other questions:
  • How many hydrogen atoms are in a cycloalkane with 6 carbon atoms?
    8·1 answer
  • 150.0 grams of an isotope with a half-life of 36.0 hours is present at time zero. How long will it take
    12·1 answer
  • Energy transformations are constantly taking place. <br><br><br> True or False
    6·2 answers
  • NH4OH --&gt; <br> Predict the products
    14·1 answer
  • Describe one technology used to travel to space and one technology used to return from space
    7·1 answer
  • Which substance is an inorganic compound
    8·1 answer
  • What is the molar mass of carbon (C)?
    12·2 answers
  • PLEASE HELP NEED AN ANSWER ASAP!!!!
    9·1 answer
  • Look at this picture of carbon dioxide. What are the things in the picture? Check all that apply.
    14·1 answer
  • Question 3 of 25
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!