CHEMISTRY MIDDLE SCHOOL

True or False: the force of attraction that holds two atoms together is called a chemical bond

Answers

Answer 1
Answer: The answer is true.
Answer 2
Answer:

Answer:

true

Explanation:

k12

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How do you do problem #15?

Answers

you would convert the cg to g. 1.66 cg is 0.0166 g. then you add. 0.398 + 0.0166 = 0.4146. the answer is 0.4146 grams.

What is the compound of nacI is an example of a/an?

Answers

Sodium chloride is the compound of nacl.

The compound of NaCl is sodium chloride

If a sexually reproducing organism has 28 chromosomes in its body cells how many chromosomes did it inherit from each parent

Answers

14 from each parent. 14 x 2 = 28

Consider the half reactions below for a chemical reaction.Mg— Mg2(aq) + 2e-
2H* (aq) + 2e--> H2(g)
What is the overall equation for this chemical reaction?
Mg(s)+2H+ (aq) — Mg2+ (aq) + H2(
Mg(s) + 2H+ (aq) —> Mg2+ (aq) + 2e-
Mg2+ (aq)+H2(9)—> Mg(s)+ 2H+ (aq)
Mg(s)+2H--> Mg(aq) + H2(g)​

Answers

Answer:

Explanation:

The half reactions are:

         Mg_(s) → Mg²⁺_(aq) + 2e⁻

        2H⁺_(aq)  + 2e⁻ →  H₂_(g)

The first equation is an oxidation half while the second is a reduction half. To get the overall reaction equation, we simply combine the two equations. The reactants combines at the left hand side with the products comes together at the right hand side.

Mg_(s) +  2H⁺_(aq)  + 2e⁻  → Mg²⁺_(aq) + 2e⁻ +  H₂_(g)

Now we cancel out the species that appear on both sides:

Mg_(s) + 2H⁺_(aq) → Mg²⁺_(aq) + H₂_(g)

Answer:answer is A on edg

Explanation:

Name two different ecosystems.Name one living part of each ecosystem.Name one non living part of each ecosystem.

Answers

Ecosystems: Coral Reef, Savanah 
Living: In coral reef; clown fish   In Savanah: Emu
Nonliving: In Coral reef: Water   In Savanah: sun
there is a freshwater ecosystem one living thing is fishes a non living thing is lots of concentrations of dissolved oxygen. Another ecosystem would be a forest ecosystem one living thing would be insects one non living would be water

Air enters and exits the lungs through the ___.aveoli
bronchi
pulmonary vein
trachea

Answers

the answer is aveoli
It would be alveoli! :)
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A lab technician needs to create 570.0 milliliters of a 2.00 M solution of magnesium chloride (MgCl2). To make this solution, how many grams of magnesium chloride does the technician need?Refer to the periodic table for help. Express your answer to three significant figures.The required mass is grams.