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Komok [63]
3 years ago
12

PLEASE SEE I NEED HELP?!

Chemistry
1 answer:
viva [34]3 years ago
7 0

Answer:

i had this on study island the answer is "move a short distance away from the door until they collide with other air particles."

Explanation:

hope this helped :)

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How many calories is 130. joules?
skad [1K]
1 Cal ---------- 4.184 J
? Cal ---------- 130.0 J

130.0 x 1 / 4.184 => 31.07 Cal

hope this helps!


6 0
4 years ago
What is an atomic number
klemol [59]

Answer:

the number of protons is called the atomic number

hope it helps you buddy

8 0
3 years ago
Read 2 more answers
What volume (mL) of a concentrated solution of sodium hydroxide (6.00 M) must be diluted to 187 mL to make a 1.53 M solution of
Len [333]

Answer:

47.68 mL

Explanation:

In this case, we have a <u>dilution problem.</u> So, we have to start with the dilution equation:

C_1*V_1=C_2*V_2

We have to remember that in a dilution procedure we go from a <u>higher concentration to a lower one</u>. With this in mind, We have to identify the <u>concentration values</u>:

C_1~=~6.00~M

C_2~=~1.53~M

The higher concentration is C1 and the lower concentration is C2. Now, we can identify the <u>volume values</u>:

V_1~=~X

V_2~=~187~mL

The V2 value has <u>"mL"</u> units, so V1 would have <u>"mL"</u> units also. Now, we can include all the values into the equation and <u>solve for "V1"</u>, so:

6.00~M*V_1=1.53~M*187~mL

V_1=\frac{1.53~M*187~mL}{6.00~M}=47.68~mL

So, we have to take 47.68 mL of the 6 M and add 139.31 mL of water (187-47.68) to obtain a solution with a final concentration of 1.53 M.

I hope it helps!

6 0
3 years ago
in the reaction, 2h2 o2 --&gt; 2h2o, how many hydrogen molecules are needed to produce two water molecules?a. 1b. 2c. 3d. 4
natali 33 [55]
The balanced reaction between Hydrogen and Oxygen to form Water:

 2H₂ + O₂  →  2H₂O

From the equation it already states that:

2 molecules of Hydrogen H₂ are needed to produce 2 molecules of Water H₂O

So the answer is 2.

Option B.
7 0
3 years ago
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How does electrolysis separate hydrogen and oxygen.
Paladinen [302]

Answer:process of using an electrical current to separate water into hydrogen and oxygen gas

Explanation:

5 0
2 years ago
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