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3 years ago

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 dilution problem. 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 higher concentration to a lower one. With this in mind, We have to identify the concentration values:

$C_1~=~6.00~M$

$C_2~=~1.53~M$

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

$V_1~=~X$

$V_2~=~187~mL$

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

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2 years ago