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lions [1.4K]
2 years ago
12

HELP!!!!!! PLEASE!!!

Chemistry
1 answer:
mixas84 [53]2 years ago
7 0

Answer:

C

Explanation:

sorry if im wrong!!

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C₇H₆O₂ + O₂ -->CO₂ +H₂O Find the chemical reaction
lions [1.4K]

Answer:

Air

Explanation:

idrk im just an idiot

3 0
3 years ago
Read 2 more answers
A student dropped a piece of nickel metal into a solution of HCl(aq). He observed the formation of gas bubbles and collected the
omeli [17]

Answer:

a. The student performed the splint test incorrectly. He should of observed a popping sound when the splint was placed in the test tube.

Explanation:

It is given that a student performed an experiment where he dropped a nickel metal in to HCl solution. He observed the reaction and performed a splint test in the test tube that is filled with a gas which is formed while Nickle is dropped into the solution of HCl.

But the experiment that the student performed was incorrect. He must have observed the popping sound when the splint was placed in the test tube.

When the splint was added to the gas splint flared up. The hydrogen gas pops out when exposed to the flame.

$Ni + HCl(aq) = NiCl + H_2$

Thus the correct option is (a).

5 0
3 years ago
Do all colors of light have the same energy?
icang [17]
No, darker colors like purple and blue have higher wave frequency which transmit more energy.
6 0
3 years ago
A student performed an investigation at sea level. First she placed 400 mL of water in four different containers. Then she place
Pachacha [2.7K]
The answer is b your welcome
4 0
2 years ago
A 4-g mass of NaOH is dissolved in 5mL of water.
lapo4ka [179]
Molar mass NaOH = 40.0 g/mol

Volume in liters of solution :

5 mL / 1000 => 0.005 L 

number  of moles :

4 / 40 => 0.1 moles

M = n / V

M = 0.1 / 0.005

 = 20 mol/L or 20 M

hope this helps!
6 0
3 years ago
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