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V125BC [204]
3 years ago
15

I NEED THIS ASAP Someone please help me

Chemistry
2 answers:
IceJOKER [234]3 years ago
8 0

Answer:

B. Four moles of water were produced from this reaction.

Explanation:

I took the test and got it correct

marysya [2.9K]3 years ago
6 0

Answer:

the answer is B

Explanation:

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Which of the following is considered a form of technology?
anygoal [31]

Answer:

The answer is B. Hope this helps! please give me brainliest!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! =)

8 0
3 years ago
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PLS heLPPP. IM DYINGG
Shkiper50 [21]

Answer:

exothermic

Explanation:

This chemical reaction is an exothermic reaction because heat is liberated into the environment.

In organic chemistry, the reaction is termed a combustion reaction. In such a reaction, a fuel combines with oxygen to produce carbon dioxide and water.

It is an energy transformation from chemical energy to heat energy.

  • An exothermic reaction is one in which heat is liberated to the surrounding.
  • The surrounding becomes hotter at the end of the reaction.

In the reaction depicted, heat is liberated.

4 0
3 years ago
A buffer is prepared by adding 139 mL of 0.39 M NH3 to 169 mL of 0.19 M NH4NO3. What is the pH of the final solution? (Assume th
Paha777 [63]

Answer:

pH = 9.48

Explanation:

We have first to realize that NH₃ is a weak base:

NH₃ + H₂O ⇔ NH₄⁺ + OH⁻     Kb = 1.8 x 10⁻⁵

and we are adding this weak base to a solution of NH₄NO₃ which being a salt dissociates 100 % in water.

Effectively what we have here is a buffer of a weak base and its conjugate acid. Therefore, we need the Henderson-Hasselbach formula for weak bases given by:

pOH = pKb + log ( [ conjugate acid ] / [  weak base ]

mol NH₃ = 0.139 L x 0.39 M = 0.054 mol

mol NH₄⁺ = 0.169 L x 0.19 M = 0.032 mol

Now we have all the information required to calculate the pOH ( Note that we dont have to calculate the concentrations since in the formula they are a ratio and the volume will cancel out)

pOH = -log(1.8 x 10⁻⁵) + log ( 0.032/0.054) = 4.52

pOH + pH = 14 ⇒ pH = 14 - 4.52 = 9.48

The solution is basic which agrees  with NH₃ being  a weak base.

5 0
3 years ago
Balance the following equation <br>H2S+SO2➡️S+H2O
grin007 [14]
2H2S+2SO2 》》 4S+2H2O hope that'll help u
8 0
3 years ago
If you have a density of 3 g/mL and a mass of 15 g, what is the volume?
marta [7]

Answer:

15 ml

Explanation:

Volume = mass / density.

So our answer is 15 / 3 = 15 mL

3 0
2 years ago
Read 2 more answers
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