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vodka [1.7K]
2 years ago
11

PLEASE HELP

Chemistry
1 answer:
Dovator [93]2 years ago
5 0

Answer:

B

Explanation:

All elements on both sides of the equation have the same amount of moles

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Which water carries the most oxygen in streams and rivers?
lbvjy [14]

the answer is fresh water

8 0
3 years ago
Identify this reaction.
sp2606 [1]

C₃H₈ + 5 O₂ → 3 CO₂ + 4 H₂O

is a combustion reaction

Explanation:

In a combustion reaction a chemical substance (usually organic substances) are reacted with oxygen to form the most stable oxides and heat.

CH₄ + 2 O₂ → CO₂ + 2 H₂O

In a double displacement reaction two compounds exchange elements.

AB + CD → AC + BD

In a decomposition reaction a compound is split into simpler substances.

AB →  A + B

In a synthesis reaction two elements are combined to form another compound. A + B → AB

In a single displacement reaction a compound exchange one of its elements.

AB + C → AC + B

Learn more about:

types of chemical reactions

brainly.com/question/314641

#learnwithBrainly

8 0
3 years ago
Match the following associations. Exothermic or endothermic
Alekssandra [29.7K]

<u>Answer:</u>

<em>1) ∆H is positive \Rightarrow Endothermic </em>

<em>2) E_p>E_r \Rightarrow Endothermic  </em>

<em>3) Energy is absorbed \Rightarrow Endothermic </em>

<em>4) E_r>E_p \Rightarrow Exothermic </em>

<em>5) ∆H is negtive \Rightarrow Exothermic </em>

<em></em>

<u>Explanation:</u>

∆H is called as enthalpy change  

It is also called as Heat of reaction

Energy is required for the bond to break a bond.

Energy is released when a bond is formed.

H_2+Cl_2>2HCl

that is

H-H+Cl-Cl>2H-Cl

We see in this equation, bonds between hydrogen and chlorine molecules gets broken and on the right side bond is formed in HCl.

If energy of products greater than energy of reactants then the reaction enthalpy change is endothermic .

If energy of products lesser than energy of reactants then the reaction enthalpy change is exothermic .

For example  

\Delta H=E_p-E_r

=30KJ-20KJ

=+10KJ

(positive hence endothermic)

\Delta H=E_p-E_r

=10KJ-40KJ

=-30KJ

(negative hence exothermic)

8 0
3 years ago
Acid rain damaging marble<br><br> a<br> Chemical Change<br> b<br> Physical Change
Dmitriy789 [7]

Answer:

B

Explanation:

Acid rain

damaging a marble statue or anything else

is a physical change. <3

8 0
2 years ago
What is one reason that scientists who study weather need extremely advanced technology?
Anton [14]

Answer: C) To monitor weather event restricted several days in advance.

Explanation:

5 0
3 years ago
Read 2 more answers
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