1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
pshichka [43]
3 years ago
8

Someone please help me

Chemistry
1 answer:
Ymorist [56]3 years ago
7 0
The correct answer is B.14.007
You might be interested in
"Give an explanation of the combustion reaction of octane."
SIZIF [17.4K]

Thus we can balance the oxygen atoms by putting a prefix of 25/2 on the left side. To obtain a equation containing whole numbers, we multiply the entire equation by 2. This gives the final equation. 2 C8H18 + 25 O2 ---> 16 CO2 +18 H2O.

6 0
3 years ago
A _______ is a segment of DNA that contains the information necessary to express the inherited traits of an organism. A. protein
Ilya [14]

Answer:

"gene" is the segment of DNA containg the inheritance information.

6 0
3 years ago
Given these reactions, X ( s ) + 1 2 O 2 ( g ) ⟶ XO ( s ) Δ H = − 668.5 k J / m o l XCO 3 ( s ) ⟶ XO ( s ) + CO 2 ( g ) Δ H = +
qwelly [4]

<u>Answer:</u> The \Delta H^o_{rxn} for the reaction is -1052.8 kJ.

<u>Explanation:</u>

Hess’s law of constant heat summation states that the amount of heat absorbed or evolved in a given chemical equation remains the same whether the process occurs in one step or several steps.

According to this law, the chemical equation is treated as ordinary algebraic expressions and can be added or subtracted to yield the required equation. This means that the enthalpy change of the overall reaction is equal to the sum of the enthalpy changes of the intermediate reactions.

The given chemical reaction follows:

X(s)+\frac{1}{2}O_2(g)+CO_2(g)\rightarrow XCO_3(s)      \Delta H^o_{rxn}=?

The intermediate balanced chemical reaction are:

(1) X(s)+\frac{1}{2}O_2(g)\rightarrow XO(s)    \Delta H_1=-668.5kJ

(2) XCO_3(s)\rightarrow XO(s)+CO_2     \Delta H_2=+384.3kJ

The expression for enthalpy of the reaction follows:

\Delta H^o_{rxn}=[1\times \Delta H_1]+[1\times (-\Delta H_2)]

Putting values in above equation, we get:

\Delta H^o_{rxn}=[(1\times (-668.5))+(1\times (-384.3))=-1052.8kJ

Hence, the \Delta H^o_{rxn} for the reaction is -1052.8 kJ.

7 0
3 years ago
Name the plant cell organelle where<br> photosynthesis occurs.
Alexeev081 [22]

Answer:

chloroplast organelle

Answer. The photosynthesis process takes place in the chloroplast organelle in the growing tissues. As the chlorophyll pigment is available in the chloroplast organelle which is the main photosynthetic pigment, with the help of the molecules they capture the energy of light.

Explanation:

chloroplasts

In plants, photosynthesis takes place in chloroplasts, which contain the chlorophyll. Chloroplasts are surrounded by a double membrane and contain a third inner membrane, called the thylakoid membrane, that forms long folds within the organelle.

6 0
3 years ago
Read 2 more answers
Calculate the mass percent of oxygen in CO2<br> (Work shown)
Genrish500 [490]

Answer:

mass \: of \: CO _{2}  = (12 + (16 \times 2)) = 44 \: g \\ mass \: of \: oxygen \: in \: CO _{2} = (16 \times 2) = 32 \\ \% \: of \: oxygen =  \frac{32}{44}  \times 100\% \\  = 72.7\%

4 0
2 years ago
Other questions:
  • What doe the elements in these groups have in common? a)alkali metals b) halogens c) noble gases
    8·1 answer
  • A 2.567-g sample of a monoprotic acid was dissolved in water. It took 15.24 mL of a 0.1578 M NaOH solution to neutralize the aci
    8·1 answer
  • I need Friend.<br><br><br><br><br><br>Follow me<br>​
    9·2 answers
  • How many bonds does Potassium Iodide have?
    9·1 answer
  • If the amount of a gas increases while temperature and pressure of gas are constant, you predict that the volume of the gas ___.
    6·1 answer
  • Why dil. sulphuric acid cannot be used instead of dil.hcl in lab preparation of carbon dioxide gas?​
    8·1 answer
  • How the glass is made up off?
    13·1 answer
  • Which statement is not true for a magnetic field?
    15·2 answers
  • What is always formed when a strong acid solution reacts with a strong base solution?
    14·1 answer
  • 1) In the boxes below, draw the model given in the simulation and draw a model of the molecules in an object when the object
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!