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3 years ago

Is this equation completely balanced? 2C8H8 + 25O2 8CO2 + 18H2O

Chemistry

2 answers:

lianna [129]3 years ago

4 0

Answer: Option (A) is the correct answer.

Explanation:

For an equation to be completely balanced, there should be equal number of reactants and products.

In the given equation.

$2C_{8}H_{8} + 25O_{2}\rightarrow 8CO_{2} + 18H_{2}O$

Number of carbon atoms on reactant side = 16

Number of hydrogen atoms on reactant side = 16

Number of oxygen atoms on reactant side = 50

Number of carbon atoms on product side = 8

Number of hydrogen atoms on product side = 36

Number of oxygen atoms on product side = 34

Hence, we can conclude that total number of reactants does not equal total number of products therefore, this equation is not completely balanced.

goblinko [34]3 years ago

3 0

<span>A.No, because the number of carbon, hydrogen & oxygen atoms on both sides of the equation are not equal</span>

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A student did an experiment to determine the specific heat capacity of a metal alloy. The student put a sample of the alloy in b

guapka [62]

Answer:

a) ∆T=T1-T2

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c) The state in which two substances in physical contact do not share any heat energy. The temperature of two substances in thermal equilibrium is said to be the same. Also see thermodynamics.

Explanation:

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2 years ago

A phosphate buffer is involved in the formation of urine. The developing urine contains H2PO4 and HPO42- in the same concentrati

Katen [24]

Answer:

The ionization equation is

$H_{2}PO_{4}^{-} +H_{2}O$ ⇄ $HPO_{4}^{-2} +H_{3}O^{+}$ (1)

Explanation:

The ionization equation is

$H_{2}PO_{4}^{-} +H_{2}O$ ⇄ $HPO_{4}^{-2} +H_{3}O^{+}$ (1)

As the Bronsted definition sais, an acid is a substance with the ability to give protons thus, H2PO4 is the acid and HPO42- is the conjugate base.

The Ka expression is the ratio between the concentration of products and reactants of the equilibrium reaction so,

$Ka = \frac{[HPO_{4}^{-2}] [H_{3}O^{+}]}{[H_{2}PO_{4}^{-}] [H_{2}O]} = 6.2x10^{-8}$

The pKa is

$-Log (Ka) = -Log (6.2x10^{-8}) = 7.2$

The pKa of H2CO3 is 6,35, thus this a stronger acid than H2PO4. The higher the pKa of an acid greater the capacity to donate protons.

In the body H2CO3 is a more optimal buffer for regulating pH due to the combination of the two acid-base equilibriums and the two pKa.

If the urine is acidified, according to Le Chatlier's Principle the equilibrium (1) moves to the left neutralizing the excess proton concentration.

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3 years ago

Mathias Schleiden, one of the writers of the cell theory, studied _________ tissue and noticed that every sample he looked at wa

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2 years ago

Read 2 more answers

How to find the Ka of an acid?

bonufazy [111]

We know that acids have a pH of under 7.

We also need to:
Set up an ICE table for the chemical reaction. Solve for the concentration of H3O+ using the equation for pH Use the concentration of H3O+ to solve for the concentrations of the other products and reactants.

7 0

2 years ago

Find the volume of a gold ring that has a mass of 12.00 grams. The density of gold is 19.30 g/mL. The volume is

kozerog [31]

Answer:

<h3>The answer is 0.622 mL</h3>

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

$volume = \frac{mass}{density} \\$

From the question

mass = 12 g

density = 19.30 g/mL

We have

$volume = \frac{12}{19.30} \\ = 0.62176165...$

We have the final answer as

Hope this helps you

3 0

3 years ago