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3 years ago

Explain why, in a balanced chemical equation C + O2 CO2, we know that 1 gram of C will not react exactly with 1 gram of O2.

Chemistry

1 answer:

Pepsi [2]3 years ago

5 0

Answer:

See the answer below

Explanation:

From the equation, 1 mole of C requires 1 mole of O2 for a balanced reaction.

<u>1 g of C will not exactly react with 1 g of O2 because the 1 g of each of the reactants contain different amounts of the substance.</u>

The amount (in moles) of a substance is the mass of that substance divided by the molar mass.

<em>Hence, 1 g of C will contain 1/12 moles of the substance while 1 g of O2 will contain 1/32 moles of the substance. </em>

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describe why emission spectroscopy is a helpful tool in determining the identity of materials in fields like forensic science

IrinaVladis [17]

Answer:

Emission spectroscopy is a helpful tool in determining the identity of materials in fields like forensic science because it has the ability to identify and characterize the elements in a sample obtained for forensic analysis. It accomplishes this by making the sample go through a medium that can disperse the atoms and ions in the element at specified wavelengths.

Explanation:

Atomic emission spectroscopy is a method used in the laboratory to characterize the elements found in a sample needed for a study when they pass through a flame. Inductively coupled plasma is a type of atomic emission spectroscopy which has the ability to excite the components of an element at specific wavelengths when they undergo electromagnetic radiation.

This method can identify the isotopes, atom, and ions present in a sample. This is useful in forensics as it aids the identification of the elements in the sample.

4 0

3 years ago

According to the molecular orbital energy-level diagram below, which one of the following statements is not correct about NO, NO

Lubov Fominskaja [6]

None of the statement is not correct about NO, NO+, and NO−.

Explanation:

Those molecules whose all subshells are completely filled are diamagnetic.

Those molecules whose any sub-shell is incomplete is termed paramagnetic.

Let us check the magnetism in all three molecules based on molecular orbital theory and Lewis structure

NO= number of electrons 11

It form N=O having configuration 1s2,2s2,2p6,3s1, it has 1 unpaired electron so it is paramagnetic.

Now NO-, number of electrons 12 having configuration 1s2,2s2,2p6,3s2, no unpaired electron hence dimagnetic.

Now NO+, number of electrons is 10 having configuration 1s2,2s2,2p6,3s2, dimagnetic

Let us calculate the bond order of NO-

N0- have 12 electrons as 5 of nitrogen, 6 of oxygen and 1 of - charge on oxygen.

So, bond order = $\frac{8-4}{2}$

= 2 double bonds

bond order of NO+, Number of electrons is 10

bond order= $\frac{8-2}{2}$

bond order = 3

bond order of NO, number of electrons 11

bond order= $\frac{8-3}{2}$

bond order=2.5

Larger the bond order shorter the bond.

4 0

4 years ago

1. Write the chemical formula for possium (IV) oxyalide.

sashaice [31]

I don’t know what your talking about
Answerr
Explaination

4 0

3 years ago

Read 2 more answers

What volume of H2O is formed at stp when 6.0g of Al is treated with excess NaOH?

Ne4ueva [31]

Answer : The volume of $H_2O$ is 14.784 L.

Solution : Given,

Mass of Aluminium = 6 g

Molar mass of Aluminium = 27 g/mole

First we have to calculate the moles of aluminium.

Moles of Al = $\frac{\text{ Given mass of Al}}{\text{ Molar mass of Al}}=\frac{6g}{27g/mole}=0.22moles$

The given balanced reaction is,

$2NaOH+2Al+6H_2O\rightarrow 2NaAl(OH)_4+3H_2$

From the reaction, we conclude that

2 moles of Al react with the 6 moles of $H_2O$

0.22 moles of Al react with $\frac{6}{2}\times 0.22=0.66moles$ of $H_2O$

At STP, 1 mole contains 22.4 L volume

As, 1 mole of $H_2O$ contains 22.4 L volume of $H_2O$

0.66 moles of $H_2O$ contains $(22.4)\times (0.66)=14.784L$ volume of $H_2O$

Therefore, the volume of $H_2O$ is 14.784 L.

8 0

3 years ago

Zinc reacts with excess hydrochloric acid to produce zinc chloride and hydrogen gas. What happens to the reaction rate if you in

agasfer [191]

The correct response I believe is D. The reaction rate increases because the probability of collisions increases as there are more Zn atoms to react.

4 0

4 years ago

Read 2 more answers