An experiment produced 0.10 g CO2, with a volume of 0.056 L at STP. If the accepted density of CO2 at STP is 1.96 g/L, what is the approximate percent error?

Answers

Answer 1

Answer: According to the accepted density of CO2, we can get that 0.10 g CO2 has a volume of 0.10/1.96=0.051 L (theoretical value). The percent error = (0.056 - 0.051)/0.051 * 100% = 9.80%.

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Answers

Answer:

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In the chemical equation Zn + 2HCl ZnCl2 + H2, the reactants are A. zinc and hydrochloric acid.
B. zinc and hydrogen carbonate.
C. zinc chloride and hydrogen.
D. zinc chlorate and water.

Answers

In the chemical reaction: Zn + 2HCl -> ZnCl₂ + H₂, the reactants are zinc, Zn and hydrochloric acid, HCl (Option A)

How to determine the reactants in the reaction?

Chemical equations are representation of chemical reactions with symbols and formula of elements involved in the reaction.

Every chemical equation has two sides. These are:

Reactants: They are located on the left hand side of the equation
Products: They are located on the right hand side of the equation

With the above information, we can determine the reactants of the chemical equation. This is shown below:

Chemical reaction: Zn + 2HCl -> ZnCl₂ + H₂
Reactant =?

Reactants => They are located on the left hand side of the equation

=> Zn and HCl

Thus, the correct answer to the question is: zinc and hydrochloric acid (option A)

Learn more about reactants in reaction:

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The answer is A ( and the answer for the products is C )

Who wrote the banned book that Giordano Bruno read that gave him the idea that the universe was infinite?

Answers

steven soter was the one who wrote the book that gave Giordano Bruno the idea that unverse was infinite

How many grams are in 0.02 moles of beryllium iodide, Bel2?

Answers

This set up of a conversion table should show you that if you multiply the grams of BeI2 times .02 moles, it equals 5.256 g (your answer)

Which of the following species has the greatestnumber of electrons?
1. Cl1−
2. Co4+
3. Fe2+
4. V
5. Sc2−

Answers

Answer: Option (3) is the correct answer.

Explanation:

When there is a negative charge on an atom then we add the charge with the number of electrons. Whereas when there is a positive charge on an atom then we subtract the charge from the number of electrons.

Atomic number of chlorine is 17. So, number of electrons present in $Cl^(-)$ is 17 + 1 = 18 electrons.

Atomic number of cobalt is 27. So, number of electrons present in $Co^(4+)$ is 27 - 4 = 23 electrons.

Atomic number of iron is 26. So, number of electrons present in $Fe^(2+)$ is 26 - 2 = 24 electrons.

Atomic number of vanadium is 23. So, number of electrons present in V is 23 electrons.

Atomic number of scandium is 21. So, number of electrons present in $Sc^(2-)$ is 21 + 2 = 23 electrons.

Thus, we can conclude that out of the given species, $Fe^(2+)$ has the greatest number of electrons.

Among the given species, $\boxed{3.{\text{ F}}{{\text{e}}^(2 + )}}$ has the greatest number of electrons.

Further Explanation:

The arrangement of electrons in various shells and sub-shells of an atom is called electronic distribution. The electron filling is done by keeping following rules and principles in mind:

(i). Aufbau principle

According to this, electron filling takes place in orbitals in the increasing order of their respective energies. The energy order of orbitals is as follows:

$1s < 2s < 2p < 3s < 3p < 4s < 3d < 4p < 5s < 4d < 5p < 6s < 4f < 5d < 6p < 7s < 5f < 6d < 7p$

(ii) Hund’s rule

No electron will b epaired until each orbital is singly occupied.

(iii) Pauli’s exclusion principle

It states that two electrons can never have all the four quantum numbers same. The value of spin quantum number for both electrons must b edifferent.

1. According to the periodic table, the atomic number of Cl is 17 so its electronic configuration is $1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^7}4{s^2}$ . It gains an electron to form ${\text{C}}{{\text{o}}^(4 + )}$ ion and its configuration becomes $1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^5}$ . So it has a total of 18 electrons.

2. According to the periodic table, the atomic number of Co is 27 so its electronic configuration is $1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^7}4{s^2}$ . It loses four electrons, two 4s electrons and two 3d electrons to form ion and its configuration becomes $1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^5}$ . So it has a total of 23 electrons.

3. According to the periodic table, the atomic number of Fe is 26 so its electronic configuration is $1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^6}4{s^2}$ . It loses two 4s electrons to form ${\text{F}}{{\text{e}}^(2 + )}$ ion and its configuration becomes $1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^6}$ . So it has a total of 24 electrons.

4. According to the periodic table, the atomic number of V is 23 so its electronic configuration is $1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^3}4{s^2}$ . So it has a total of 23 electrons.

5. According to the periodic table, the atomic number of Sc is 21 so its electronic configuration is $1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^1}4{s^2}$ . It gains two electrons to form ${\text{S}}{{\text{c}}^(2 - )}$ ion and its configuration becomes $1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^3}4{s^2}$ . So it has a total of 23 electrons.

Therefore, the maximum number of electrons is present in ${\text{F}}{{\text{e}}^(2 + )}$ (24).

Learn more:

Determine the ion with configuration : brainly.com/question/7599542
Identification of element which has electron configuration :brainly.com/question/9616334

Answer details:

Grade: High School

Chapter: Electronic configuration of the elements

Subject: Chemistry

Keywords: electrons, Cl-, Co4+, Fe2+, V, Sc2-, 17, 27, 26, 21, 23, electronic configuration.

What would happen if more of the sun's heat became trapped in earth's atmosphere,and less heat was released into space

Answers

maybe the sun would burn down things and create pollution

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