I have no idea what to do or how to do it?

Answers

Answer 1

Answer: 10) In order to find the conjugate acid of a chemical you just add a hydrogen to the chemical.
examples: the conjugate acid of Cl⁻ is HCl, the conjugate acid of PO₄³⁻ is HPO₄²⁻, the conjugate acid of NH₃ is NH₄⁺, the conjugate acid of HCO₃⁻ is H₂CO₃, and the conjugate acid of H₂O is H₃O⁺
To find the conjugate base of a chemical you just reverse that process (take away a hydrogen).
examples: the conjugate base of H₂SO₄ is HSO₄⁻, the conjugate base of CH₃COOH is CH₃COO⁻, the conjugate base of H₃PO₄ is H₂PO₄⁻, and the conjugate base of H₂O is OH⁻.

When you identify conjugate acids and bases in a reaction you look to see what lost a proton and what gained a proton. The chemical that gave up the proton acted as an acid and produced a conjugate base while the chemical that accepted a proton produced a conjugate acid.
Example: HCl+NaOH⇒NaCl+H₂O The acid is HCl and its conjugate base is Cl⁻ while NaOH was the base and H₂O is the conjugate acid. (you can ignore the sodium since it is a spectator ion).

11) When completing acid base reactions, need to identify the acid and the base since the acid will give a proton the base creating a conjugate base of the acid and conjugate acid of the base. (You need to balance the equation after you determine what the products will be)
example: H₂SO₄+2NaOH⇒Na₂SO₄+2H₂O (SO₄²⁻ is the conjugate base of HSO₄⁻ which is the conjugate base of H₂SO₄. HSO⁻ is created with the first NaOH molecule and then SO₄⁻ is created with the second NaOH.)

12) All acid base reaction form a salt consisting of the cation from the base and anion from the acid.
examples: NaCl could have come from NaOH reacting with HCl. K₃PO₄ could have come from KOH and H₃PO₄.

13) I don't really know how you are supposed to solve it with out knowing the Ka value of H₂S. H₂S is a weak acid and therefore will not dissociate completely in water so the only way of being able to find the concentration of H⁺ ions that dissociate is knowing the Ka value of H₂S and using ice tables. (Ka=[H⁺][A⁻]/[HA] and is basically the equilibrium constant for the acid when put into water where A⁻ is the conjugate base and HA is the acid).

14) Ca(OH)₂ is a strong base and will therefore dissociate completely in water. That means that when you find the concentration of OH⁻ in solution you can multiply that by the volume of the solution (in liters) to find the number of moles of OH⁻. Then you can divide that by 2 to find the number of moles of Ca(OH)₂ needed. pOH=14-pH which means that pOH=4.2. [OH⁻]=10^-pOH which means [OH⁻]=6.3x10^-5 M. 6.3x10^-5Mx3.00L=1.89x10^-4mol OH⁻ which means that (1.89x10^-4)/2=9.46x10^-5mol Ca(OH)₂.

I hope this helps. Let me know if anything is unclear.

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The study of chemicals containing carbon is traditionally called what type of 18?a. inorganic
c. analytical
b. bio
d. organic

Answers

The study of chemicals and molecules that contain carbon is usually called organic chemistey

Which of the following is NOT a pure substance?a. solution
b. element
c. molecule
d. compound

Answers

Answer:

A) Solution

Explanation:

Final answer:

A solution is not a pure substance, while elements, molecules, and compounds are examples of pure substances. The correct option is A.

Explanation:

The correct answer is a. solution. A solution is a mixture of two or more substances, so it is not a pure substance. Examples of solutions include saltwater and sugar water. On the other hand, elements, molecules, and compounds are all examples of pure substances. An element is a substance that cannot be broken down into simpler substances, such as gold or oxygen. A molecule is a combination of two or more atoms held together by chemical bonds, like water (H₂O) or carbon dioxide (CO₂). Lastly, a compound is a substance made up of two or more different elements chemically bonded together, like table salt (NaCl) or water (H₂O).

Learn more about pure substances here:

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How do isotopes of a given element differ? How am they similar?

Answers

Isotopes of a given element differ from one another based on the number of neutrons those atoms of the same element have. They are similar as they are the same element, given to us as they all have the same atomic number, but different in the number of neutrons they possess, which ultimately affects the atomic mass or mass number of that said isotope.

How many moles of h2o are produced when 3.25 moles of o2 react in 2c2h6 + 7o2 ---> 4co2 + 6h2o

Answers

Answer:

2.78 moles of water are produced.

Explanation:

Given data:

Number of moles of H₂O produced = ?

Number of moles of oxygen react = 3.25 mol

Solution:

Chemical equation:

2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O

Now we will compare the moles of water with oxygen.

O₂ : H₂O

7 : 6

3.25 : 6/7×3.25 = 2.78 mol

The central core of an atom is called thea. reactor vessel.
b. neutron.
c. proton.
d. nucleus.

Answers

Answer:

The central portion is called neutron.

Explanation:

An atom has a central part known as nucleus and outer shells.

The central nucleus contains protons (the positively charged sub atomic particle) and neutrons (the neutral sub atomic particle).

The outer portion has negatively charged sub atomic particle known as electrons.

The atomic number of an element is the number of protons present in the nucleus.

Answer:

The Answer is Nucleus

Explanation:

The Nuleus is the brain of the atom always like the "boss"

A compound contain only carbon, Hydrogen, Oxygen. Mass percentage of carbon is 52.2%, relative molecular mass of compound is 46, Find how many hydrogen atom present

Answers

Answer:

Six

Explanation:

Mᵣ = 46

Aᵣ(C) = 0.522 × 46 = 24

Difference = 22

Less 1 O = -16

Aᵣ(H) = 6

The relative atomic mass of the H atoms is 6.

The molecule contains six hydrogen atoms.

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With #27. if you can do at least two and explain how THANK YOU