A 30.00 mL solution of 0.100M benzoic acid, a monoprotic acid, is titrated with 0.100M NaOH. The Ka is 6.3x10^-5. Determine the pH of the solution after the volumes of NaOH given were added. a. 0ml b. 10.00ml c. 30.00ml d. 40.00ml

Answers

Answer 1

Answer: a. 0ml because the following reaction occurs at STP: 2H₂O(l) → 2H₂(g) + O₂(g). How many liters of hydrogen gas can be produced by the breakdown of 72 grams of Ludovic I .

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Which of these statements best explains how fossil records provide evidence to the scientific theory of evolution?A.They show how natural selection happened on Earth by chance.
B.They show how organisms choose to adapt to changing Earth conditions.
C.They prove that structure and location of remains of organisms depict past events.
D.They prove that natural selection always leads to greater complexity in organisms.
z

Answers

your answer would be C

hope i helped

Sort the following molecules according to increasing bond angles about the central atom: CCl4,SCl2,AlCl3, 3. CCl 4 ,SCl 2 ,AlCl 3 ,S 3 . A) AlCl3,CCl4,S3,SCl2AlCl 3 ,CCl 4 ,S 3 ,SCl 2 B) CCl4,SCl2,AlCl3,S3CCl 4 ,SCl 2 ,AlCl 3,S 3 C) 3,SCl2,AlCl,CCl4S 3 ,SCl 2 ,AlCl 3 ,CCl 4 D) S3ACl3,SCl2,CCl4S 3 ,AlCl 3 ,SCl 2 ,CCl 4

Answers

Final answer:

The molecules AlCl3, CCl4, SCl2, and S3 have different geometries and bond angles due to the number of electron bonding pairs. As such, by increasing bond angles, the order is SCl2 < CCl4 < AlCl3 < S3.

Explanation:

The question asks us to sort the molecules AlCl3, CCl4, SCl2, and S3 by increasing bond angles about the central atom. To do this, we need to examine the geometry and the bond angles produced by the electronic arrangements of each molecule.

In AlCl3, the central atom, Al, has three bonded pairs of electrons resulting in a trigonal planar structure with bond angles of 120°. In CCl4, carbon is the central atom, and it forms four bonds with chlorine atoms, creating a tetrahedral structure. The bond angle for this molecule is approximately 109.5°. For SCl2, sulfur forms two bonds and has two lone pairs of electrons. The VSEPR model predicts a bent or V shape for the molecule, resulting in bond angles less than 109.5°. Lastly, S3 is a non-polar molecule with bond angles of 120°.

Therefore, the correct order of increasing bond angles would be SCl2 < CCl4 < AlCl3 < S3.

Learn more about molecular geometry here:

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Which is evidence that scientists use to support the big bang theory? A.
There is constant cosmic background radiation.

B.
Galaxies are moving toward each other.

C.
A loud explosion can be heard in the radio frequencies everywhere in the universe.

D.
Hydrogen and helium are the most abundant elements in the universe.

Answers

The right answer for the question that is being asked and shown above is that: "C. A loud explosion can be heard in the radio frequencies everywhere in the universe." The evidence that scientists use to support the big bang theory is that A loud explosion can be heard in the radio frequencies everywhere in the universe.

Provide a balanced equation for the reaction between lead nitrate and sodium chloride

Answers

Answer:

Pb(NO3)2 + 2NaCl = PbCl2 + 2NaNO3

Explanation:

Lead nitrate is Pb(NO3)2

Sodium Chloride is NaCl

The basic reaction is:

Pb(NO3)2 + NaCl = PbCl2 + NaNO3

Now we need to balance the equation. Note that the lead nitrate contributes 2 (NO3) units, but there is only 1 NO3 on the product side. So start by adding a second NaNO3:

Pb(NO3)2 + NaCl = PbCl2 + 2NaNO3

Now we have 2 Na atoms on the right side, so add a "2" to the NaCl:

Pb(NO3)2 + 2NaCl = PbCl2 + 2NaNO3

This is starting to look good. Lets check the atom/unit counts on both sides of the equation:

Reactants Products

Pb 1 1

NO3 2 2

Na 2 2

Cl 2 2

The equation is now balanced. Pb(NO3)2 + 2NaCl = PbCl2 + 2NaNO3

A change in which property of light will have no effect on whether or not the photoelectric effect occurs??? Frequently energy intensity and wavelength

Answers

Intensity has no affect on whether or not the photoelectric effect occurs. The determining property is frequency and since frequency and wavelength are inversely proportional, wavelength matters as well. If a frequency of light can't cause the photoelectric effect to happen, no matter what the intensity is, the light can't make it happen.

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

Answer: your answer is intensity

Explanation: your welcome

Can you help answer #10 please?

Answers

Just like in algebra, coefficients are before the variable, in chemistry it's before the element name/letters. So in 2Al, 2 is the coefficient.

Subscripts are the small numbers (sub) that you see after the element letters. In H2, the subscript is 2.

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You may normally expect a slow reaction if a low activation energy is required.