Which of the following compounds is a structural isomer of butane?a. 2-methylbutane
c. 2-methylpropane
b. 2,2-dimethylbutane
d. 2,2-diethylpropane

Answers

Answer 1

Answer:

The compound that is a structural isomer of butane is 2 – methylpropane. Note that butane has four carbon atoms. In 2 – methylpropane, propane has three carbon atoms and methyl is attached at the second carbon. Methyl has only one carbon atom and together, they have a total of four carbon atoms. An isomer is a substance that has the same number of atoms but they differ in their structure. The answer is letter C.

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Your mom is playing the drums in the basement. Whenever she hits the drum with all her force, the box next to the drums shakes, rattles and almost rolls. What is occurring? A frequency B diffraction C resonance D interference

Answers

it’s “a”, frequency because the sound waves will cause vibrations in object close by

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

What is the volume of solution needed to make a 0.5M solution, using 250g of NaCl

Answers

1 mole of NaCl has (23+35.5)g= 58.5g

Therefore, to make 1M/L of solution you will need 58.5g Then to make 0.5M/L you will need 58.5/2=29.25g

If to make 1liter of 0.5M one will need 29.25 grams of NaCl, then250g of NaCl will make

(250g×1L)/29.25g= 8.547liters

In which part of the Milky Way galaxy is our sun located?halo
bulge
center
spiral

Answers

The Sun's location in the Milky Way, specifically in the Orion Arm, about 26,000 light years from the center.

Our Sun is located in the spiral part of the Milky Way galaxy. More specifically, it is found in one of the galaxy's spiral arms, known as the Orion Arm, or sometimes the Orion Spur.

The Milky Way consists of several components: the halo, bulge, disk, and spiral arms. The center, or bulge, contains older stars and a supermassive black hole. The halo contains globular clusters, while the disk contains stars of various ages, gas, dust, and the spiral arms, which have a higher density of gas and dust.

In contrast, our Sun is located about 26,000 light years from the center in the disk, residing in one of the spiral arms where star formation is quite active.

Learn more about Sun's location in the Milky Way here:

brainly.com/question/23304702

#SPJ6

it is located in the center

The acid-dissociation constant, Ka, for benzoic acid is 6.5 × 10-5. Which will you use to calculate the base-dissociation constant, Kb, for the conjugate base of benzoic acid?

Answers

Answer:

The base-dissociation constant, Kb,for the conjugate base of benzoic acid is :

$K_(b)=1.54* 10^(-10)}$

Explanation:

The product of acid dissociation constant and base dissociation constant is equal to the water dissociation constant.The general formula for the reaction is:

$K_(w)=K_(a)K_(b)$

For the acid dissociation reaction:

$HA + H_(2)O\rightleftharpoons H^(+)+A^(-)$

The conjugate base for the acid is A-

The acid is HA . and its Ka is given.

The value of Kw is fixed at a given temperature , which is equal to:

$K_(w)=10^(-14)$

$K_(a)=6.5* 10^(-5)$

$K_(b)=(10^(-14))/(6.5* 10^(-5))$

$K_(b)=1.54* 10^(-10)}$

Answer:

Ka*kb=kw

Explanation:Got it right

Bond energy is related to bond length. Use the bond energy data below to arrange the bonds listed in order of increasing bond length (shortest to longest).Bond : Energy (kJ/mol)- C-C : 346
- C=C : 835
- C≡C : 612

Answers

Answer:

The order of increasing bond lenght :

-C≡C < -C=C < -C-C

Explanation:

Bond length is defined as average distance between two nuclei of bonded atoms in a molecule.Bond length is inversely proportional to the number of bonds present between two atoms.

$\text{Bond length} \propto \frac{1}{\text{Number of bonds}}$ ...[1]