i’m stuck on part b of this question :( this is from the ap chem textbook on pg. 35 just so u know. please help!

Answer:

The total volume of the solution at the end point of the titration is 17.0 mL

Explanation:

First we will write a balanced chemical equation for the reaction between HCl and NaOH.

HCl + NaOH    →    NaCl + H₂O

This means 1 mole of HCl will react with 1 mole of NaOH to give 1 mole of NaCl and 1 mole of H₂O

From the question,

Concentration of acid (HCl), [tex]C_{A}[/tex] = ??

Volume of acid (HCl), [tex]V_{A}[/tex] = 5.0 mL

Concentration pf base (NaOH), [tex]C_{B}[/tex] = 0.010 M

Volume of base (NaOH), [tex]V_{B}[/tex] = 12.0 mL

To determine the Concentration of acid, [tex]C_{A}[/tex]

From,

[tex]\frac{C_{A}V_{A} }{C_{B}V_{B} } = \frac{n_{A} }{n_{B} }[/tex]

Where [tex]n_{A}[/tex] is the mole ratio of acid

and [tex]n_{B}[/tex] is the mole ratio of base.

The concentration of the acid used can be determined from the above formula.

But, we are asked to find the total volume of the solution at the end point of the titration

The total volume of the solution will be the sum of the volume of HCl that reacted and volume of NaOH that reacted.

Hence, The total volume of the solution = [tex]V_{A} + V_{B}[/tex]

= 5.0 mL + 12.0 mL

= 17.0 mL

Hence, the total volume of the solution at the end point of the titration is 17.0 mL

Answer:

18.06 × 10²³ molecules

Explanation:

Add the two amounts of molecules together.

6.02 × 10²³  +  12.04 × 10²³  =  18.06 × 10²³

You will have 18.06 × 10²³ molecules in the vessel when the reaction is complete.  This is because of the Law of Conservation of Mass.  Mass is neither created nor destroyed in chemical reactions.  You will have the exact number of molecules in the reaction vessel as you did in the beginning.  The types of molecules may change, but the number will stay the same.

Answer: Dependant variable = The distance it takes for each car to stop.  Independent variable = Both cars go at 60 mph.

Explanation:

This is right because the dependant variable changes and the independent variable is the outcome of the dependant variable.

Answer:

Kingdom, phylum, class, order, family, genus, and species

Explanation:

Kingdom, phylum, class, order, family, genus, and species are the list used to classify organisms on the basis of similarities and differences. The largest group of classification is kingdom while the smallest group is the species. In each category, the  organisms which are present are similar to each other while different from one another in some characteristics.

Answer:

0.05 Liter

Explanation:

Conversion factor: 1/1000

1) Liter = Cubic Centimeter / 1000

2) Liter = 50 / 1000

3) Liter = 0.05

Answer: The Answer Is 3!

Answer:Is Fruit ripening dependent on the type of light exposed to?

Explanation: Because you can test this theory

Answer:

D

Explanation:

Answer:

D)  A chemical that's clear when basic and turns color when acidic is correct!

Explanation:

I got it right on a test!

Hope this Helps!! :))

Answer:

Ecosystem

Explanation:

I got the answer from the Mcgrawhill textbooks.

Answer:

It is important to collect all data first, or else your guesses could purely be the opposite of the right answer. If you make inferences of what might happen, your guesses may be purely fictional, and totally off-topic. During experiments, this step is important.

Answer:

D. Mass

Explanation:

Answer:

D

Explanation:

The number of neutrons in an atom affects the atomic mass number or atomic weight.

Answer:

5.26g

Explanation:

Please see attached picture for full solution.

Answer:

The Argon ([tex]Ar[/tex]) has this electron configuration.

Explanation:

The question is wrong. The correct electron configuration is :

[tex]1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}[/tex]

The electron configuration is the distribution of electrons of an atom or molecule in atomic or molecular orbitals.

The letters s,p,d and f are called the orbitals.

The numbers 1,2,3,4,5,6 and 7 are called the levels.

The maximum numbers of electrons that the s-orbital can hold is 2 electrons.

The maximum numbers of electrons that the p-orbital can hold is 6 electrons.

The maximum numbers of electrons that the d-orbital can hold is 10 electrons.

The maximum numbers of electrons that the f-orbital can hold is 14 electrons.

The order in which the orbitals are filled is :

1s-2s-2p-3s-3p-4s-3d-4p-5s-4d-5p-6s-4f-5d-6p-7s-5f-6d-7p-6f-7d-7f

To identify the electron configuration of an element we need to count and sum the exponents of its orbitals.

The electron configuration is :

[tex]1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}[/tex]

Has the following sum of exponents : [tex]2+2+6+2+6=18[/tex]

Therefore the total electrons of the element is 18 electrons.

The element that has 18 electrons is Argon ([tex]Ar[/tex])

Answer:

C) chlorine

Explanation:

edge 2023

Answer:

16.56g

Explanation:

6*2.76=16.56...

Answer:

16.56 grams

Explanation:

The density can be found using the following formula:

[tex]d=\frac{m}{v}[/tex]

If we rearrange the formula for m, the mass, we should multiply both sides by v.

[tex]d*v=\frac{m}{v} *v[/tex]

[tex]d*v=m[/tex]

The mass can be found by multiplying the density and the volume. The density is 2.76 grams per cubic centimeter. The volume is 6 cubic centimeters.

[tex]d= 2.76 g/c^3\\v=6 cm^3[/tex]

Substitute the values into the formula.

[tex]m= d*v[/tex]

[tex]m= 2.76 g/cm^3 * 6 cm^3[/tex]

Multiply. When you multiply the 2 "cm^3" will cancel each other out.

[tex]m= 2.76 g* 6[/tex]

[tex]m= 16.56 g[/tex]

The mass of the marble is 16.56 grams.

Answer:

The level of the water will be higher for 100g Al because occupy more space than gold.

Explanation:

To understand this problem, we must know Archimedes' principle:

"A body that is submerged in a fluid produce a bouyant force equal to the weight of the fluid that the body displaces". The volume of the body is equal to the volume displaced in the liquid.

Now, as gold is heavier than aluminium, 100g of Al have more volume than 100g of gold, than means:

Answer:

T = 561.3K

Explanation:

The translational kinetic energy of a gas such as nitrogen is obtained using the formula:

K = 3/2 * n * R * T

Where n  are moles of gases (1mole of N₂), R is gas constant (8.314J/molK)and T is absolute temperature (in K)

If the translational energy of the gas is 7.0x10³J:

7.0x10³J = 3/2 * 1 mole * 8.314J/molK * T

Answer:

Organs and senses.

Explanation:

The central nervous system includes the brain and spinal cord.

Your internal organs and your senses send signals to your brain and spinal cord.

Answer:

7) Example: Gravitational force

Gravitational force, also known as gravity, is a type of non- contact force.

10) Unbalanced forces can cause an object to accelerate, make a stationary object move, or cause a moving object to stop.

12) Gravitational force, Frictional force, Magnetic force

13) Friction is beneficial when we are walking as it prevents us from slipping.

For the table, find the net force first and that would help us to find the direction and the type of force (balanced/ unbalanced).

As written in Q11, add all the forces together to determine the net force acting on an object. More specifically, add the forces that act in one direction together. Then subtract the forces acting in the other direction.

Let's look at the teddy bear (Q14 -16):

Take note that we have to look at the direction of the arrow not which side the arrow is on (left/ right of the bear).

Total force acting towards the left

= 16 +7

= 23N

Total force acting on the right= 22N

Net force

= 23 -22

= 1N towards the left

Thus, 14) Unbalanced (since the net force is not 0N)

15) 1N

15) 1N16) left

Vase question:

Total downward force

= 11 +33

= 44N

Total upward force

= 25 +19

= 44N

Net force= 0N

17) Balanced

17) Balanced18) 0N

17) Balanced18) 0N19) No direction

Bicycle question:

Total force acting towards the right

= 65 +115

= 180N

Total force to the left= 170N

Net force

= 180 -170

= 10N to the right

20) Unbalanced

20) Unbalanced21) 10N

20) Unbalanced21) 10N22) To the right

Answer:

what's different about the particles in her hand are that for one are a solid in contrast to the ice cream which is partially liquid.

Answer:

It is important to note that iron, cobalt, and nickel which appear in period 4, of the transition metals, next to each other, share very similar physical and chemical properties and are known collectively as the iron triad

The comparison of the properties of iron includes

Chemical properties

1) Atomic number; The atomic number of iron is 26 while the atomic number of nickel is 28

2) The oxidation states of iron are 2, 3, 6 while the oxidation state of nickel are 2,3

3) The ionization energies in kJ/mol  are first 759, second 1561, and third 2957 for iron and first 737, second 1753, and third 3393 for nickel

Physical properties

1) The mass of iron is 55.85 with density = 7.87 g/cm³, the mass of nickel is 58.69 with density = 8.91 g/cm³

2) The melting point of iron is 1530°C, boiling point 2862°C and that of nickel are 1455°C and 2732°C

3) The electrical conductivity of iron is 16 and that of nickel is 23

Explanation:

The carbon element  combines chemically with oxygen and hydrogen to form a compound known as sugar. When making syrup, the sugar is dissolved in water to make a mixture . Before the sugar and water are mixed, the heterogenous  mixture is not the same sweetness throughout. After mixing, the solution homogenous is because when sugar is evenly disbursed throughout the water. Finally, the water is slowly boiled off and the solution slowly becomes sticky and gooey because the viscosity has increased and the solution now resists flowing.

A solution is a homogeneous mixture of two or more substances. A solution may exist in any phase. A solution consists of a solute and a solvent.

For the solutions, with components in the same phase, the substances present in lower concentration are solutes, while the substance present in higher concentration is the solvent.

Learn more about solutions, here:

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Answer:

10

Explanation:

a centimeter and a milimeter differ from each other by a factor of 10

Answer: 10

Explanation:

Answer:

D

Explanation:

If we put pressure on a solid or a liquid, there is essentially no change in volume.

Matter are anything that is made up of atoms. The quantity of matter can be observed only on the basis of mass and volume calculation. Therefore, the incorrect statement is option D that is there is a large decrease in the volume of a solid metal when pressure is applied to it.

Matter is a substance that has some mass and can occupy some volume. The matter is mainly used in science. Matter can be solid, liquid or gas.

Matter is anything that is made up of atoms. Anything around us that can be physically seen and touched are matter. Ice, water and water vapors are example of matter. When we apply pressure on solid, then there is no change in volume of the solid matter.

Therefore, the incorrect statement is option D that is there is a large decrease in the volume of a solid metal when pressure is applied to it.

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Answer:

platinum

Explanation:

the film on a hard drive platter contains platinum

Answer:

- sunlight heats the earth's surface

- climate change by trapping heat in the ozone layer

- increased wild fires

- food shortages due to higher temperatures

- they contribute to respitory disease due to smog and air pollution

(lol i'll be your friend)

Answer:

C-Electrical energy changed into mechanical energy

Explanation:

Energy, according to the law of conservation of energy, is said to neither be created or lost but only interchangeable from one form to another. Energy exists in different forms. The process by which one form of energy changes to another is called TRANSFORMATION of energy.

However, certain household appliances or devices bring about this transformation of energy. For example, in a case where Tony turns a fan on when his room becomes uncomfortably hot. The fan uses an electric source to get powered on, which then facilitates the blades of the fan to move fast in order to bring about a cool atmosphere.

The fan converts ELECTRICAL energy (electric source) into MECHANICAL energy (moving energy).

Answer:

yes

Explanation:

it change everything

im pretty sure the awnser is yes

Answer:

23 kgs = 809.6 ounces

Explanation:

given:

1 kg = 2.2 ibs

therefore, 23 kgs = 2.2*23 Ibs = 50.6 Ibs

since, 1 Ib = 16 ounces

therefore, 23 kgs = 50.6*16 ounces = 809.6 ounces

Given :

Mass of granite , m = 20 g .

Change in temperature , [tex]\Delta T=29-10=19^oC[/tex].

Specific heat capacity of granite , [tex]C=0.79\ J/g^oC[/tex] .

To Find :

The heat absorbed by granite .

Solution :

We know , heat absorb is given by :

[tex]\Delta H=mC\Delta T\\\\\Delta H=20\times 0.79 \times 19 \ J\\\\\Delta H=300.2\ J[/tex]

Therefore , heat absorb is 300.2 J .

Hence , this is the required solution .

Taking into account the definition of calorimetry, the heat absorbed is 300.2 J.

In first place, calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

Sensible heat is the amount of heat exchanged by a body without affecting its molecular structure. If you don't change the molecular structure, you don't change the state of aggregation. Since the molecular structure does not change, a change in temperature is observed.

In other words, sensible heat is the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).

So, the equation that allows to calculate heat exchanges is:

Q = c× m× ΔT

where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

In this case:

Replacing in the expression to calculate heat exchanges:

Q= 0.79[tex]\frac{J}{gC}[/tex]× 20 g× 19 C

Solving:

Q= 300.2 J

In summary, the heat absorbed is 300.2 J.

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