What is the pH of a 1 x 10^-5 M [OH-] solution

a. 3
b. 9
c. 5
d. 11

Answer:

72.6 mL

Explanation:

A quick way to solve this titration problem when you have a monoprotic acid is to use the Dilution equation, M1V1=M2V2.

.589(x)=.821(52.1)

X=72.6 mL

Answer:

B.) an elephant having the same trunk sizes and shapes as its parents

Explanation:

an inherited trait is genetically determined. inherited traits are coded in our DNA and hence can be passed on to the next generation.

0.4100 g - Rounding to four significant figures retains trailing zeros after the decimal point when followed by a non-zero digit.

Option (1) is correct.

In scientific notation, significant figures are digits that carry meaningful information about the precision of a measurement. When rounding a number to four significant figures, we consider the digits up to the fourth digit from the left (including trailing zeros after the decimal point).

In the given measurement, 0.41006 gram, we start counting from the left:

The first significant figure is "4."

The second significant figure is "1."

The third significant figure is "0."

The fourth significant figure is "0."

The fifth digit "6" is beyond the fourth significant figure, so we ignore it when rounding.

Since the fourth significant figure is "0," and it's followed by a digit greater than or equal to 5 (in this case, "6"), we round up the last significant figure. Hence, the measurement rounded to four significant figures is 0.4100 grams (option 1).

To learn more about trailing zeros  here

https://brainly.com/question/11745676

#SPJ2

If the pH of the acid at a given time is found to be 1.25, then the molarity  of the gastric acid juice is 0.056M.

pH is define as the negative logarithm of the concentration of H⁺ ions present in any solution and it will be represented as:

pH = -log[H⁺]

Concentration will be present in the form of molarity and pH value for gastric acid is given 1.25 means it is strong acid as it completely dissociates into their ions.

Required equation for calculation will be:

[H⁺] = [tex]10^{-pH}[/tex]

[H⁺] = [tex]10^{-1.25}[/tex]

[H⁺] = 0.056 M

Hence molarity of the gastric acid juice is 0.056M.

To know more about pH & molarity, visit the below link:

https://brainly.com/question/27298208

#SPJ1

Answer:

the ice cream falls down..therefore, it's kinetic energy while the melting part is heat energy

Answer:

You will be able to watch the slow dissolution of the nail (probably a steel nail and not iron) and the change in colour of the solution.

Explanation:

I believe not 100% sure.

Answer:

The chemical equation when Hexane is subjected to strong heat in the absence of air

Answer:

you work out the moles by finding the grand formula mass them you divide the actual mass by the grand formula mass: 25/160 (my grand formula mass is probably slightly different from yours) which I got 0.15625 then I times it by 32(O2) and I got 5. but my periodic table is different. it's whole numbers. ;-)

Explanation:

4.44

Answer: movement of Tectonic plates

Explanation: The tectonic plates are moving apart, on to the west and one to the east. As the plates move apart, volcanoes erupt and rift valleys are filled. During these events, earthquakes are common and magma rises up, creating a new oceanic crust.  

Answer:

Answer is d, strength of London forces increases with molecular size.

Explanation:

Dispersion forces are the forces preesnt between all intermingling atoms, molecules and particles. Dispersion forces are the weakest intermolecular force, but they build up with the addition of more atoms, molecules or particles. Heat of vapourisation or boiling point is dependant on the energy required to break the bonds within the molecule/hydrocarbon in question. The build up of dispersion forces create greater intermolecular forces, which make the boiling of a substance more difficult. Hence increased hydrocarbon chain length, and the related increased eat of vapourisation is due to how the strength of the London/Dispersion forces increases with molecular size

Answer:

Tangible

Explanation:

Tangible alone means it is "perceptible by touch," meaning you physically observe the object with your sense of touch.

Having tangible motivation is like working for money or a trophy.

Its b beacuse if you C4 its a high active poly faber

Explanation:

Im right

First if you have a data sheet you would compare the four peaks that are denoted by a,b,c and d and see if the number in which the peak falls alligns with a bond type present in the moecule. IR spectroscopy is used quite alot in organc chemistry so using my data sheet I'd assume that;

Peak D, likely represents a C-O bond (found in wavenumer range 1000-1300)

Peak C, likely represents a C-H bending vibrations (with wavenumber range 1400-1500)

Peak B, is likely a C=C bond, (with wavenumber range of 1620-1680

Peak A, is likely a C=O bond, (with wavenumber range of 1680-1750)

From here you could predict some possible molecules that the IR spectrum alligns with ie any molecules that are composed of C-H, C-O, C=O and C=C bonds, like an ester with an unsaturated carbon chain.

Answer:

throughout the metallic structure allowing the atoms to slide past each other. This sliding is why metals are ductile and malleable. Ionic compound must break bonds to slide past one another, which causes the ionic material to split and crack.

Explanation:

Hope this helps loves mark me brianlest x

Answer:

27.3 L

Explanation:

Reaction

Solving

27.3 L. N₂ (g) + 3H₂ (g) ⇒ 2NH₃ (g). 10 g N₂ x 1 mol NH₃/28 g N₂ x 3 mol H₂/1 mole N₂ ⇒ 1.07 mol H₂. V = nRT/P [From Ideal Gas Equation], V = 1.07 x 62.36 x 298 K / 735. V = 27.3 L

A non-flammable atmospheric gas called nitrogen makes about 78% of the earth's atmosphere.

Nitrogen is prized for its inert qualities when it is gaseous because it replaces air, which lessens or stops items from oxidizing. Additionally, it serves as a laser cutting assist gas.

Nitrogen is a perfect gas for cryogenic cooling and freezing because of the incredibly low temperatures at which it exists in its liquid state. Almost any industry can use nitrogen to increase yields and maximize performance. It makes it possible to utilize and store flammables safely while also preventing the explosion of combustibles.

Therefore, 27.3 L. N₂ (g) + 3H₂ (g) ⇒ 2NH₃ (g). 10 g N₂ x 1 mol NH₃/28 g N₂ x 3 mol H₂/1 mole N₂ ⇒ 1.07 mol H₂. V = nRT/P [From Ideal Gas Equation], V = 1.07 x 62.36 x 298 K / 735. V = 27.3 L.

To learn more about Nitrogen, refer to the link:

https://brainly.com/question/19938608

#SPJ2

Answer:

it pops because the heat and water inside of it

Explanation:

Answer:

when the corn is heated, the water turns into steam, which builds pressure inside the kernel. When it can no longer contain the pressure it pops.

Explanation:

Answer:

Thickness of foil = 0.004mm

Explanation:

V= length x width x height (height can also be known as the thickness 't')

0.5345=10.0 x (1.25÷10) x t

t=0.5345/10.0 x 12.5

t=0.004276mm

t=0.004mm

Explanation:

.

.mark it brainlist

Answer:The more air we pump into them the more squished the air has to become to fit inside the ball. As the air becomes more squished, it pushes more on the inside of the ball. When you have a ball which is more inflated, there is more force pushing on the inside of that ball. (We call that air pressure).

Explanation:

The amount of gas causes the change in pressure when a basketball is pumped up. The force delivered perpendicularly to an object's surface per unit area across where that force is dispersed is known as pressure.

The force delivered perpendicularly to an object's surface per unit area across where that force is dispersed is known as pressure (symbol: p / P). The pressure proportional to the surrounding air is known as gauge pressure, also spelt gauge pressure[a].

Pressure is expressed using a variety of units. Some of them come from dividing a unit of force by a measure of area; the pound-force / square inch and the newton every square metre (N/m2) are two examples. The standard international measurement of pressure, a pascal (Pa), is another. The amount of gas causes the change in pressure when a basketball is pumped up.

Therefore, the amount of gas causes the change in pressure when a basketball is pumped up.

To know more about pressure, here:

https://brainly.com/question/29341536

#SPJ7

A cleaning solution with an OH⁻ concentration of 2.5 × 10⁻⁴ mol/L, has a pH of 10.4 and is basic (options b and c).

The hydroxide ion concentration is 2.5 × 10⁻⁴ mol/L.

pOH = -log [OH⁻] = log (2.5 × 10⁻⁴) = 3.6

We will use the following expression.

pH + pOH = 14

pH = 14 - pOH = 14 - 3.6 = 10.4

Since pH > 7, the solution is basic.

A cleaning solution with an OH⁻ concentration of 2.5 × 10⁻⁴ mol/L, has a pH of 10.4 and is basic (options b and c).

Learn more about pH here: https://brainly.com/question/172153

#SPJ1

Answer:

See below

Explanation:

The equation shows    Al / Cl  = 2/3      or    3/2 Al = Cl

                                                                        3/2(20) = 30 Cl atoms needed

The equation shows a one-to-one relationship between Al and AlCl3

   produced     so if you use 20 Al atoms you get 20 AlCl3 molecules

The number of Cl₂ molecules needed to react with 20 aluminum atoms is approximately 11.97, and the number of units of aluminum chloride (AlCl₃) produced from 20 aluminum atoms is approximately 9.98.

Let's first calculate the number of molecules of chlorine gas (Cl₂) needed to react with 20 aluminum (Al) atoms:

From the balanced chemical equation: 2Al + 3Cl₂ ⟶ 2AlCl₃

The stoichiometric ratio between aluminum and chlorine gas is 2:3. This means for every 2 moles of aluminum, we need 3 moles of chlorine gas.

1 mole of any substance contains Avogadro's number (6.022 × 10²³) of particles (atoms, molecules, or ions).

Number of moles of aluminum (Al) atoms = 20 atoms / Avogadro's number

Number of moles of aluminum (Al) atoms = 20 / 6.022 × 10²³

Now, to find the number of molecules of chlorine gas (Cl₂) needed, we use the stoichiometric ratio:

Number of moles of chlorine gas (Cl₂) needed = (3/2) × Number of moles of aluminum (Al) atoms

Number of moles of chlorine gas (Cl₂) needed = (3/2) × (20 / 6.022 × 10²³)

Number of moles of chlorine gas (Cl₂) needed ≈ 1.988 × 10⁻²³ moles

Since 1 mole of any substance contains Avogadro's number of molecules, the number of molecules of chlorine gas (Cl₂) needed will be approximately:

Number of Cl₂ molecules ≈ 1.988 × 10⁻²³ × 6.022 × 10²³ ≈ 11.97

Now, let's calculate the number of units of aluminum chloride (AlCl₃) that can be produced from 20 aluminum (Al) atoms:

From the balanced chemical equation: 2Al + 3Cl₂ ⟶ 2AlCl₃

The stoichiometric ratio between aluminum and aluminum chloride (AlCl₃) is 2:2. This means for every 2 moles of aluminum, we get 2 moles of aluminum chloride.

Number of moles of aluminum chloride (AlCl₃) produced = Number of moles of aluminum (Al) atoms / 2

Number of moles of aluminum chloride (AlCl₃) produced = 20 / 2 / Avogadro's number

Number of moles of aluminum chloride (AlCl₃) produced ≈ 20 / (2 × 6.022 × 10²³)

Number of moles of aluminum chloride (AlCl₃) produced ≈ 1.658 × 10⁻²³ moles

Since 1 mole of any substance contains Avogadro's number of units (molecules or formula units), the number of units of aluminum chloride (AlCl₃) produced will be approximately:

Number of AlCl₃ units ≈ 1.658 × 10⁻²³ × 6.022 × 10²³ ≈ 9.98

Therefore, the number of Cl₂ molecules needed to react with 20 aluminum atoms is approximately 11.97, and the number of units of aluminum chloride (AlCl₃) produced from 20 aluminum atoms is approximately 9.98.

Lear more about aluminum from the link given below.

https://brainly.com/question/28989771

#SPJ2

Answer:

570.76 mmHg

Explanation:

multiply the atm value by 760.0 mmHg / atm.

760*.751=570.76

chemteaminfo

Answer:

from the ideal gas law, P2 /P1 = T2 /T1 for the same volume and quantity of gas. P2 = (758 mmHg) (45 +273 K) / (15 +273K) = 837 mmHg.

Explanation:

The structural formula of carbon is as shown below. Carbon is a nonmetallic and tetravalent compound that can accommodate 4 electrons to form a covalent bond. It has the capacity to establish bonds easily with other atoms and with other carbon atoms too, carbon is competent of establishing multiple stable covalent bonds with suitable multivalent atoms.

Chemical formula = [tex]C[/tex]

Answer:

1.37 mol NaCl

Explanation:

Hi!

For this one, you are given a mass (in grams) of NaCl, 80.0.

To convert this to moles, you have to do a mass-to-mole calculation, where you use the molar mass of NaCl.

Na's m.m. is 22.99 g/mol

Cl's m.m. is 35.45 g/mol

1(22.99 g/mol) + 1(35.45 g/mol) = 58.44 g/mol => here is the molar mass of NaCl.

Here's the setup for the conversion:

g(mol/g) - we are flipping g/mol to mol/g to get mol on top (since we are looking for the # of mol) and g on the bottom to cancel out the g unit.

80.0 g NaCl(1 mol NaCl/58.44 g NaCl) = 80.0 / 58.44 = 1.37 mol NaCl.

I hope this helped!

The products obtained from the reaction between HCl and NaOH are NaCl and H₂O

Chemical equations are representations of chemical reactions using symbols and formula of the reactants and products.

The reactants are located on the left side while the products are located on the right side.

Reactants —> Products

The balancing of chemical equations follows the law of conservation of matter which states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another.

The reaction between HCl and NaOH is a neutralization reaction which produces salt and water as shown below

HCl + NaOH → NaCl + H₂O

Products => NaCl and H₂O

Learn more about chemical equation:

https://brainly.com/question/7181548

#SPJ1

Answer:

The sand is much warmer than the water because water has a higher specific heat, or it takes more energy to change the temperature of water. Since they are absorbing energy from the same place, the sun, the sand will get warmer faster because it takes less energy to change the temperature.

Another reason could be because the water is constantly mixing with the water below it which is not exposed to the sun and because of this the water remains at a lower temperatre. The sand however has the same part exposed to the sun unless an external force, a foot, umbrella, wind, etc comes to move it. So it is able to absorb the sun for longer than the water.

Answer:

It will release H+ in water.

Explanation: