The pH of a solution of 3-hydroxypropanoic acid is measured to be . Calculate the acid dissociation constant of 3-hydroxypropanoic acid. Be sure your answer has the correct number of significant digits.

Answer:

the answer is A

Explanation:

since during a cold front the cold air replaces the warm air

Answer:

during a cold front, cold air mass is replaces a warm air mass.

Explanation:

hope this helps

Answer: :)

Explanation:

In a covalent bond, the atoms bond by sharing electrons. Covalent bonds usually occur between nonmetals. For example, in water (H2O) each hydrogen (H) and oxygen (O) share a pair of electrons to make a molecule of two hydrogen atoms single bonded to a single oxygen atom

Answer:

In a covalent bond, the atoms bond by sharing electrons. Covalent bonds usually occur between nonmetals. For example, in water (H2O) each hydrogen (H) and oxygen (O) share a pair of electrons to make a molecule of two hydrogen atoms single bonded to a single oxygen atom.

Explanation:

Answer:

Heat is transfered via solid material (conduction), liquids and gases (convection), and electromagnetical waves (radiation).

Explanation:

Answer:

Heat is transfered via solid material (conduction), liquids and gases (convection), and electromagnetical waves (radiation). Heat is usually transfered in a combination of these three types and seldomly occurs on its own.

Explanation:

hope this helps u.

Answer:

Biomass

Explanation:

It is Biomass because biomass is a Renewable and organic energy that is gotten from living things to generate sustainable electric energy. The farmer with corn and herds of cows has biomass energy resources because it is gotten from living things both plants and animals. The materials use for biomass gotten from plants and animals are woods, barks, straw, animals dung,gases produced by animals e.t.c.

Answer:

Explanation:

ammonite

Answer:

Ammonite

Explanation:

These are some awesome fossils

Plz mark B R A I N L I E S T

Answer:

It is Though the transfer of charges from one object to another, or (A).

Answer:

41 mL

Explanation:

Given data:

Milliliter of HCl required = ?

Molarity of HCl solution = 4.25 M

Mass of CaCO₃ = 8.75 g

Solution:

Chemical equation:

2HCl + CaCO₃      →    CaCl₂ + CO₂ + H₂O

Number of moles of CaCO₃:

Number of moles = mass/molar mass

Number of moles = 8.75 g / 100.1 g/mol

Number of moles = 0.087 g /mol

Now we will compare the moles of  CaCO₃ with HCl.

                      CaCO₃         :          HCl

                          1               :            2

                      0.087           :         2/1×0.087 = 0.174 mol

Volume of HCl:

Molarity = number of moles / volume in L

4.25 M = 0.174 mol / volume in L

Volume in L = 0.174 mol /4.25 M

Volume in L = 0.041 L

Volume in mL:

0.041 L×1000 mL/ 1L

41 mL

Answer:

Explanation:

O5Cl

Answer:

The answer is A. Erosion

Explanation:

Took the quiz

Answer:

A- erosion

Explanation:

Erosion occurs when water, wind, or ice removes soil and rock and deposits it in a new area.

Occurs naturally, but is also impacted by human activity.

Caused by farming, deforestation, and building roads and cities.

Answer:

b

Explanation:

Electrons have negative charges and Protons have positive.

you can remember this by (Pro)ton = (Pos)itive

Explanation:

It will not float on water

Substances with their densities less than that of water usually float on it and those with their densities greater than that of water will sink into it.

From the question the density of glass is 2.8 g/cm³ and this is greater than the density of water which is 1 g/cm³. Therefore glass will not float on water.

Hope this helps you

Answer:

Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ). Diffusion is one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.

Explanation:

Answer:

Diffusion is one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.

Answer:

Heterogeneous

Explanation:

not clear explanation sooory

The pressure of the dry gas : 687.5 torr

Dalton's law of partial pressures states that the total pressure of a mixture of gases is equal to the sum of the partial pressures of the component gases  

Can be formulated:  

P tot = P1 + P2 + P3 ....  

The partial pressure is the pressure of each gas in a mixture  

Since the gas mixture consists of He and H₂O :

P tot=P He + P H₂O

[tex]\tt 705=P~He+17.5\\\\P~He=705-17.5=687.5~torr[/tex]

Answer:

a drink my guy

Explanation:

just frozen

Answer:

c are there 93.5 of c yan siguro

This question is incomplete, the complete question is;

The rate constant for the reaction 3A equals 4B is 6.00 × 10⁻³ L.mol⁻¹min⁻¹.

how long will it take the concentration of A to drop from 0.75 to 0.25M ?

from the unit of the rate constant we know it is a second reaction order

OPTIONS

a) 2.2×10^−3 min

b) 5.5×10^−3 min

c) 180 min

d) 440 min

e) 5.0×10^2 min

Answer:

it will take 440 min for the concentration of A to drop from 0.75 to 0.25M

Option d) 440 min is the correct answer

Explanation:

Given that;

Rate constant K =  6.00 × 10⁻³ L.mol⁻¹min⁻¹

3A → 4B

given that it is a second reaction order;

k = 1/t [ 1/A - 1/A₀]

kt = [ 1/A - 1/A₀]

t = [ 1/A - 1/A₀] / k

K is the rate constant(6.00 × 10⁻³)

A₀ is initial concentration( 0.75 )

A is final concentration(0.25)

t is time required = ?

so we substitute our values into the equation

t = [ (1/0.25) - (1/0.75)] / (6.00 × 10⁻³)

t = 2.6666 / (6.00 × 10⁻³)

t = 444.34 ≈ 440 min     {significant figures}

Therefore it will take 440 min for the concentration of A to drop from 0.75 to 0.25M

Option d) 440 min is the correct answer

Answer:

yes

Explanation:

because it can take up space and it is a liquid and that is one of the three states of matter :]

Answer:

you will add then subtract to get the answer

Answer:

A Beryllium (Be) atom has 2 electron shells, whereas a Barium (Ba) atom has 6 electron shells

Explanation:

Beryllium (Be) is an element in group two of the periodic table with atomic number 4 (Is2 2s2). On the other hand, barium (Ba) is an element in group 2 of the periodic table with atomic number 56. However, as stated in the question, the Beryllium (Be) atom is smaller than the Barium (Ba) atom.

This is because a Beryllium (Be) atom has 2 electron shells, whereas a Barium (Ba) atom has 6 electron shells. The electron shells of Barium contains more electrons, which is responsible for the large size of the Barium atom. Note that, the higher the number of atoms, the larger the atomic size.

Answer:

1720 MeV

Explanation:

Thorium has 90 protons and 142 neutrons

The mass of each proton is 1.007277 amu

The mass of each neutron is 1.008665 amu

The mass of 90 protons is 90 * 1.007277 amu = 90.65493 amu

The mass of 142 neutrons is 142 * 1.008665 amu = 143.23043 amu

Total calculated mass of nucleons = 90.65493 amu + 143.23043 amu = 233.88536

Mass defect = 233.88536 amu - 232.038 amu = 1.84736 amu

We convert from amu to MeV using the conversion factor of 931

Binding energy = 1.84736 amu * 931 = 1720 MeV

Answer:

ok thx for the imformation can you help me with my qustion

Explanation:

Due to their comparable chemical activity, the periodic table's vertical columns are referred to as groups or families. The number of valence electrons and chemical characteristics are the same for all members of a family of elements.

The vertical columns of the periodic table also have a unique name. A group is what we call each column.

Each set of elements has an equal number of electrons in the outer orbital. The outer electrons are sometimes referred to as valence electrons.

The same valence shell electron arrangement gives the elements in the same group comparable chemical characteristics.

Because the valence shell electron configuration of the elements changes gradually along the row, the elements exhibit a gradual change in their chemical characteristics.

Therefore, elements in a vertical column on the Periodic Table have similar properties.

Learn more about similar properties here:

https://brainly.com/question/5087000

#SPJ2

Answer:

Cell growth usually refers to cell proliferation, the increase in cell numbers that occurs through repeated cell division. Cell growth can also refer to the enlargement of cell volume, which can take place in the absence of cell division. As living things grow, some cells die or become damaged and need replacements. Some single-celled organisms use a type of mitosis as their only form of reproduction. In multicellular organisms, cell division allows individuals to grow and change by expanding the number of total cells.

Hope this helps!!!

Answer:

Now, what happens if we turn the room thermostat up to 80 degrees F? Looking at your Capacity of Saturated Air table, you can see that as air temperatures rise, there is an increase in the ability of the air to hold moisture. At 80 degrees F the capacity of air increases to where it can hold 21.537 g/kg of water vapor.

Explanation:

Answer: At 80 degrees F the capacity of air increases to where it can hold 21.537 g/kg of water vapor.

Explanation:

The decay reaction of Carbon-14 which releases Beta particles, resulting in the element Nitrogen-14

Radioactivity is the process of unstable isotopes to stable isotopes by decay, by emitting certain particles,  

Carbon-14 emits beta β ₋₁e⁰ particles , so the atomic number increases by 1, the mass number remains the same

Reaction

[tex]\tt \large{\boxed{\bold{_6^{14}C\rightarrow _7^{14}N+_{-1}^0e}}[/tex]

Answer:

I think it's Physical, Chemical, then Physical

Explanation:

I hope I'm right, those answers sound about right to me

Answer:

c) removing fluoride ions.

Explanation:

Hello!

In this case, for this solubility product problem, it is very convenient to write the undergoing ionization reaction:

[tex]CaF_2(s)\rightleftharpoons Ca^{2+}(aq)+2F^-(aq)[/tex]

In such a way, via the Le Chatelier's principle, we remember that the addition of reactants shifts the reaction towards products, adding products shifts the reaction towards reactants, removing reactants shifts the reaction towards reactants and removing products shifts the reaction towards products. In means, that the best way to shift this reaction away from solid calcium fluoride and toward the dissolved ions is c) removing fluoride ions, because it is a product and its removal favors the formation of more products.

Best regards!

Answer:

C. commensalism.

Explanation:

Here is the answer

Answer: THE ANSWER IS A

Explanation: