hi:) i need help with q17. Thanks in advance:)

Answer:

N-terminal Phe, C-terminal Ser

Explanation:

Amino acids connect like

NH2 -CH(R1) -CO -NH-CH(R2)-CO-.....-NH-CH(Rn)COOH

So, 1st amino acid is N -terminal , and it is Phe.

Last amino acid is C- terminal, and it is Ser.

Answer:

chemical energy to thermal energy

Explanation:

Then the person must click the on button once this occurs the electrical energy is transformed into thermal energy. There are other types of flat irons such as using water to create steam to straighten the hair or using a chemical called butane this is chemical energy which is later transformed into thermal energy.

Explanation:

Electrical energy is transformed to heat energy when the curling iron stays on. Heat energy is transferred to the hair that is being curled.

Answer:

c-gamma decay

Explanation:

In gamma decay, neither the atomic number or the mass number is changed

Answer:I think it is C not positive though

Explanation:

In one of your trials you placed 5.5 grams of salt in 10 ml of water. (a) The w/w % is 35.48% (b) The w/v % is 55 % (c) The moles of NH₄Cl is 0.1  mol (d) The molarity of solution is 10 M.

Concentration % (w/w) = [tex]\frac{\text{Weight of solute}}{\text{Weight of solution}} \times 100[/tex]

Weight of solution = Solute + Solvent

                              = 5.5 g + 10g    [ 1 ml water = 1 g water]

                              = 15.5

Concentration % (w/w) = [tex]\frac{\text{Weight of solute}}{\text{Weight of solution}} \times 100[/tex]

                                     = [tex]\frac{5.5}{15.5} \times 100[/tex]

                                     = 0.3548 × 100

                                     = 35.48 %

Concentration %(w/v) = [tex]\frac{\text{Mass of solute (in g)}}{\text{Volume of solution (in ml)}} \times 100[/tex]

                                    = [tex]\frac{5.5}{10} \times 100[/tex]

                                    = 55%

To calculate the number of moles of a substance we have to divide the given mass/weight of the substance by the molar mass of the substance.

Moles = [tex]\frac{\text{Given Mass}}{\text{Molar mass }}[/tex]

          = [tex]\frac{5.5}{53.5}[/tex]

          = 0.1 mol

Molarity (M) is defined as the number of solute dissolved in per liter of solution.

Molarity (M) = [tex]\frac{\text{Number of moles of solute}}{\text{Volume of solution (in liters)}}[/tex]

Convert ml into l

1 ml = 0.001 liter

10 ml = 10 × 0.001

         = 0.01 liter

Now put the value in above formula we get

Molarity (M) = [tex]\frac{\text{Number of moles of solute}}{\text{Volume of solution (in liters)}}[/tex]

                    = [tex]\frac{0.1}{0.01}[/tex]

                    = 10 M

Thus from the above conclusion we can say that In one of your trials you placed 5.5 grams of salt in 10 ml of water. (a) The w/w % is 35.48% (b) The w/v % is 55 % (c) The moles of NH₄Cl is 0.1  mol (d) The molarity of solution is 10 M.

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Answer:

i think it's D I'm not sure...

Answer:

b, if it produced in an earlier step

Explanation:

i got it right :) hope this helps!!

Answer:

A Lever

Explanation:

Answer:

Option A

He

Explanation:

Ideal gas: refers to a type of gas having a perfectly elastic collisions between atoms or molecules with no intermolecular attractive forces. Helium is the most ideal gas amongst the given options because it exists as a single atom, with a low boiling point with a very low or even zero intermolecular interaction.

SO2 is less volatile having more intermolecular interaction (van da waal interaction, this is the reason for it's deviation from ideality).

H2 almost behaves like an idea gas because it has a low intermolecular interaction not zero.

N2 is not an ideal gas

F2  is not the most ideal gas.

Final answer:

Helium (He)- (a) is most likely to behave like an ideal gas at higher pressures due to its minimal intermolecular forces and very small atomic radius, which make its behavior under such conditions closer to the assumptions of the ideal gas law.

Explanation:

Answer:

The magnet will exert a force on the electric current

Explanation:

The electric current flowing through the cord will experience magnetic force due to presence of magnetic field created by the magnet brought near it.

The magnitude of the magnetic force experienced by this flowing current is given as;

F = qvB

where;

q is charge of electron (measured in coulomb's, C)

v is the speed of the flowing current (m/s)

B is the magnetic field strength (T)

Therefore, the magnet will exert a force on the electric current

Answer:

When you stir a spoonful of sugar into a glass of water, you are forming a solution. This type of liquid solution is composed of a solid solute, which is the sugar, and a liquid solvent, which is the water. As the sugar molecules spread evenly throughout the water, the sugar dissolves.

The volume of the drum after chilled quickly is 3.6 L.

Explanation:

As per the Charles Law, for any gas at constant pressure, volume of the gas is in direct proportion with the temperature measured in Kelvin. As the temperature increases, the gas expands and vice versa.

[tex]$\frac{V1}{T1} = \frac{V2}{T2} \\[/tex]

After chilling the drum, the volume will get reduced and it can be found as,

V2 = [tex]$\frac{V1T2}{T1}[/tex]

     = [tex]$\frac{7.7 L \times 282 K}{598 K}[/tex]

      = 3.6 L

Here the drum is chilled quickly, that is temperature is reduced and so the volume also decreases.

5. 1.16 x [tex]10^{26}[/tex] moles  moles of pennies would be required to equal the mass of the moon.

6. 12.86 moles of ethanol are in a 750 ml bottle of vodka.

Explanation:

5 .Data given:

mass of penny = 2.5 grams

atomic mass of penny = 62.93 grams/mole

moles present in mass of the moon given as = 7.3 x [tex]10^{24}[/tex] kg

number of moles = [tex]\frac{mass}{atomic mass of 1 mole}[/tex]

number of moles = [tex]\frac{2.5}{62.93}[/tex]

0.039 moles of penny is present in 2.5 grams

0.039 moles of penny in 2.5 grams of it

so, x moles in 7.3 X [tex]10^{27}[/tex]  grams

[tex]\frac{0.039}{2.5} =\frac{x}{7.3 X 10^{27} }[/tex]

x = 1.16 x [tex]10^{26}[/tex] moles

so when the mass of the penny given is equal to the mass of moon, number of moles of penny present is 1.1 x [tex]10^{26}[/tex] .

6.

Given:

vodka = 40% ethanol

volume of vodka bottle = 750 ml

moles of ethanol =?

density of ethanol =0.79 g/ml

atomic mass of ethanol = 46.07 grams/mole

so, from the density of ethanol given we can calculate how much ethanol is present in the solution.

density = [tex]\frac{mass}{volume}[/tex]

density x volume = mass

0.79 x 750 = 592.5 grams

number of moles = [tex]\frac{mass}{atomic mass of 1 mole}[/tex]

number of moles of ethanol = [tex]\frac{592.5}{46.07}[/tex]

                                               = 12.86 moles of ethanol

Answer:

Find another food source

Explanation:

They should Find another tree or food soure

Answer:

0.211 mol CaCI2

Explanation:

on edge

The molar mass of nitrogen gas  N₂ is 28 g/mol. Thus, the number of moles present in 23.4 g is 0.83 moles.

Nitrogen is 7the element in periodic table. It exists in diatomic state or molecular state as  N₂ gas. Two nitrogen atoms are covalently bonded together through sharing of three electrons each.

One mole of any element contains  6.022 × 10²³ atoms. This number is called Avogadro number. The mass of one mole of a substance is called its molar mass.

The atomic mass of N is 14 g/mol. Thus, for  N₂ the mass is 28 g/mol. Hence, one mole of nitrogen gas weighs 28 g. The number of moles in 23.4 g of  N₂ is calculated as follows:

Number of moles = weight / molar mass

                             = 23.4 g/28 g/mol

                             = 0.83 moles.

Therefore, the number of moles of  N₂ in 23.4 g is 0.83.

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Your question is incomplete. But your complete question probably was:

How many moles are in 23.4 g of N₂.

Answer:

The coronavirus has RNA?

Explanation:

Coronaviruses are important human and animal pathogens and contain an extraordinarily long (27-31 kb) RNA genome. Its RNA synthesis involves complex mechanisms of regulation, similar to those of DNA viruses. In this treatise, mouse hepatitis virus (MHV) is used as a model for the discussion of the mechanism of viral RNA synthesis. We show that MHV RNA synthesis requires interactions of multiple RNA components, which are likely mediated by protein-RNA and protein-protein, as well as RNA-RNA, interactions. This virus also provides a unique example of a discontinuous transcription mechanism, which involves a trans-acting RNA component. Finally, study of the cis-acting signals for the various steps of RNA synthesis revealed an insight into the regulation of viral RNA synthesis. This discussion suggests that the regulation of RNA synthesis in coronavirus is more complex than previously thought possible for RNA viruses. Coronavirus RNA transcription and replication may serve as a paradigm of RNA synthesis for RNA viruses in general.

Answer:

m lost an electron coz it transffered it

Answer:

I am not sure but DO NOT PICK SCHWANN.

Explanation:

That other person is wrong. Maybe it is Virchow. Sorry if I am wrong.

The scientist most likely to write a book titled 'Cells Come from Cells' is Rudolf Virchow, as he popularized the idea that all cells arise from pre-existing cells.

The scientist most likely to write a book titled Cells Come from Cells is Rudolf Virchow. Virchow is known for popularizing the concept that all cells arise from pre-existing cells, an idea that greatly contributed to the development of the modern cell theory. This statement became known as `Virchow's Law' or 'Omnis cellule e cellula', which means 'every cell comes from a cell'.

Other scientists such as Hooke, Schwann, and Schleiden made key contributions to the cell theory as well, but their work focused on different aspects. Hooke, for example, first identified and named cells, but did not propose their mode of formation. Similarly, Schwann and Schleiden identified that both plants and animals are made up of cells.

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Answer:

a bird sitting on a branch

Answer:

less denser

Explanation:

soild

solid (steel) is the most dense,

gas

the gas (air) is the least dense

liquid

the density of the liquid (water) is in between

Answer:

[tex]\large \boxed{\text{0.028 24 mol/L}}[/tex]

Explanation:

1. Balanced chemical equation.

The unbalanced equation is  

As₄O₆ + I₃⁻ ⟶ H₃AsO₄ + I⁻

The balanced equation is

1As₄O₆ + 4I₃⁻ + 10H₂O ⟶ 4H₃AsO₄ + 12I⁻ + 8H⁺

2. Moles of As₄O₆

[tex]\text{Moles of As$_{4}$O}_{6} =\text{ 0.1021 g As$_{4}$O}_{6} \times \dfrac{\text{1 mol As$_{4}$O}_{6}}{\text{395.68 g As$_{4}$O}_{6}} = 2.580 \times 10^{-4} \text{ mol As$_{4}$O}_{6}\\\\=\text{0.2580 mmol As$_{4}$O}_{6}[/tex]

3. Moles of I₃⁻

[tex]\text{Moles of I}_{3}^{-} = \text{0.2580 mmol As$_{4}$O}_{6} \times \dfrac{\text{4 mmol I}_{3}^{-}}{\text{1 mmol As$_{4}$O}_{6}} =\text{1.032 mmol I}_{3}^{-}[/tex]

4. [I₃⁻]

[tex]c = \dfrac{\text{1.032 mmol }}{\text{36.55 mL }} = \textbf{0.028 24 mol/L}\\\text{The concentration of I$_{3}^{-}$ is $\large \boxed{\textbf{0.028 24 mol/L}}$}[/tex]

The molarity of the iodide ion in the given solution has been 0.028 M.

The balanced chemical reaction can be given as:

[tex]\rm As_4O_6\;+\;4\;I^3^-\;+\;10\;H_2O\;\rightarrow\;4\;H_3AsO_4\;+\;12\;I^-\;+\;8\;H^+[/tex]

Moles of [tex]\rm \bold{As_4O_6}[/tex] = [tex]\rm \dfrac{0.1021}{395.68}[/tex]

Moles of [tex]\rm \bold{As_4O_6}[/tex] = 0.2580mmol

Moles of [tex]\rm \bold{I^3^-}[/tex] = [tex]\rm moles\;of\;As_4O_6\;\times\;ratio\;of\;\dfrac{I^3^-}{As_4O_6}[/tex]

Moles of [tex]\rm \bold{I^3^-}[/tex] = 0.2580 [tex]\rm \times\;\dfrac{4}{1}[/tex]

Moles of [tex]\rm \bold{I^3^-}[/tex] = 1.032 mmol

Molarity = [tex]\rm \dfrac{moles}{volume\;(L)}[/tex]

Molarity = [tex]\rm \dfrac{1.032\;\times\;10^-^3}{36.55\;\times\;10^-^3}[/tex]

Molarity = 0.028 M

The molarity of the iodide ion in the given solution has been 0.028 M.

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Answer:

A

Explanation:

With chemical reactions, there are various factors that affect the rate of the reaction. One of these is temperature.

When you raise the temperature, the reaction will move faster. Why? Temperature is directly correlated with the kinetic energy (basically, the energy that makes the particles move). Higher temperatures mean higher kinetic energies. Particles with higher kinetic energies move faster, which makes them more likely to collide. When collisions occur more frequently, the reaction follows through more quickly.

Thus, when Julissa warms the solutions, she will see that bubbling and white solid formation (the products of the reaction) occus faster. So, the answer is A.

Hope this helps!

Answer:

the volume is 20 just subtract

Explanation:

Answer:

Neutral

Explanation:

The protons and Electrons are equal, so the cancel out each other's charge This leaves the  Neutral charge of Neutrons, so, the Atom of Silicon is Neutral.

The charge of an atom's nucleus is determined by its number of protons. In this case, the nucleus has a +14 charge.

The nucleus of an atom contains its protons and neutrons. The charge of the nucleus is determined by the number of protons because neutrons do not carry a charge. Therefore, an atom with +14 protons would have a +14 charge in its nucleus, because the protons each have a +1 charge, irrespective of the number of neutrons or electrons.

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Answer:

depends how long the line is

Explanation:

if the line is short then the distance is short if its long then the distance is long

Answer : The number of moles of [tex]Cl^-[/tex] ions are, 5.00 mole.

Explanation :

When 1 mole of [tex]ZnCl_2[/tex] dissociates then it gives 1 mole of [tex]Zn^{2+}[/tex] ion and 2 moles of [tex]Cl^-[/tex] ions.

As we are given that there are 2.50 mole of [tex]ZnCl_2[/tex].

Now we have to determine the number of moles of [tex]Cl^-[/tex] ions.

As, 1 mole of [tex]ZnCl_2[/tex] dissociate to give 2 moles of [tex]Cl^-[/tex] ions.

So, 2.50 mole of [tex]ZnCl_2[/tex] dissociate to give [tex]2\times 2.50=5.00[/tex] moles of [tex]Cl^-[/tex] ions.

Therefore, the number of moles of [tex]Cl^-[/tex] ions are, 5.00 mole.

There are 5.00 moles of Cl- in 2.50 moles of ZnCl2.

We have that the amount of moles of ZnCl2 is equal to 2.50 moles, so, according to the equation that forms this compound we can say that:

                                      [tex]Zn + 2Cl[/tex] ⇒[tex]ZnCl_{2}[/tex]

So, 1 mole ZnCl2 of  decomposes as 1 Zn ion and 2 Cl ions, that is, the number of moles of chlotide is twice the number of moles of ZnCl2:

                                     [tex]2 \times 2.50 = 5.00 moles[/tex]

So, there are 5.00 moles of Cl- in 2.50 moles of ZnCl2.

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I believe that the answer is density.

Reason being is because the density of an object does not change when an object changes size.

The physical properties are the physical modifications like color, conductivity, shape, etc. Density does not vary with changes in size.

Physical properties are the reversible properties related to the appearances, melting and the boiling point, conductivity, density, shininess, etc.

The density of the silver element does not vary with changes in the size of the sample as it is a physical property and is constant. The volume is the physical property that varies with size and flammability and reactivity with oxygen are chemical properties.

Therefore, option C. density is the physical property that will not vary with size.

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Answer:

vegetative reproduction

Explanation:

Answer:

Animal Regeneration

Since the 2 pieces are made of the same material (aluminum), they have the same specific heat.  Then the piece of lower mass will warm up faster.

ΔT = Q/(mc)

They both receive the same heat transfer Q from the sun,  they both have the same specific heat c, so the one of lower mass m attains the higher temperature rise ΔT over the same time interval.

The 20-gram piece of aluminum will heat up by ten degrees faster than the 40-gram piece because it has less mass. This is based on the properties of heat capacity, represented by the formula for heat transfer Q = mcΔT.

This question is about heat capacity, a concept in physics related to the thermal properties of materials including aluminum. The heat capacity of an object determines how much it will heat up for a given amount of heat applied. It is determined by an object's mass and the specific heat of its material.

As both objects in question are made of aluminum, the specific heat of the material is the same, and thus the only factor that makes a difference is the mass. The heat capacity of an object is proportional to its mass, so a larger object will take longer to heat up. Consequently, the 20-gram piece of aluminum will heat up faster than the 40-gram piece.

This is because less energy is needed to cause a given temperature increase in a smaller mass than in a larger mass, due to the direct proportionality of heat, mass, and temperature change. This is represented by the formula for heat transfer Q = mcΔT, where Q is the heat transferred, m is the mass, c is the specific heat, and ΔT is the change in temperature.

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