Would changing the physical property of a substance will create a new substance
true or false ​

Answer:

1.123x10⁻⁴ moles of alanine

Explanation:

In order to convert grams of alanine into moles, we need to know its molecular weight:

The formula for alanine is C₃H₇NO₂, meaning its molecular weight would be:

Then we divide the sample mass by the molecular weight, to do the conversion:

Answer:

Ok:

Explanation:

So, you can use the Henderson-Hasselbalch equation for this:

pH = pKa + log([tex]A^-/HA[/tex]) where A- is the conjugate base of the acid. In other words, A- is the deprotonated form and HA is the protonated.

We can solve that

1 = log([tex]A^-/HA\\[/tex]) and so 10 = [tex]A^-/HA[/tex] or 10HA = A-.  For every 1 protonated form of adenosine (HA), there are 10 A-. So, the percent in the protonated form will be 1(1+10) or 1/11 which is close to 9 percent.

Nucleoside is "a structural subunit of nucleic acids, the heredity-controlling components of all living cells, consisting of a molecule of sugar linked to a nitrogen-containing organic compound".

Nucleic acids are "naturally occurring chemical compounds that serve as the primary information-carrying molecules in cells".

Nitrogen is "an essential element for all forms of life and is the structural component of amino acids from which animal and human tissues, enzymes, and many hormones are made".

Organic compound is "any of a large class of chemical compounds in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or nitrogen".

Using Henderson-Hasselbalch equation

pH = pKa + log(A⁻/HA)

where pH is the concentration of [H⁺]

           pKa is the acid dissociation constant and [A⁻] and [HA] are the concentrations of conjugate base and an acid.

1 = log (A⁻/HA)

Thus, 10 = A⁻/HA

10HA = A⁻ Each protonated form of adenosine (HA) contains 10 A⁻

Hence, the percentage of the protonated form at pH 4.8 will be 1(1+10) or 1/11 which is closer to 9 percent.

To learn more about nucleoside here

https://brainly.com/question/20373356

#SPJ2

Answer:

[tex]mg(oh) {}^{2} + 2hcl) \\ gives \\ \: mgcl2 + 2h {}^{2}o[/tex]

[tex]option. b \: is \: the \: correct \\ \: balanced \: equation[/tex]

Answer:

2 atoms of carbon combine with 6 atoms of hydrogen to from ethane.

Answer:

The worldly answer is 42

Explanation:

there you go

Answer:

[tex]P_4+5O_2\rightarrow P_4O_{10}[/tex]

Explanation:

Hello!

In this case, when we want to balance chemical reactions such as in this case, the idea is to equal to number of atoms of each element at each side of the equation according to the lay of conservation of mass, just as shown below:

[tex]P_4+5O_2\rightarrow P_4O_{10}[/tex]

Because we have four phosphorous and ten oxygen atoms at each side.

Best regards!

Answer:

The first and most obvious pattern I see is that all gas giants have an atmosphere mainly made up of hydrogen

The second thing I notice is that all the rocky planets have a significant amount of Nitrogen in their atmospheres except Mercury.

The third thing I notice is that all planets have one element that makes up 75% or more of its atmosphere except Mercury.

(If this is good, may I have brainliest, please? I'm kinda poor..)

Answer:

It's hard to find patterns in the solar system's atmosphere but I think above found a lot of them.

Answer:

Rain forest.

Explanation: Because of how humid it is in a rain forest that humidity will bring a lot of pressure from above.

Answer:

A is the answer. Here is proof. Plz mark brainliest.

Explanation:

Answer:

yes

Explanation:

no jk, whats the mass?

Answer:

elementas

Explanation:

Answer:

I think it's sedimentation

To solve such this we must know the concept of chemical reaction. Therefore, the correct option is option C. Sedimentation is the process which is responsible for causing this column of rock to form.

Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved.

There are so many types of chemical reaction reaction like combination reaction, double displacement reaction. Among all the given processes, sedimentation is the process which is responsible for causing this column of rock to form. Weathering is erosion upper layer of soil.

Therefore, the correct option is option C.

Learn more about the chemical reactions, here:

https://brainly.com/question/3461108

#SPJ2

Answer:element symbol

Explanation:

An element symbol is the one or two letter sequence to at identifies an element, typically used through the periodic table

Symbols are abbreviations used in chemistry for chemical elements, functional groups and chemical compounds.

example:

H, Cl ,N , Ne etc.

Answer:

The melting temperature of a rock will decrease

Explanation:

In the case when the water vapour and the carbon dioxide is added to the rock so the rock melting temperature would be reduced as if we added the salt  to an ice on a road so it reduced the temperature

Therefore according  to the given situation, the last option is correct

And, the rest of the options are wrong

The following Balanced Reaction will take place:

Zn + 2HCl → ZnCl₂ + H₂

In the question, we have 2 moles of Zinc and 3 moles of HCl for this reaction

Amount of HCl required to completely react with 2 moles of Zn:

Since we need 2 moles of HCl for every mole of Zn, we will need 2(2) = 4 moles of HCl for every 2 moles of Zn

Identifying the Limiting Reagent:

But we are only given 3 moles of HCl where we need 4 moles to completely react.

So, since HCl is in less amount, it is the Limiting Reagent

Answer:

NH3(aq) + HNO3(aq) → NH4NO3(aq) Calculate the volume of an acid (1.5 M HNO3) needed to neutralize the 1.5 M HNO3.

Explanation:

Answer:

b

Explanation:

wave transfers energy from one place to another

Answer:

no he don't have to be adopted he just different from his parents

Answer:

Ar > Cl > P > Si.

The mole fraction of KCl = 0.105

Given

%w/w KCl = 32.7

Required

the mole fraction of KCI

Solution

For 100 g solution : KCl = 32.7 g, H₂O = 67.3 g

mol KCl :

[tex]\tt \dfrac{32.7}{74.55~g/mol}=0.439[/tex]

mol H₂O :

[tex]\tt \dfrac{67.3}{18.016}=3.74[/tex]

total mol of solution = 0.439+3.74=4.179

mol fraction of KCl :

[tex]\tt \dfrac{0.439}{4.179}=0.105[/tex]

Answer:

32.7

Explanation:

Answer:

.................................................................                                                                           :3

Explanation:

Answer:

2

Explanation:

Given that the energy of a photon of light is obtained from;

ΔE = hf = 6.6 * 10^-34 Js * 6.903 * 10^14 = 45.6 * 10^-20 J

For moving from n=2 -n-=5 the electron absorbed energy hence the energy is positive.

but;

ΔE = -2.18 * 10^-18 (1/n^2final - 1/n^2initial)

45.6 * 10^-20 J= 2.18 * 10^-18 J (1/n^2final - 1/5^2)

0.21 =  (1/n^2final - 1/5^2)

1/n^2final = 0.21 + 1/5^2

n^2final = 4

nfinal = 2

The principal quantum level for the final state in this electronic transition is 2.

We first find the wavelength of the hydrogen atom Using the formula;

λ = c/f

λ= wavelength  of the photon

h = Plank's constant

f = frequency

λ =3 × 10^8 m/s / 6.903 x 10^14 s-1

λ = 4.3459 × 10^-7 m

Now that we know that

We can now use the Rydberg equation 1/λ =R(1/n²f -1/n²i)to  determine the principal quantum level in which the electron stopped.

Remember that Rydberg constant =   1.09 x 10^7 m⁻1

1/λ =R(1/n²f -1/n²i)

1/4.3459 × 10^-7 m = 1.09 x 10^7 m⁻1(1/n²f -1/5²)

1/(4.3459 × 10^-7 m x1.09 x 10^7) = (1/n²f -1/5²)

1/4.7370= (1/n²f -1/5²)

0.211= (1/n²f -1/5²)

1/n²f= 0.211+ (1/5²)

1/n²f= 0.211+0.04

1/n²f=0.25

n²f=1/0.25

nf  =   √4

nf =  2

Therefore final transistion is 2.0

Learn more on Calclations involving principal quantum level here:https://brainly.com/question/14651828

Answer:

Explanation:

The density of a substance can be found by using the formula

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

From the question we have

[tex]density = \frac{60}{15} \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

Partial pressure of carbon dioxide in the atmosphere =  0.0003184 atm (Approx)

Explanation:

Given:

Partial pressure of carbon dioxide in the atmosphere = 0.0318 kPa

Computation:

1 Kilo-pascal (kPa) = 0.00986923 atm

Partial pressure of carbon dioxide in the atmosphere = 0.0318 kPa

Partial pressure of carbon dioxide in the atmosphere = 0.0318 kPa x 0.00986923 atm

Partial pressure of carbon dioxide in the atmosphere =  0.0003184 atm (Approx)

Answer:

okii is it on your page

Explanation:

Answer:

hello

Explanation:

Answer:

C) There are fewer particles in the balloons than were in the cylinder.

Explanation:

Hope this helps good luck!- Angel

Answer:

Chlorine

Carbon

Sulphur

Rest all are metals.

More to know -

Silver metal is use in jewellery

helium is present is atmosphere ( it is harmful for living being )

Carbon is use in wires

Iron is uses in many articles like ships , Iron nail

Calcium is use to purify water

Answer: 3 4 a noodles

Explanation: just is[tex]\lim_{n \to \infty} a_n \lim_{n \to \infty} a_n \lim_{n \to \infty} a_n \left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right] \sqrt{x} x^{2} x^{2}[/tex]

Answer:

See explanation

Explanation:

The reaction between formic acid and potassium hydroxide is an acid base reaction.

Remember that an acid base reaction yields salt and water only.

If you look at the curved arrow mechanism shown, you will discover that the hydroxide ion from KOH abstracts a proton from the acid to yield potassium formate and water

Answer:

The elements toward the bottom left corner of the periodic table are the metals that are the most active in the sense of being the most reactive. Lithium, sodium, and potassium all react with water, for example.

Explanation: