Please help this is due tonight

Answer:

[tex]m_X=66.4385amu[/tex]

Explanation:

Hello there!

In this case, according to the given information for this problem, it turns out possible for us to calculate the average atomic mass of the element by multiplying the mass of each isotope by its percent abundance and then add up the results, just as shown below:

[tex]65.3410amu*0.3187=20.8242amu\\\\66.9519amu*0.6813=45.6143amu\\\\m_X=20.8242amu+45.6143amu\\\\m_X=66.4385amu[/tex]

Regards!

Answer:

Following are the solution to the given choice:

Explanation:

Hex-2-yne is just not alkyne symmetric, therefore two things respectively hexan-3-one and hexan-2-one are to be given.

The attached file it displayed the response along with the mechanism, please find the.

Answer:

Third option is the correct answer

Explanation:

A solution of sodium chloride and a precipitate of barium sulphate is formed.

Answer:

See Explanation

Explanation:

A fission reaction is a chain reaction. The neutrons that are produced in one reaction leads to further chain reaction in the system.

If one neutron initiates fission that leads to the production of two other neutrons,two more new reactions are initiated.

If these reactions each produce one neutron, then another two new reactions are initiated. This makes a total of four new reactions from the two fission events described.

A total of four neutrons is produced from the two fission events.

Answer:

If one neutron initiates a fission event that produces two neutrons in the products, how many new reactions can now be initiated?

2

If each of the neutrons produced in the first fission event then initiates a fission event that produces one neutron in the products, how many new reactions can now be initiated by each neutron?

1

How many neutrons in total were produced by the two fission events described?

4

Explanation:

Got it correct on Edge.

Answer: Silver bromide

Explanation: AgNO3 + KBr — AgBr + KNO3

Answer:

Baking Soda is NaHCO3 ---Sodium hydrogen Carbonate

Excessive use of Fertilizer can cause plants to develop shallow root systems,Decrease soil fertility and reduce Quality of Crops.

Answer:

Sodium bicarbonate, also called sodium hydrogen carbonate, or bicarbonate of soda,  is a source of carbon dioxide and so is used as an ingredient in baking powders, in effervescent salts and beverages, and as the main constituent of dry-chemical fire extinguishers.

Explanation:

Answer:

The answer is "[tex]\bold{21.616\ \ \frac{J}{mol K}}[/tex]".

Explanation:

when it is a constant pressure:

[tex]Cp= \frac{\Delta q}{n\Delta T} \\\\[/tex]

[tex]=\frac{229}{3\times 2.55}\\\\=\frac{229}{7.65}\\\\=29.93 \frac{J}{mol\ K}\\[/tex]

and,  

[tex]Cp-Cv=R\ \ (Mayer's\ formula)[/tex]

then,

[tex]Cv=Cp-R\\\\[/tex]  

    [tex]=29.93-8.314\\\\=21.616\ \ \frac{J}{mol K}[/tex]

Answer:

Q = 669.44 J

Explanation:

Given that,

Mass of water, m = 32 g

The temperature change from 25.0°C to 20.0°C.

We need to find the amount of heat energy transferred. Let it is Q. We know that,

[tex]Q=mc\Delta T[/tex]

Where

c is the specific heat of water

Put all the values,

[tex]Q=32\times 4.184 \times (20-25)\\Q=669.44\ J[/tex]

So, 669.44 J of heat energy is transferred from the water.

Answer:

The correct answer is option 4, that is, there is exactly enough sodium carbonate.

Explanation:

Based on the given question, the reaction will be,

2 HCl (aq) + Na2CO3 (s) ⇒ 2 NaCl (aq) + CO2 (g) + H2O (l)

Therefore, for neutralizing 2 moles of HCl, one mole of Na2CO3 is required.

No of moles present in 1 Kg or 1000 grams of Na2CO3 will be,

Moles = Weight/Molecular mass of Na2CO3

Moles = 1000 / 106 = 9.43

Thus, 9.43 moles of Na2CO3 is present.

No of moles present in 1 liter of 9.75 M HCl is 9.75.

No. of moles present in 5 Liters of HCl (9.75 M),

= 5 × 9.75 = 48.75

Thus, for 2 moles of HCl 1 mole of Na2CO3 is required. Now for 48.75 moles of HCl, the moles required of Na2CO3 is 9.75. Therefore, for complete neutralization, the moles of Na2CO3 required is 9.75, and the present moles is 9.43.

Hence, there is exactly enough sodium carbonate.

Answer:

That should be Hydrogen.

So The second option Is legit!

Answer:

Explanation:

Hope it helps ^-^

#CarryOnLearning

Answer:

When an atom has an equal number of electrons and protons, it has an equal number of negative electric charges (the electrons) and positive electric charges (the protons). The total electric charge of the atom is therefore zero and the atom is said to be neutral. ... Chemically, we say that the atoms have formed bonds

Answer:

Mass of solute in Kg = 0.07 Kg

Explanation:

Given

Molecular weight of the chemical = 28 grams per mole

Solution consists of 2.5 moles of solution

Mass of solute in the solution = 2.5 *28 = 70 grams

Mass of solute in Kg =  70 grams/1000 = 0.07 Kg

Answer:

"22.73 atm" is the correct answer.

Explanation:

Given:

Solubility,

[tex]S_1=0.66 \ g/L[/tex]

[tex]S_2=1.5 \ g/L[/tex]

Pressure,

[tex]P_1=10.0 \ atm[/tex]

[tex]P_2=?[/tex]

By using Henry's law,

⇒ [tex]\frac{S_1}{P_1} =\frac{S_2}{P_2}[/tex]

or,

⇒ [tex]P_2=\frac{S_2 P_1}{S_1}[/tex]

By putting the values, we get

⇒      [tex]=\frac{1.5\times 10.0}{0.66}[/tex]

⇒      [tex]=\frac{15}{0.66}[/tex]

⇒      [tex]=22.73\ atm[/tex]

Answer:

yes of course everyone know eclipse in ancient January 2004 eclipse was founded in other country's

Answer:

negatively

Explanation:

when soil erosion happens,by the agent of water for example,the soil will eventually lose it's valuable minerals and become infertile, people won't be able to grow crops there.

Schottky defects in its crystal units alters the density of a solid!

Answer:

D

Explanation:

Answer: Aluminum, because it allows heat to flow easily.

Have a nice day!

Answer:

well it is an Synthesis reaction

Explanation:

2NaCl-->2Na+ Cl2

Correct Option- Decomposition

_____________________________

Decomposition reactions are those reactions in which a compound breaks or splits into two or more simpler substances. In such reactions, one reactant breaks down to form many i.e. at least two products. These reactions require energy to break existing bonds, so they take place in the presence of heat, light, or electricity.

Example:- AB--> A+B

Answer:

x means unknown it is an unknown value.

For example if you have 2 x you have 2 u know values.

Explanation:

If you want us to explain it further please provide a picture.

What is X

X mean an Unknown value in a question.

for example :- 2x = 4

→ Here, the value of x is not known but it can be known by solving the problem.

The solution is :-

=> 2x = 4

=> x = 4/2

=> x = 2

So, here the value of X is 2

Hence, we can say that "X is an unknown value in a question and solving that question gives the correct value of x"

-TheExtraterrestrial

Answer:

silicon

Explanation:

because silicon has 14 electrons and protons

Answer:

When an acetic acid solution is titrated with sodium hydroxide, the slope of the titration curve (pH versus volume of NaOH added) increases when sodium hydroxide is first added. This change shows that acetic acid is being converted to sodium acetate.

Explanation:

ABOUT TITRATION - Titration is a chemical analysis method for determining the amount of a constituent in a sample by adding an exact known quantity of another substance to the measured sample with which the desired constituent reacts in a specific, known proportion. A burette, which is essentially a long, graduated measuring tube with a stopcock and a delivery tube at the bottom end, is used to gradually administer a standard solution of titrating reagent, or titrant.

It is feasible to identify a good visual color indicator for many titration processes that will signify the end point at, or very near to, the equivalence point.

Acid-base titrations, precipitation titrations, complex-formation titrations, and oxidation-reduction (redox) titrations are examples of such titrations, which are categorised according to the nature of the chemical reaction that occurs between the sample and the titrant.

Titrations of metal ions with the reagent disodium ethylenediaminetetraacetate are the most important titrations based on complex-formation processes (a salt of edetic acid, or EDTA).

Hence , the answer is that acetic acid is converted into sodium acetate.

Answer:

571.81 mL

Explanation:

Assuming constant pressure, we can solve this problem by using Charles' law, which states that at constant pressure:

Where in this case:

We input the data:

And solve for V₂:

The new volume would be 571.81 mL.

Answer:

The amount after three year is 617934.1302

Explanation:

Complete question

A person places $530,000 in an investment account earning an annual rate of 5.25%, compounded continuously. Using the formula V = Pe^{rt}V=Pe rt , where V is the value of the account in t years, P is the principal initially invested, e is the base of a natural logarithm, and r is the rate of interest, determine the amount of money, to the nearest cent, in the account after 3 years

Solution

The formula for calculating compound interest is

[tex]A = p (1 + \frac{r}{n})^{nt}[/tex]

Substituting the given values we get -

[tex]A = 530,000 (1 + \frac{5.25}{100})^3\\A = 530,000 * ( 1+ 0.0525)^3\\A = 530,000 * ( 1.0525)^3\\A = 617934.1302[/tex]

The amount after three year is 617934.1302

Answer:

the answer is copper wire

Answer:

Plants

Explanation:

Plants, part of the biosphere, grow in the soil, which is part of the geosphere

hope this helped :)

Answer:

Mars and Orbital code saber and the alien