A stock solution has a concentration of 68.2 g/L. A 13.750 g/L solution is required. If you use a 1000.0 mL volumetric flask for the dilution, what volume (in ml) needs to be taken from the stock solution? Give your answer to three significant figures.

Answer:

Potassium (K) = (2,8,8,1)

This is the element that has three(3) filled energy level and one valence electron

Explanation:

P1V1/T1=P2V2/T2(general gas equation)

(829×1.85)/(273+15)=712×V2/(273+46)

V2=2.386L

Answer:

7,491 lb/cu ft.

Explanation:

Answer:

Combustion – substance reacts with oxygen often producing heat and light. Oxygen is ALWAYS one of the reactants. ... CH4 + 2O2 → CO2 + 2H2O Incomplete combustion – carbon monoxide and water.

Explanation:

Answer:

sample B contains the larger density

Explanation:

Given;

volume of sample A, V = 300 mL = 0.3 L

Molarity of sample A, C = 1 M

volume of sample B, V = 145 mL = 0.145 L

Molarity of sample B, C = 1.5 M

molecular mass of sodium chloride, Nacl = 23 + 35.5 = 58.5 g/mol

Molarity is given as;

[tex]C = \frac{moles \ of \ solute, \ mol}{liters \ of \ solvent} \\\\Moles \ of \ solute \ for \ sample \ A = 1 \times 0.3 = 0.3 \ mol\\\\Moles \ of \ solute \ for \ sample \ B = 1.5 \times 0.145 = 0.2175 \ mol[/tex]

The reacting mass for sample A = 0.3mol x  58.5 g/mol = 17.55 g

The reacting mass for sample B = 0.2175 mol x 58.5 g/mol = 12.72 g

The density of sample A  [tex]= \frac{mass}{volume} = \frac{17.55}{0.3} = 58.5 \ g/L[/tex]

The density of sample B [tex]= \frac{mass}{volume} = \frac{12.72}{0.145} = 87.72 \ g/L[/tex]

Therefore, sample B contains the larger density

Answer:

Explanation:

CO2 consists of individual molecules with one central carbon atom double bonded to two oxygen atoms. Silicon does not form double bonds with oxygen. ... because of this reason co2 is gas but sio2 is solid.

Hope that helps you Buddy ...

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I hope you understand and thank you for your questions

Answer:

Chemical equations show the ending outcome, while Chemical formulas only show how you lead up to it.

Explanation:

Answer:

2K(s) + F₂(g) —> 2KF(s)

Explanation:

__K(_) + __F₂(g) —> __KF(_)

The above equation can be balance as follow:

K(s) + F₂(g) —> KF(s)

There are 2 atoms of F on the left side and 1 atom on the right side. It can be balance by writing 2 before KF as shown below:

K(s) + F₂(g) —> 2KF(s)

There are 2 atoms of K on the right side and 1 atom on the left side. It can be balance by writing 2 before K as shown below:

2K(s) + F₂(g) —> 2KF(s)

Now, the equation is balanced.

Answer:

A

Explanation:

A scientist is a person who conducts scientific research to advance knowledge in an area of interest.

In classical antiquity, there was no real ancient analog of a modern scientist. Instead, philosophers engaged in the philosophical study of nature called natural philosophy, a precursor of natural science. It was not until the 19th century that the term scientist came into regular use after it was coined by the theologian, philosopher, and historian of science William Whewell in 1833.

examples are

Answer:

.....

Explanation:

D0wnload Phot0Math......................

Answer:

Influenza is a respiratory infection that is spread through contact with respiratory secretions from an infected person who is sneezing and/or coughing. illness—each year approximately 36,000 persons die as a result of complications of influenza and over 200,000 are hospitalized.

Explanation:

Influenza is a contagious respiratory illness caused by influenza viruses. It can cause mild to severe illness. Serious outcomes of flu infection can result in hospitalization or death.

The flu attacks the lungs, nose, and throat. Young children, older adults, pregnant women, and people with chronic disease or weak immune systems are at high risk.

Symptoms include fever, chills, muscle aches, cough, congestion, runny nose, headaches, and fatigue.

If you have influenza, you can expect the illness to go away on its own in about 7 to 10 days. In the meantime, you can take steps to feel better: Get extra rest. Extra rest can help you feel better.

Answer:

Chlorination is a process which involves adding of chlorine to water but the chlorinating product which does not necessarily have to be pure chlorine

Answer:

element has this explanation and is actually the smallest unit with chemical properties

Answer:

Energy efficiency

Explanation:

Answer:

Efficiency

Explanation:

It's quiet easy if you ask me haha

Answer:

a) water expands when it freezes and damages the cell wall.

Explanation:

We know that most liquids expand when heated and contract when cooled. Water does not behave in the same way.

Water contracts on cooling from any temperature until 4°C when it begins to expand until 0°C. Hence a given mass of water has its least volume and highest density at 4°C.

Hence, fresh vegetables with high water content do not freeze well because water expands when it freezes and damages the cell wall.

Answer:

The concentration of hydrochloric acid would be estimated to be less.

Explanation:

This is because, the hydroxyl ions from water react with the hydrogen ions from the hydrochloric acid, hence decreasing the moles of hydrogen ions which lowers the acidic strength of Hydrochloric acid.

If water was used to rinse the burette and the burette is then used to dispense hydrochloric acid solution, the final estimate of hydrochloric acid concentration will be less.

It is usual to rinse the burette with the solution that ought to be in it after rinsing it with water.

However, in this case, the burette was was rinsed with water alone and then it was used to dispense the hydrochloric acid solution.

The water will dilute the hydrochloric acid solution thereby making the final estimate of hydrochloric acid concentration to be less.

Hence, if water was used to rinse the burette used to dispense the hydrochloric acid solution, the  final estimate of hydrochloric acid concentration will be less.

Learn more: https://brainly.com/question/19131363

Answer:

a. 0.026 M

Explanation:

Molarity is a measure of the molar concentration of a solution. It can be calculated by using the following formula:

Molarity = n/V

Where;

n = number of moles (mol)

V = Volume of solution (L)

Based on the information provided;

V = 23.2mL = 23.2/1000 = 0.0232 L

n = ?

To get the number of moles of KHP, we use the formula:

mole = mass/molar mass

mole (n) = 0.123/204.2

mole (n) = 0.0006024mol

Molarity = n/V

Molarity = 0.0006024 ÷ 0.0232

Molarity = 6.024 × 10^-4 ÷ 2.32 × 10^-2

Molarity = 6.024/2.32 × 10^(-4--2)

Molarity = 2.59 × 10^-2

Molarity = 0.026 M

Answer:

c

Explanation:

Answer:

C

Explanation:

similar physical properties

Answer:

Please find the report on the comet below

Explanation:

Specifically in the year 1993, a comet was discovered by three individuals namely: Eugene Shoemaker, Carolyn Shoemaker, and David Levy. The comet was named after the first discoverers as; Shoemaker-Levy 9.

Shoemaker-Levy 9 was reported to have already been in pieces as at the time of discovery. It was believed to have been torn apart by the gravitational force emanating from the biggest of the planets called JUPITER.

In July 1994, Shoemaker-Levy 9 came in contact with Jupiter in what seemed to be the end of the discovered comet. This collision of Shoemaker-Levy 9 with planet Jupiter was said to be the first ever solar systems collision observed.

Answer:

5ML

Explanation:

Neutral litmus paper is usually purple. however in this case the neutral color seems to be yellow. Litmus can also be prepared as an aqueous solution that functions similarly. Under acidic conditions, the solution is red, and under alkaline conditions, the solution is blue.

________________________________

Using ideal gas law–

We'll use formula,

PV = nRT

Where,

P, Pressure = 1.40 atm

V, Volume = 42.4 L

n, Number of moles = ( To find ) ?

T, temperature = 25°C

R, Ideal gas constant = 0.08206 L . atm/k. Mol

________________________________

Here, PV = nRT

Or, PV / RT = n

Or, [tex] \frac{1.40 \: atm \times42.4 \: litres }{298 \: k \: \times 0.08206 \: l.atm /k \: .mol} = n[/tex]

Or, n = 2.43 Moles.

Or, n = 2.43 Moles.

________________________________

I had to take help from my elder brother.

We tried our best, hope it helps you.

By– Debasis ( feat – Apollo)

________________________________

Answer:

50%

Explanation:

This is a simple one trait Punnett square.

Because we know that the recessive trait is blue (yy) thanks to the text mentioning SpongeSusie being blue and recessive. Spongebob is yellow with a genotype of Yy or heterozygous. So we need two y to make a blue baby.

Yy X yy = 50% yellow Yy and 50% blue yy