If 4.0 mL of a 3.0 M HCl solution is exactly neutralized by a 3.0 mL sample of NaOH, then what is the concentration of the NaOH solution?​

The observation implies that the solubility of a solution depends on both the amount of solute and the volume of solvent.

The solubility of a substance is the property of that substance to dissolve in a solvent.

The solubility of a solution is the ability of the solution to dissolve solutes.

Solubility depends on the quantity of solutes and solvents.

Thus, 100 mL water may be able to dissolve 35 g NaCl but not 70 g because the maximum solubility of the water is breached. In order to dissolve more NaCl, the volume of the water might need to be increased.

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Answer:

See below, please

Explanation:

1 mol CH4 ——＞2 mol H2O=2x18 g/mol= 36 g

The question is not clear. You should tell us the concentration of CH4, methane.

Reaction

CH₄ (g) + 2O₂ (g) <=> CO₂ (g) + 2H₂O(g)

assume at STP ( 1 mole gas = 22.4 L)

for 20 L, moles of methane:

= 20 : 22.4 = 0.893

moles of water = 2/1 x mol methane = 2/1 x 0.893 = 1.786

mass of water = mol x molar mass = 1.786 x 18 g/mol = 32.148 g

Answer:

T=846K

Explanation:

We can use the formula for the Ideal Gas Equation, which is

[tex]PV=nRT[/tex]

P=pressure

V=volume

n=mols of gas

R=constant (0.08201 L-atm/mol-K)

T=temperature

We will have to rearrange to equation to find temperature, which is

[tex]T=\frac{PV}{nR}[/tex]

Time to solve:

[tex]T=\frac{(2.50 atm)(10.30L)}{(0.371 mols)(0.08206 L-atm/mol-K)}[/tex]

[tex]T=846 K[/tex]

If you want to convert to Celsius, subtract 273 to your answer, which will get you 573ºC.

Answer:

A. Protons

Explanation:

For an atom to be neutral, it must have the same number of electrons as protons. Since protons are positive and electrons are negative, that will result in a neutrally charged atom.

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Answer:

When fuels are burned in vehicle engines, high temperatures are reached. At these high temperatures, nitrogen and oxygen from the air combine to produce nitrogen monoxide. When this nitrogen monoxide is released from vehicle exhaust systems, it combines with oxygen in the air to form nitrogen dioxide.

Explanation:

Explanation:

Nitrogen and oxygen from the air combine at high temperatures in the engine to produce nitrogen (II) oxide by the reaction :

N2(g) + O2(g) → 2NO(g).

Nitric oxides rise in the atmosphere and are oxidized to nitrogen dioxide, NO2 which dissolves in the precipitating water to form acid rain.

Explanation:

1. Nitrogen

3. Oxygen

4. Helium

look into the periodic system

question 1: nitrogen

question 3: oxygen

question 4: helium

Answer:

(1)

(c) A teacher puts hot sodium into a gas jar of chlorine.

The changes seen before, during and after this reaction were observed.

Complete the sentences.

Choose the answers from the box.

colourless

green

lilac

silver

white

yellowlorange

Sodium is a

solid.

Chlorine is a

gas.

The hot sodium burns with a

flame.

The product sodium chloride is a

solid.

1. slivery-white

2. yellow

3. lilac

4. colourless

Explanation:

Answer:

material a

Explanation:

it is expensive which means it's better quality

it's easy to make so you will be able to make lots and then make more money to buy more material

Answer:

Explanation:

If you have your notes of the steps: like precipitation etc.. it should help you form a step by step phase change in raindrops.

Answer:

As a raindrop I would be in a body of water as a liquid. Slowly, the sun would heat me up until I evaporate. I would rise into the air as a gas and form a cloud as condensation. Then precipitation would occur. The temperature suddenly drops dramatically. I freeze and fall as a solid of ice.

I don't know if this is what you were looking for but I hope it helps.

Carbon dioxide (CO2) lewis structure has two oxygen atoms and one carbon atom. There are two double bonds around carbon atom in the CO2. No lone pairs on carbon atom and each oxygen atom has two lone pairs on their valence shells. Shape of CO2 is linear.

Answer:

DNA from dead Streptococcus cells entered live cells and altered the live cell's characteristics

I hope this helps you

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Answer:

Explanation:

According to Avogadro's law, the two gases will have equal number of molecules.

From the question, we are to determine how the two gases would compare according to Avogadro's law

First, we will state the Avogadro's law

Avogadro's law states that "equal volume of all gases at the same temperature and pressure contain the same number of molecules"

Now, from the given information

We have 2 liters of hydrogen gas and 2 liters of oxygen gas at the same temperature and pressure

According to Avogadro's law, gases that are equal in volume and are at the same temperature and pressure will have equal number of molecules.

Hence, according to Avogadro's law, the two gases will have equal number of molecules.

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Answer:

12-6

Explanation:

Answer:

.

Explanation:

Answer:

a units

Explanation:

i do rsm and its right

Answer:

a units.

Explanation:

If someone asks, "How many units are between 0 and 3?" you're going to say 3, right?

Answer:

kitchen

Explanation:

Chloroplast help to trap light energy from the sun which in turn is used to generate energy for the cell, likewise kitchen holds the materials that are required for cooking food which when taken gives the body energy as well.

We need pH

[tex]\\ \rm\Rrightarrow pH=-log[H^+][/tex]

[tex]\\ \rm\Rrightarrow pH=-log10^{-5}[/tex]

[tex]\\ \rm\Rrightarrow pH=5[/tex]

Acidic

Considering the definition of pH,  the pH is lower than 7, so the solution is basic.

pH is the Hydrogen Potential. It is a measure of acidity or alkalinity that indicates the amount of hydrogen ions present in a solution or substance.

Mathematically, pH is calculated as the negative base 10 logarithm of the activity of hydrogen ions:

pH= - log [H⁺]

The numerical scale that measures the pH of substances includes the numbers from 0 to 14. The pH value 7 corresponds to neutral substances. Acidic substances are those with a pH lower than 7, while basic substances have a pH higher than 7.

In this case,[H⁺]= 1×10⁻⁵ M.

Replacing in the definition of pH:

pH= - log (1×10⁻⁵ M)

Solving:

pH= 5

Finally, the pH is lower than 7, so the solution is basic.

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[tex]\longrightarrow[/tex]From the kinetic molecular theory of gases, the average speed of gas molecules at a specific temperature and pressure is given by :-

[tex]\green{ \underline { \boxed{ \sf{v_{avg} = \frac{8RT}{\pi M}}}}}[/tex]

where

[tex]\longrightarrow[/tex]For two different gases A and B at the same temperature, it can be shown that the average speeds are inversely proportional to the square root of their molecular masses-

[tex]\green{ \underline { \boxed{ \sf{ \frac{v_{avg} ^A}{v_{avg}^B} = \sqrt{\frac{M_A}{M_B}}}}}}[/tex]

[tex]\sf average \:velocity \:of \:Cl_2,v_{avg} ^B= 0.0380 \:m/s [/tex]

Now,

[tex]\sf Molar \:mass \:of \:Cl_2 = 2\times atomic \:mass \:of \:Cl[/tex]

[tex]\implies[/tex][tex]\sf Molar \:mass \: of \:Cl_2 = 2\times 35.5[/tex]

[tex]\implies[/tex][tex]\sf Molar \:mass \:of \: Cl_2 = 71 \:g[/tex]

similarly,

[tex]\begin{gathered}\\\implies\quad \sf Molar \: mass \:of \: SO_2 = atomic \:mass \:of \:S +2\times \: atomic \: mass \: of \: O \\\end{gathered} [/tex]

[tex]\begin{gathered}\\\implies\quad \sf 32 +2\times 16 \\\end{gathered} [/tex]

[tex]\begin{gathered}\\\implies\quad \sf 32 +32 \\\end{gathered} [/tex]

[tex]\begin{gathered}\\\implies\quad \sf 64 \\\end{gathered} [/tex]

Putting Values in formula to get average velocity -

[tex]\begin{gathered}\\\implies\quad \sf { \frac{v_{avg} ^{SO_2}}{v_{avg}^{Cl_2}} = \sqrt{\frac{M_{SO_2}}{M_{Cl_2}}}}\\\end{gathered} [/tex]

[tex]\begin{gathered}\\\implies\quad \sf { \frac{v_{avg} ^{SO_2}}{0.0380} = \sqrt{\frac{71}{64}}}\\\end{gathered} [/tex]

[tex]\begin{gathered}\\\implies\quad \sf \frac{v_{avg} ^{SO_2}}{0.0380} = 1.05 \: \\\end{gathered} [/tex]

[tex]\begin{gathered}\\\implies\quad \sf v_{avg} ^{SO_2}= 1.05 \times 0.038 \: \\\end{gathered} [/tex]

[tex]\begin{gathered}\\\implies\quad \sf v_{avg} ^{SO_2} = 0.4 \: m/s\: \\\end{gathered} [/tex]

[tex]\longrightarrow[/tex]Thus the average velocity of sulphur dioxide molecules under the same conditions is 0.4 m/s

Answer:

14.297%

Explanation:

Answer:

14.297%

Explanation:

this is the percentage

First, let's recall the equation for half-life:

N(t) = [tex]N_{0}[/tex] · [tex]\frac{1}{2}^{\frac{t}{t_{1/2}}}[/tex]

Woah.

While we could certainly solve this question by using the half-life equation, it might be easier to just give this question some thought.

Half-life, is, essentially, the time it takes for radioactive material to be halved.   For example, if something had a half-life of ten years and weighed 20 pounds, after ten years it would weigh 10 pounds and after another ten years would weigh 5 pounds, then 2.5, and so on. (Note that it never actually reaches 0! It keeps halving and halving over and over again, becoming smaller and smaller but never disappearing!)

In this question, we're given the half-life of Carbon-14 and asked how old a tree with 1/4 the amount of carbon-14 of a normal tree would be. Let's think about this question:

We figured out that it takes two half-lives for Carbon-14 to be 1/4 its original amount! Since the duration of a half-life never changes, we can simply multiply 5730 by 2 to find how many years it'd take to achieve two half-lives:

5730 · 2 = 11460

The tree is about 11,460 years old.

And we've solved it! (A quick tip - if you ever encounter a question like this again, you can quickly calculate the number of half-lives in your head depending on the amount remaining that they give you. Just keep halving the amount every half-life! One half-life is 1/2, two half-lives is 1/4, three is 1/8, four is 1/16, and so on and so forth)

If you have any questions about anything I explained here or need clarification on anything, just let me know! Good luck!

- breezyツ

Answer:

Adenine=33%

Thymine=33%

Guanine=17%

Explanation:

the base pairs percentages must be the same

A light-year is the distance a beam of light travels in a single Earth year. so it is A distance

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Answer:

lithium ion ,zinc ion and iodine ion will move to negative electrode while bromide,chloride and barium ion will move to positive electrode

Answer:

really?!

Explanation:

this is a test your suppose to answer it

Answer:

i also need like your question

Explanation:

Which statement is correct about the rocks at this location?

A. All three types of rock will become metamorphic if they stay at the surface of Earth.

B. If this location is buried deep underground, only the metamorphic rock will melt because it has already been heated before.

C. The metamorphic rock and sedimentary rock were already at this location and magma flowed into the other rocks.

D. The igneous rock will become metamorphic rock after the rock in the cliff side turns into sediment.