what is the density of 96 mL of a liquid that has a mass of 90.5g?

Answer:

3.62

Explanation:

Using the Henderson-Hasselbach equation:

pH = pKa + log[base]/[acid]

pH = -log(1.8 x 10^-4) + log(0.15/0.20) = 3.62

The pH of acid is between 0-7 on pH scale while for base pH range is from 7-14. Therefore, the pH of of the buffer solution comprised of 0.20 M HCHO₂ and 0.15 M NaCHO₂. (Ka for HCHO2 = 1.8 x 10⁻⁴) is 3.62. pH is a unitless quantity.

pH is a measurement of amount of hydronium ion H₃O⁺ in a given sample. More the value of hydronium ion concentration, more will be the solution acidic.

On subtracting pH from 14, we get pOH which measures the concentration of hydroxide ion in a given solution. pH depend on the temperature. At room temperature pH scale is between 0 to 14. pH of neutral solution is 7.

Using the Henderson-Hassel Bach equation:

pH = pKa + log[base]/[acid]

pH = -log(1.8 x 10^-4) + log(0.15/0.20) = 3.62

Therefore, the pH of of the buffer solution comprised of 0.20 M HCHO2 and 0.15 M NaCHO2. (Ka for HCHO2 = 1.8 x 10-4) is 3.62.

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We frequently observe kids playing with polythene bags filled with water that have little holes drilled into them at various locations so they can sprinkle water on other kids. Through this experiment, we can say that pressure acts in all directions in liquids.

Since both liquids and gases may flow, they are both referred to as fluids. Fluids under rest pressure behave uniformly in all directions.

Weather forecasts can be made using barometers. They track the evolution of atmospheric pressure throughout time.

On weather forecast maps, pressure variations appear as an isobar pattern. Predictions are made using these changes in pressure, and they are fairly accurate when combined with wind observations.

As you go away from a liquid's surface, pressure rises. for instance: A bucket has three holes that are all the same size. Since there is more pressure at the bucket's bottom, the water spills out more forcefully. Dams are thicker at the bottom for this reason.

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Answer

Al₂Cl₆

Procedure

An empirical formula is a chemical formula showing the ratio of elements in a compound rather than the total number of atoms. It is the simplest whole number non-reducible ratio formula for a molecular formula or compound.

To find the empirical formula, we will need to follow the next steps:

0. Find the molar mass of each component (using the periodic table): Al=26.98, Cl=35.453

1. Convert to moles: Al=0.7487, Cl=2.2509

2. Find the smallest mole value: 0.7487

3. Divide all components by the smallest value: Al=1, Cl=3.0065

4. Round to closest whole numbers: Al=1, Cl=3

5. Combine to get the empirical formula: AlCl₃

6. Evaluate the weight of the current formula AlCl₃ = 133.34 g/mol

7. Multiply by 2 to get the formula that matches the weight Al₂Cl₆ = 267 g/mol

Carbon atoms may thus form bonds to as many as four other atoms. For example, in methane (CH 4​start subscript, 4, end subscript), carbon forms covalent bonds with four hydrogen atoms

__________________________________________________________

The number of molecules in the permanganate is 4.8 * 10^22 molecules

We know that if we are to obtain the number of molecules form the number of the moles of the substances then as a matter of necessity we would have to turn to the Avogadro's law and that is what we are going to do here.

We have that;

If 1 mole contains about 6.02 * 10^23 molecules

0.08 moles would contain 0.08 * 6.02 * 10^23/ 1

= 4.8 * 10^22 molecules

Hence, we have about 4.8 * 10^22 molecules in the permanganate

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Daylight of 15 hours 38 minutes is estimated to be on june 21 , in Alpena , Michigan at latitude 45'' north.

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A tube is the term used to describe the straw-like organ utilized by both plants and animals to consume food and water or to eliminate waste.

A hollow, cylindrical structure that is often present in living things is referred to as a tube. Many biological structures, such as blood veins, intestines, respiratory tracts, and the reproductive system, contain tubes. Many biological functions, including the passage of nutrients, the exchange of gases, and the removal of waste materials, depend on tubes.

These tubes are referred to as xylem and phloem in plants. While the phloem moves sugars and other nutrients from the leaves to other parts of the plant, the xylem is in charge of moving water and minerals from the roots to the rest of the plant.

Animals have many species-specific tube-like organs in charge of intake and waste elimination. Mammals, for instance, have a sophisticated digestive system that consists of the anus, esophagus, stomach, and intestines. Together, these organs help the body digest food, extract nutrients, and get rid of waste.

Generally, tubes or channels are essential for both plant and animal life because they let them take in the substances they need and let waste out.

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Answer:

I can say that knowledge of separating mixtures can help us in daily life and within society in the following ways:

1. Purification of water: Separation techniques are used to purify water for drinking and industrial purposes. It is essential to remove impurities from water to prevent diseases.

2. Recycling: Separation techniques are used to separate materials for recycling. This helps reduce the amount of waste in landfills and helps conserve resources.

3. Food industry: Separation techniques are used in the food industry to separate unwanted particles from food products. This helps ensure that the food we eat is safe and free from contaminants.

4. Medicine: Separation techniques are used in the pharmaceutical industry to separate and purify chemicals for use in medicine. This helps ensure that medicines are safe and effective.

5. Environmental protection: Separation techniques are used to remove pollutants from the environment. This helps protect our natural resources and prevent pollution-related health problems.

6. Oil and gas industry: Separation techniques are used to separate crude oil and natural gas into their various components. This helps in the production of energy and other useful products.

In summary, knowledge of separating mixtures is essential in our daily lives and within society. It helps ensure that we have access to safe and clean water, food, medicine, and energy, and also helps protect the environment.

Explanation:

When the equilibrium constant is higher than one, it indicates that the reaction prefers to produce products, whereas if the equilibrium constant is less than one, it indicates that the reaction prefers to produce reactants. If the equilibrium constant is equal to one, the reaction proceeds in both directions equally.

In a chemical reaction, exothermic reactions are defined as reactions that release heat into their environment. It implies that heat is given off when reactants are converted to products. At equilibrium, an exothermic reaction continues to be exothermic, meaning that heat is given off even after the reaction reaches a state of equilibrium.There are two types of reactions: exothermic and endothermic.

A reaction is classified as exothermic if it releases heat, and endothermic if it absorbs heat. The direction of the reaction is determined by whether it is exothermic or endothermic. At equilibrium, the reaction is no longer moving forwards or backwards. It's also worth noting that reactions can be exothermic in one direction and endothermic in the other.

The equilibrium constant (K) is defined as the ratio of the concentration of products to the concentration of reactants in the chemical reaction equation. It is used to express how much of the products is generated by the reaction in comparison to the reactants.  the equilibrium constant aids in the identification of the direction in which the reaction will proceed at equilibrium.

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Answer: (D.) Planting Roof gardens

Explanation: I'm really hoping you get this right but the reason of my answer is because Trees, green roofs, and vegetation can help reduce urban heat island effects by shading building surfaces, deflecting radiation from the sun, and releasing moisture into the atmosphere.

Winter is purple, spring is blue, summer is orange, fall is green.

Answer:

D

Explanation:

Because if I said its 35 degrees outside that has nothing to do with climate maybe if I said its usually 35 degrees in the month of December but just saying what temperature it doesn't tell you anything about climate

Well, the definition of climate is the weather conditions prevailing in an area in general or over a long period so I don't really know

So maybe it is d

Answer:

B

Explanation:

Weather refers to the short-term conditions of the lower atmosphere, such as precipitation, temperature, humidity, wind direction, wind speed, and atmospheric pressure. It could be sunny, cloudy, rainy, foggy, cold, hot, windy, stormy, snowing … the list goes on.

Answer:

Explanation:

1.1 we have to find mass of Na3PO4;

for that we have to Calculate the moles of Na3PO4 needed:

volume is 100mL = 0.1L

Molar concentration = Moles of solute / Volume of solution in L

0.1 mol/L = Moles of Na3PO4 / 0.1 L

Moles of Na3PO4 = 0.1 mol/L * 0.1 L

Moles of Na3PO4 = 0.01 mol

Now, Calculate the mass of Na3PO4 needed:

so, Mass = Moles of Na3PO4 * Molar mass of Na3PO4

Mass = 0.01 mol * 164 g/mol

Mass = 1.64 g of Na3PO4.

1.2 materials and glassware needed:

1.64 g Sodium phosphate (Na3PO4)

100 mL volumetric flask

weighing balance

Distilled water

Glass rod

Pipette and burette

Answer:

D). She should use a bar graph. The bottom of each bar should be labeled with the category of garbage. The vertical side should have a scale and be labeled "kilograms per year."​

Explanation:

Bar graphs are characterized as the graphic tool which are primarily employed to establish comparison between various groups or to observe the changes occurred over time.

As per the question, the environmental scientist must opt for the 'bar graph' as it will assist her in displaying the data of various categories(paper, yard waste, metals, etc.) through bars on the x-axis while the vertical side or y-axis would show 'kilograms per year' which will display the differences in their amounts. Thus, option D is the correct answer.

Answer:

electron capture I hope it will help you please follow me

Answer:

1-butene

Explanation:

In this case, the problem is already stating and saying the reaction involved here.

1-bromobutane undergoes a dehydrohalogenation in presence of a base. This will cause an elimination reaction forming a product.

As this is an elimination product, this can be done in two ways.

The first way is with an unimolecular reaction where the halide is eliminated from the starting reactant in a two step reaction involving a carbocation formation. This is known as E1 reaction. However, the conditions for this reaction is to be in acid medium.

The second way is with a bimolecular reaction where the halide is eliminated from the starting reactant in just one step, and no carbocation is formed. This is known as E2 reaction and is commonly used with bases.

In the case of this problem, we are undergoing an E2 reaction, therefore, the mechanism of reaction is just one step, and when this happens, the base substract the hydrogen from Carbon 2, eliminates the bromide and forms a double bond, giving the 1-butene.

You can see the mechanism in the following picture.

Hope this helps

1-butene is the organic byproduct of 1-bromobutane's dehydrohalogenation in the presence of a base.

In the process of dehydrohalogenation, a molecule loses both a hydrogen and a halogen atom (such as a halogen from chlorine, bromine, or iodine) to create an unsaturated compound. The production of alkenes or alkynes, which are crucial in organic chemistry, is frequently accomplished using this reaction. Eliminating a hydrogen halide (HX) from a halogenoalkane or alkyl halide is the most important step in dehydrohalogenation. The E1 and E2 reactions are the two basic processes that can be used to do this. There are two steps in the E1 reaction. The halogenoalkane first passes through ionisation and creates a carbocation intermediate.

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Answer:

b. vapor

Explanation:

When a liquid substance is heated sufficiently, the energy from the heat causes the molecules to gain enough kinetic energy to break the intermolecular bonds and escape into the air as individual gas molecules. This process is called evaporation, and the substance in this gaseous form is known as a vapor. The term "vapor" refers to the gaseous form of a substance that was originally in a liquid state, and it typically refers to the mixture of gas molecules that are in constant motion and in contact with the air.

Answer:

\(m_{O_2}=467gO_2\)

Explanation:

Hello.

In this case, for the reaction:

\(2H_2+O_2\rightarrow 2H_2O\)

The correct way to compute the oxygen that reacted is by considering the mass of hydrogen, 58.9 g, its molar mass, 2.02 g/mol, the 2:1 mole ratio between hydrogen and oxygen and the atomic mass of that gaseous oxygen 32.00 g/mol; therefore we use the following stoichiometric procedure:

\(m_{O_2}=58.9gH_2*\frac{1molH_2}{2.02gH_2}*\frac{1molO_2}{2molH_2} *\frac{32.00gO_2}{1molO_2} \\\\m_{O_2}=467gO_2\)

The same result could have been obtained by using the mass of water since the law of conservation of mass is obeyed here.

Best regards!

Answer:

decreases by 10 gram

Explanation:

Answer:a=10.3 b=250.7c c= gass d= liquid

Explanation:

Answer:

• SCl6 [ Sulphur hexachloride ]

• Na2O [ Sodium oxide ]

Or:

• Na2O2 [ Sodium peroxide ]

Explanation:

→ Ionic bonding or electrovalent bonding is the type of bonding between a metal and a non metal, where a metal loses its Outermost electrons to the non metal in order to gain stability.

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The mass of the asteroid is C. 1.2 x \(10^{12}\) Kg

To find the mass of the other asteroid, we can rearrange the equation for the gravitational force between two objects:

F = (G * m1 * m2) / \(r^{2}\)

where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two asteroids, and r is the distance between them.

Given that the distance between the asteroids is 75000 m, the force of gravity between them is 1.14 N, and one asteroid has a mass of 8 x \(10^{7}\) kg, we can substitute these values into the equation and solve for the mass of the other asteroid (m2):

1.14 N = (6.67430 × \(10^{-11}\) N \(m^{2}\)/\(Kg^{2}\) * 8 x \(10^{7}\) kg * \(m2\)) / \((75000 m)^{2}\)

Simplifying and solving the equation, we find that the mass of the other asteroid (m2) is approximately 1.2 x \(10^{12}\) kg. Therefore, Option C is correct.

The question was incomplete. find the full content below:

Two asteroids are 75000 m apart one has a mass of 8 x \(10^{7}\) kg if the force of gravity between them is 1.14 what is the mass of the asteroid

A. 3.4 x \(10^{11}\) kg

B. 8.3 x \(10^{12}\) kg

C. 1.2 x \(10^{12}\) kg

D. 1.2 x \(10^{10}\) kg

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The amount of the excess reactant that will remain if 16.0 g of solid iron reacts with 28.0 g of chlorine gas would be 1.68 grams.

Solid iron reacts with chlorine gas to produce iron chloride according to the following balanced equation:

\(2Fe + 3Cl_2 --- > 2FeCl_3\)

From the balanced equation, the mole ratio of iron to chlorine gas is 2:3. This means that every 1 mole of iron requires 1.5 moles of chlorine gas for a complete reaction.

recall that: mole = mass/molar mass

16.0 g of solid iron is equivalent to:

16/56 = 0.29 mol

28.0 g of chlorine gas would be equivalent to:

28/71 = 0.39 mol

With 0.29 mol of solid iron, the equivalent amount of chlorine gas that would be required according to the balanced equation would be:

0.29 x 3/2 = 0.41 mol

But only 0.39 mol of chlorine gas is available. So, chlorine is the limiting reactant.

The actual amount of solid iron that will react with 0.38 mol of chlorine would be:

2/3 x 0.39 = 0.26 mol

Excess solid iron = 0.29 - 0.26

                            = 0.03 mol

Mass of 0.03 mol iron = 0.03 x 56 = 1.68 grams

Thus, the amount of excess iron that will remain once the reaction is complete would be 1.68 grams.

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The percentage CaCl₂ : 65.14%

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

Reaction

3CaCl₂+2Na₃PO₄⇒Ca₃(PO₄)₂ + 6NaCl

mol Ca₃(PO₄)₂(MW=310.18 g/mol) :

\(\tt \dfrac{0.425}{310.18}=0.00137\)

mol ratio CaCl₂ : Ca₃(PO₄)₂ = 3 : 1, so mol CaCl₂ :

\(\tt \dfrac{3}{1}\times 0.00137=0.00411\)

mass CaCl₂ (MW=110.98 g/mol) :

\(\tt 0.00411\times 110.98=0.456~g\)

The percentage CaCl₂ :

\(\tt \%CaCl_2~in~mixture=\dfrac{0.456}{0.7}\times 100\%=65.14\%\)

Answer:

It is more difficult to remove electrons from a noble gas than it is to remove electrons from elements in other groups.

Explanation:

Let me restate here that in the noble gases, the outermost shell is filled. Owing to this full shell, noble gases has the outermost eight electrons required  for any specie to attain stability.

It is very difficult to remove an electron from a closed shell. This is why the first ionization energy of noble gases is usually far higher than that of elements from other groups.

Answer:

Your answer will be b(molten material from the outer core makes its way to the surface of earth)

Explanation:

Answer:

C

Explanation:

I'm pretty sure molten material comes from the inner core. I think you can search up this though, try to find where molten material comes from. Goodluck!

(a) [Na+(aq)] is 630 ppm

(b) [CO₃₂-(aq)] is 1.26 × 10-3 M

(c) Mass of Na₂CO₃ needed is 3.15 mg

The mass of an element is the average mass of the atoms of an element measured in atomic mass unit (amu, also known as daltons, D). The atomic mass is a weighted average of all of the isotopes of that element, in which the mass of each isotope is multiplied by the abundance of that particular isotope.

(a) [Na+(aq)] = 0.063% w/v × 10,000 ppm/1% = 630 ppm

(b) [CO₃₂-(aq)] = 2 × 630 ppm/1000 = 1.26 × 10-3 M

(c) Mass of Na₂CO₃ = (1.26 × 10-3 M)(250 mL)(106 mg/1 mol) = 3.15 mg

Therefore, the correct answers are as given above. It could then be concluded that Na+(aq)] as ppm is 630 ppm, CO32-(aq)] as a Molarity is 1.26 × 10-3 M, and the mass of sodium carbonate is needed to prepare 250 mL of this solution is 3.15 mg.

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Answer:

Explanation:

Using the standard solubility table , the solubility of sodium chloride is 36 g/100 mL water at 25°C.

Which means that 1 g of solid(that is in crystal form) sodium chloride will dissolve in 100 mL of water at 25°C.